./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/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 fa528625528e1eb8428ab738bffd6c9e4b89662e .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:54:42,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:54:42,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:54:42,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:54:42,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:54:42,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:54:42,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:54:42,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:54:42,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:54:42,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:54:42,194 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:54:42,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:54:42,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:54:42,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:54:42,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:54:42,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:54:42,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:54:42,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:54:42,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:54:42,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:54:42,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:54:42,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:54:42,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:54:42,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:54:42,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:54:42,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:54:42,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:54:42,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:54:42,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:54:42,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:54:42,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:54:42,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:54:42,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:54:42,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:54:42,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:54:42,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:54:42,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:54:42,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:54:42,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:54:42,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:54:42,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:54:42,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:54:42,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:54:42,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:54:42,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:54:42,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:54:42,302 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:54:42,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:54:42,302 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:54:42,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:54:42,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:54:42,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:54:42,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:54:42,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:54:42,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:54:42,305 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:54:42,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:54:42,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:54:42,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:54:42,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:54:42,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:54:42,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:54:42,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:54:42,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:54:42,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:54:42,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:54:42,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:54:42,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:54:42,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:54:42,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:54:42,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:54:42,310 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_ede50bee-c73b-4dcf-9e5b-749595848d11/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa528625528e1eb8428ab738bffd6c9e4b89662e [2020-11-29 19:54:42,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:54:42,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:54:42,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:54:42,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:54:42,643 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:54:42,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test24-2.c [2020-11-29 19:54:42,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/data/fc4a1feef/fc5a9f92dfec4317a3b90cdf855a92fc/FLAG85d845e46 [2020-11-29 19:54:43,182 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:54:43,183 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/sv-benchmarks/c/ldv-regression/test24-2.c [2020-11-29 19:54:43,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/data/fc4a1feef/fc5a9f92dfec4317a3b90cdf855a92fc/FLAG85d845e46 [2020-11-29 19:54:43,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/data/fc4a1feef/fc5a9f92dfec4317a3b90cdf855a92fc [2020-11-29 19:54:43,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:54:43,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:54:43,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:54:43,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:54:43,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:54:43,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7688be73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43, skipping insertion in model container [2020-11-29 19:54:43,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:54:43,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:54:43,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:54:43,886 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:54:43,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:54:43,947 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:54:43,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43 WrapperNode [2020-11-29 19:54:43,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:54:43,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:54:43,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:54:43,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:54:43,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:54:43,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:54:43,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:54:43,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:54:43,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:43,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:44,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:44,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:44,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... [2020-11-29 19:54:44,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:54:44,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:54:44,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:54:44,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:54:44,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:54:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:54:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:54:44,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:54:44,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:54:44,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:54:44,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:54:44,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:54:44,644 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:54:44,647 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-29 19:54:44,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:54:44 BoogieIcfgContainer [2020-11-29 19:54:44,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:54:44,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:54:44,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:54:44,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:54:44,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:54:43" (1/3) ... [2020-11-29 19:54:44,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7636f9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:54:44, skipping insertion in model container [2020-11-29 19:54:44,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:54:43" (2/3) ... [2020-11-29 19:54:44,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7636f9a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:54:44, skipping insertion in model container [2020-11-29 19:54:44,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:54:44" (3/3) ... [2020-11-29 19:54:44,662 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-11-29 19:54:44,676 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:54:44,682 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:54:44,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:54:44,742 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:54:44,743 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:54:44,743 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:54:44,743 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:54:44,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:54:44,744 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:54:44,744 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:54:44,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:54:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-29 19:54:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:54:44,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:44,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:44,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1829445793, now seen corresponding path program 1 times [2020-11-29 19:54:44,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:44,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104955002] [2020-11-29 19:54:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:45,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104955002] [2020-11-29 19:54:45,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:54:45,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:54:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630064462] [2020-11-29 19:54:45,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:54:45,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:54:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:54:45,022 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-11-29 19:54:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:45,036 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-11-29 19:54:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:54:45,037 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 19:54:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:45,073 