./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 d709c141e865b9e316ae50970f4a7a44b0dfd8eb ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.2.0-69874e2 [2020-12-01 15:31:58,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:31:58,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:31:58,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:31:58,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:31:58,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:31:58,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:31:58,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:31:58,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:31:58,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:31:58,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:31:58,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:31:58,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:31:58,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:31:58,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:31:58,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:31:58,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:31:58,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:31:58,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:31:58,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:31:58,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:31:58,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:31:58,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:31:58,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:31:58,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:31:58,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:31:58,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:31:58,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:31:58,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:31:58,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:31:58,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:31:58,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:31:58,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:31:58,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:31:58,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:31:58,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:31:58,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:31:58,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:31:58,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:31:58,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:31:58,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:31:58,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:31:58,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:31:58,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:31:58,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:31:58,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:31:58,196 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:31:58,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:31:58,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:31:58,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:31:58,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:31:58,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:31:58,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:31:58,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:31:58,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:31:58,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:31:58,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:31:58,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:31:58,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:31:58,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:31:58,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:31:58,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:31:58,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:31:58,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:31:58,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:31:58,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:31:58,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:31:58,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:31:58,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:31:58,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:31:58,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:31:58,201 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_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d709c141e865b9e316ae50970f4a7a44b0dfd8eb [2020-12-01 15:31:58,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:31:58,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:31:58,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:31:58,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:31:58,496 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:31:58,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-12-01 15:31:58,578 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/data/eba509c24/8e277cd939f8472bb96de1077e955775/FLAG3c8e9c054 [2020-12-01 15:31:59,255 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:31:59,256 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/sv-benchmarks/c/recursive-simple/sum_20x0-1.c [2020-12-01 15:31:59,262 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/data/eba509c24/8e277cd939f8472bb96de1077e955775/FLAG3c8e9c054 [2020-12-01 15:