INFO L225 Difference]: With dead ends: 31 [2020-11-29 19:54:45,073 INFO L226 Difference]: Without dead ends: 13 [2020-11-29 19:54:45,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:54:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-29 19:54:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-29 19:54:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 19:54:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 19:54:45,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-11-29 19:54:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:45,117 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 19:54:45,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:54:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-29 19:54:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:54:45,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:45,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:45,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:54:45,119 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash 672236885, now seen corresponding path program 1 times [2020-11-29 19:54:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:45,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580734255] [2020-11-29 19:54:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:45,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580734255] [2020-11-29 19:54:45,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:54:45,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:54:45,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952895671] [2020-11-29 19:54:45,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:54:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:54:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:54:45,225 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-11-29 19:54:45,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:45,245 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-29 19:54:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:54:45,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 19:54:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:45,246 INFO L225 Difference]: With dead ends: 24 [2020-11-29 19:54:45,247 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 19:54:45,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:54:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 19:54:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-29 19:54:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 19:54:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-29 19:54:45,252 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-11-29 19:54:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:45,252 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-29 19:54:45,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:54:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-29 19:54:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:54:45,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:45,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:45,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:54:45,254 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1835948819, now seen corresponding path program 1 times [2020-11-29 19:54:45,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:45,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402082174] [2020-11-29 19:54:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:45,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402082174] [2020-11-29 19:54:45,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915198832] [2020-11-29 19:54:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:54:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:45,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:45,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 19:54:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710799136] [2020-11-29 19:54:45,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:54:45,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:54:45,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:54:45,497 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-11-29 19:54:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:45,531 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-29 19:54:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:54:45,532 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 19:54:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:45,533 INFO L225 Difference]: With dead ends: 26 [2020-11-29 19:54:45,533 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 19:54:45,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:54:45,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 19:54:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-29 19:54:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 19:54:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 19:54:45,538 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-11-29 19:54:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:45,538 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 19:54:45,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:54:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 19:54:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:54:45,539 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:45,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:45,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 19:54:45,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash -823346863, now seen corresponding path program 2 times [2020-11-29 19:54:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:45,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911384149] [2020-11-29 19:54:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:45,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911384149] [2020-11-29 19:54:45,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970273509] [2020-11-29 19:54:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:45,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:54:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:54:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:46,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:46,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 19:54:46,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651897882] [2020-11-29 19:54:46,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:54:46,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:54:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:54:46,098 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-11-29 19:54:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:46,160 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-11-29 19:54:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:54:46,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-29 19:54:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:46,163 INFO L225 Difference]: With dead ends: 28 [2020-11-29 19:54:46,163 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 19:54:46,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:54:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 19:54:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-11-29 19:54:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 19:54:46,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 19:54:46,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-11-29 19:54:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:46,168 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 19:54:46,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:54:46,168 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 19:54:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:54:46,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:46,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:46,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:46,397 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash -900956145, now seen corresponding path program 3 times [2020-11-29 19:54:46,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:46,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389633441] [2020-11-29 19:54:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:46,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389633441] [2020-11-29 19:54:46,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127845168] [2020-11-29 19:54:46,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:46,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 19:54:46,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:54:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:54:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467783436] [2020-11-29 19:54:46,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:54:46,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:54:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:54:46,623 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-11-29 19:54:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:46,703 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-29 19:54:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:54:46,706 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-29 19:54:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:46,706 INFO L225 Difference]: With dead ends: 30 [2020-11-29 19:54:46,706 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 19:54:46,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:54:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 19:54:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-29 19:54:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:54:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 19:54:46,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-11-29 19:54:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:46,711 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 19:54:46,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:54:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 19:54:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:54:46,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:46,712 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:46,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:46,917 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1825935181, now seen corresponding path program 4 times [2020-11-29 19:54:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226665258] [2020-11-29 19:54:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226665258] [2020-11-29 19:54:47,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149121252] [2020-11-29 19:54:47,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:47,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:54:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:54:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:47,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:47,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 19:54:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620436086] [2020-11-29 19:54:47,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:54:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:47,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:54:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:54:47,151 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-11-29 19:54:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:47,201 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-29 19:54:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:54:47,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 19:54:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:47,203 INFO L225 Difference]: With dead ends: 32 [2020-11-29 19:54:47,204 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 19:54:47,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:54:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 19:54:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-29 19:54:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:54:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-29 19:54:47,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-11-29 19:54:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:47,209 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-29 19:54:47,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:54:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-29 19:54:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:54:47,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:47,210 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:47,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:47,433 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1856518389, now seen corresponding path program 5 times [2020-11-29 19:54:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:47,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711302858] [2020-11-29 19:54:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711302858] [2020-11-29 19:54:47,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882088200] [2020-11-29 19:54:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:47,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 19:54:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:54:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:47,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:47,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 19:54:47,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732574594] [2020-11-29 19:54:47,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 19:54:47,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:54:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:54:47,699 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-11-29 19:54:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:47,735 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-29 19:54:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:54:47,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-29 19:54:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:47,739 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:54:47,739 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 19:54:47,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:54:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 19:54:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-29 19:54:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 19:54:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-29 19:54:47,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-11-29 19:54:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:47,743 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-29 19:54:47,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 19:54:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-29 19:54:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 19:54:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:47,744 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:47,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 19:54:47,945 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1641347255, now seen corresponding path program 6 times [2020-11-29 19:54:47,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:47,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583595605] [2020-11-29 19:54:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:48,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583595605] [2020-11-29 19:54:48,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35646930] [2020-11-29 19:54:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:48,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 19:54:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:54:48,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:48,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:48,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 19:54:48,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349403901] [2020-11-29 19:54:48,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:54:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:54:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:54:48,277 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-11-29 19:54:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:48,317 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-29 19:54:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:54:48,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-29 19:54:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:48,321 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:54:48,321 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:54:48,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:54:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:54:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-29 19:54:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 19:54:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-29 19:54:48,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-11-29 19:54:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:48,333 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-29 19:54:48,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:54:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-29 19:54:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 19:54:48,336 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:48,337 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:48,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:48,537 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1020317689, now seen corresponding path program 7 times [2020-11-29 19:54:48,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:48,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621385505] [2020-11-29 19:54:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621385505] [2020-11-29 19:54:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653676441] [2020-11-29 19:54:48,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 19:54:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:48,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:48,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 19:54:48,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696137704] [2020-11-29 19:54:48,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:54:48,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:54:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:54:48,811 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-11-29 19:54:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:48,873 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-29 19:54:48,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:54:48,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-11-29 19:54:48,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:48,874 INFO L225 Difference]: With dead ends: 38 [2020-11-29 19:54:48,875 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:54:48,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:54:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:54:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-29 19:54:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:54:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 19:54:48,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-11-29 19:54:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:48,879 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 19:54:48,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:54:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 19:54:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 19:54:48,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:48,880 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:49,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:49,081 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:49,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:49,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1211358907, now seen corresponding path program 8 times [2020-11-29 19:54:49,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:49,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761157980] [2020-11-29 19:54:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:49,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761157980] [2020-11-29 19:54:49,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606475300] [2020-11-29 19:54:49,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:49,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:54:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 19:54:49,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:49,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:49,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 19:54:49,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781841569] [2020-11-29 19:54:49,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 19:54:49,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:49,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 19:54:49,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:54:49,379 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-11-29 19:54:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:49,437 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-11-29 19:54:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 19:54:49,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-29 19:54:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:49,439 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:54:49,439 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 19:54:49,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:54:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 19:54:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-11-29 19:54:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:54:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 19:54:49,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-11-29 19:54:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:49,443 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 19:54:49,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 19:54:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 19:54:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-29 19:54:49,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:49,444 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:49,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-29 19:54:49,645 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:49,646 INFO L82 PathProgramCache]: Analyzing trace with hash -118375677, now seen corresponding path program 9 times [2020-11-29 19:54:49,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:49,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999241080] [2020-11-29 19:54:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:49,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999241080] [2020-11-29 19:54:49,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685516573] [2020-11-29 19:54:49,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:50,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-29 19:54:50,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:50,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:54:50,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:50,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:50,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 19:54:50,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791164221] [2020-11-29 19:54:50,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 19:54:50,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 19:54:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:54:50,123 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-11-29 19:54:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:50,205 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-11-29 19:54:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:54:50,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-11-29 19:54:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:50,208 INFO L225 Difference]: With dead ends: 42 [2020-11-29 19:54:50,208 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:54:50,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-11-29 19:54:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:54:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-29 19:54:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 19:54:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-29 19:54:50,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-11-29 19:54:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:50,213 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-29 19:54:50,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 19:54:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-29 19:54:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 19:54:50,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:50,214 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:50,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:50,415 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:50,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2028479167, now seen corresponding path program 10 times [2020-11-29 19:54:50,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:50,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872302292] [2020-11-29 19:54:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:50,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872302292] [2020-11-29 19:54:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237310071] [2020-11-29 19:54:50,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:50,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:54:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:50,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 19:54:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:50,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:50,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 19:54:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924381128] [2020-11-29 19:54:50,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 19:54:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 19:54:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:54:50,748 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2020-11-29 19:54:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:50,827 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-29 19:54:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 19:54:50,828 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-11-29 19:54:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:50,829 INFO L225 Difference]: With dead ends: 44 [2020-11-29 19:54:50,829 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 19:54:50,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-29 19:54:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 19:54:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-29 19:54:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 19:54:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-29 19:54:50,833 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-11-29 19:54:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:50,834 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-29 19:54:50,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 19:54:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-29 19:54:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-29 19:54:50,835 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:50,835 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:51,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:51,053 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:51,053 INFO L82 PathProgramCache]: Analyzing trace with hash 608069631, now seen corresponding path program 11 times [2020-11-29 19:54:51,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:51,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143806529] [2020-11-29 19:54:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:51,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143806529] [2020-11-29 19:54:51,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518303040] [2020-11-29 19:54:51,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:51,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 19:54:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 19:54:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:51,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:51,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 19:54:51,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73423299] [2020-11-29 19:54:51,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 19:54:51,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 19:54:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:54:51,580 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 15 states. [2020-11-29 19:54:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:51,657 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-11-29 19:54:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 19:54:51,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-11-29 19:54:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:51,659 INFO L225 Difference]: With dead ends: 46 [2020-11-29 19:54:51,659 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 19:54:51,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:54:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 19:54:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-11-29 19:54:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:54:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-11-29 19:54:51,663 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2020-11-29 19:54:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:51,664 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-11-29 19:54:51,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 19:54:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-11-29 19:54:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 19:54:51,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:51,664 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:51,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 19:54:51,865 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash 300759869, now seen corresponding path program 12 times [2020-11-29 19:54:51,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:51,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808863475] [2020-11-29 19:54:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:52,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808863475] [2020-11-29 19:54:52,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505750520] [2020-11-29 19:54:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:53,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-29 19:54:53,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 19:54:53,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:53,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:53,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 19:54:53,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939373617] [2020-11-29 19:54:53,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 19:54:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 19:54:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:54:53,295 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 16 states. [2020-11-29 19:54:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:53,379 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-29 19:54:53,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 19:54:53,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-11-29 19:54:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:53,380 INFO L225 Difference]: With dead ends: 48 [2020-11-29 19:54:53,380 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 19:54:53,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:54:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 19:54:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-29 19:54:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 19:54:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-29 19:54:53,385 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-11-29 19:54:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:53,385 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-29 19:54:53,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 19:54:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-29 19:54:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 19:54:53,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:53,386 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:53,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 19:54:53,586 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1328822011, now seen corresponding path program 13 times [2020-11-29 19:54:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:53,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96010356] [2020-11-29 19:54:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:53,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96010356] [2020-11-29 19:54:53,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221548703] [2020-11-29 19:54:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 19:54:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:53,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:53,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 19:54:53,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98171913] [2020-11-29 19:54:53,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 19:54:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 19:54:53,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:54:53,979 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 17 states. [2020-11-29 19:54:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:54,059 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-11-29 19:54:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 19:54:54,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-11-29 19:54:54,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:54,060 INFO L225 Difference]: With dead ends: 50 [2020-11-29 19:54:54,060 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 19:54:54,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-29 19:54:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 19:54:54,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-11-29 19:54:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 19:54:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-11-29 19:54:54,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-11-29 19:54:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:54,065 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-11-29 19:54:54,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 19:54:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-11-29 19:54:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-29 19:54:54,066 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:54,066 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:54,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 19:54:54,277 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1454062393, now seen corresponding path program 14 times [2020-11-29 19:54:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:54,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505139878] [2020-11-29 19:54:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:54,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505139878] [2020-11-29 19:54:54,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682666727] [2020-11-29 19:54:54,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:54,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:54:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 19:54:54,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:54,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:54,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 19:54:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029343016] [2020-11-29 19:54:54,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 19:54:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 19:54:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:54:54,673 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-11-29 19:54:54,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:54,754 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-11-29 19:54:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 19:54:54,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-11-29 19:54:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:54,755 INFO L225 Difference]: With dead ends: 52 [2020-11-29 19:54:54,755 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 19:54:54,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-29 19:54:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 19:54:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-29 19:54:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:54:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-11-29 19:54:54,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2020-11-29 19:54:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:54,761 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-11-29 19:54:54,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 19:54:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-11-29 19:54:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 19:54:54,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:54,762 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:54,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:54,963 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1550985207, now seen corresponding path program 15 times [2020-11-29 19:54:54,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:54,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281766014] [2020-11-29 19:54:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:55,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281766014] [2020-11-29 19:54:55,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748203638] [2020-11-29 19:54:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:57,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-29 19:54:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 19:54:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:57,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:57,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 19:54:57,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050402696] [2020-11-29 19:54:57,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 19:54:57,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:57,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 19:54:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:54:57,361 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 19 states. [2020-11-29 19:54:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:57,429 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-11-29 19:54:57,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 19:54:57,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-11-29 19:54:57,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:57,430 INFO L225 Difference]: With dead ends: 54 [2020-11-29 19:54:57,430 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 19:54:57,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-11-29 19:54:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 19:54:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-11-29 19:54:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 19:54:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-29 19:54:57,435 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2020-11-29 19:54:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:57,436 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-29 19:54:57,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 19:54:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-29 19:54:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 19:54:57,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:57,437 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:57,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 19:54:57,649 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash 204528949, now seen corresponding path program 16 times [2020-11-29 19:54:57,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:57,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107264374] [2020-11-29 19:54:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:57,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107264374] [2020-11-29 19:54:57,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957582538] [2020-11-29 19:54:57,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:54:57,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 19:54:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:54:57,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 19:54:57,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:54:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:58,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:54:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 19:54:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758167014] [2020-11-29 19:54:58,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 19:54:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:54:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 19:54:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:54:58,034 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2020-11-29 19:54:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:54:58,122 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-11-29 19:54:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 19:54:58,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-11-29 19:54:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:54:58,124 INFO L225 Difference]: With dead ends: 56 [2020-11-29 19:54:58,124 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:54:58,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-29 19:54:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:54:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-11-29 19:54:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 19:54:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-11-29 19:54:58,129 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2020-11-29 19:54:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:54:58,129 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-11-29 19:54:58,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 19:54:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-11-29 19:54:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 19:54:58,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:54:58,130 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:54:58,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 19:54:58,345 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:54:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:54:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -954778893, now seen corresponding path program 17 times [2020-11-29 19:54:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:54:58,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44360821] [2020-11-29 19:54:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:54:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:54:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:54:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44360821] [2020-11-29 19:54:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308871177] [2020-11-29 19:54:58,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:00,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-29 19:55:00,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:55:00,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 19:55:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:55:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:55:00,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:55:00,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 19:55:00,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258034586] [2020-11-29 19:55:00,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 19:55:00,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:55:00,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 19:55:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:55:00,997 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 21 states. [2020-11-29 19:55:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:55:01,092 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-11-29 19:55:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 19:55:01,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-11-29 19:55:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:55:01,093 INFO L225 Difference]: With dead ends: 58 [2020-11-29 19:55:01,093 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 19:55:01,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-11-29 19:55:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 19:55:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-11-29 19:55:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 19:55:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-29 19:55:01,098 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2020-11-29 19:55:01,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:55:01,099 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-29 19:55:01,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 19:55:01,099 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-29 19:55:01,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 19:55:01,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:55:01,100 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:55:01,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:01,300 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:55:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:55:01,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1641881905, now seen corresponding path program 18 times [2020-11-29 19:55:01,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:55:01,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826082384] [2020-11-29 19:55:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:55:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:55:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:55:01,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826082384] [2020-11-29 19:55:01,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962925740] [2020-11-29 19:55:01,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:08,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 19:55:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:55:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:55:08,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:55:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:55:08,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:55:08,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 19:55:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798988816] [2020-11-29 19:55:08,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 19:55:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:55:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 19:55:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:55:08,136 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 22 states. [2020-11-29 19:55:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:55:08,221 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-29 19:55:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 19:55:08,221 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-11-29 19:55:08,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:55:08,222 INFO L225 Difference]: With dead ends: 60 [2020-11-29 19:55:08,222 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 19:55:08,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-11-29 19:55:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 19:55:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-11-29 19:55:08,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 19:55:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-11-29 19:55:08,227 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2020-11-29 19:55:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:55:08,227 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-11-29 19:55:08,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 19:55:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-11-29 19:55:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 19:55:08,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:55:08,228 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:55:08,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:08,429 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:55:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:55:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1656909807, now seen corresponding path program 19 times [2020-11-29 19:55:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:55:08,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829089723] [2020-11-29 19:55:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:55:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:55:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:55:08,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829089723] [2020-11-29 19:55:08,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717515067] [2020-11-29 19:55:08,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:55:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:55:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:55:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:55:08,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:55:08,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-29 19:55:08,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919675902] [2020-11-29 19:55:08,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 19:55:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:55:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 19:55:08,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:55:08,941 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2020-11-29 19:55:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:55:09,046 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-11-29 19:55:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 19:55:09,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-11-29 19:55:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:55:09,048 INFO L225 Difference]: With dead ends: 61 [2020-11-29 19:55:09,048 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 19:55:09,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-29 19:55:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 19:55:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-11-29 19:55:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 19:55:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-11-29 19:55:09,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-11-29 19:55:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:55:09,053 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-11-29 19:55:09,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 19:55:09,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-11-29 19:55:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 19:55:09,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:55:09,054 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:55:09,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:09,268 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:55:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:55:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1081145555, now seen corresponding path program 20 times [2020-11-29 19:55:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:55:09,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527650855] [2020-11-29 19:55:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:55:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:55:09,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:55:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:55:09,570 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:55:09,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:55:09,616 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:55:09,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-29 19:55:09,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:55:09 BoogieIcfgContainer [2020-11-29 19:55:09,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:55:09,722 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:55:09,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:55:09,723 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:55:09,723 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:54:44" (3/4) ... [2020-11-29 19:55:09,725 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:55:09,821 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ede50bee-c73b-4dcf-9e5b-749595848d11/bin/uautomizer/witness.graphml [2020-11-29 19:55:09,821 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:55:09,823 INFO L168 Benchmark]: Toolchain (without parser) took 26240.61 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 62.8 MB in the beginning and 105.5 MB in the end (delta: -42.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:09,824 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:09,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.23 ms. Allocated memory is still 92.3 MB. Free memory was 62.8 MB in the beginning and 70.2 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:09,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:09,825 INFO L168 Benchmark]: Boogie Preprocessor took 26.82 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:09,826 INFO L168 Benchmark]: RCFGBuilder took 637.47 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 53.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:09,826 INFO L168 Benchmark]: TraceAbstraction took 25068.41 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 53.2 MB in the beginning and 110.8 MB in the end (delta: -57.6 MB). Peak memory consumption was 63.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:09,827 INFO L168 Benchmark]: Witness Printer took 99.09 ms. Allocated memory is still 134.2 MB. Free memory was 109.7 MB in the beginning and 105.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:09,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 92.3 MB. Free memory was 51.8 MB in the beginning and 51.7 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 354.23 ms. Allocated memory is still 92.3 MB. Free memory was 62.8 MB in the beginning and 70.2 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.42 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.82 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 67.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 637.47 ms. Allocated memory is still 92.3 MB. Free memory was 67.4 MB in the beginning and 53.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25068.41 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 53.2 MB in the beginning and 110.8 MB in the end (delta: -57.6 MB). Peak memory consumption was 63.5 MB. Max. memory is 16.1 GB. * Witness Printer took 99.09 ms. Allocated memory is still 134.2 MB. Free memory was 109.7 MB in the beginning and 105.5 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: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] COND TRUE !check(ad1, i) [L3] __assert_fail("0", "test24-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 24.8s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 210 SDslu, 1590 SDs, 0 SdLazy, 630 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 13.2s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1250 NumberOfCodeBlocks, 1250 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1159 ConstructedInterpolants, 0 QuantifiedInterpolants, 95961 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...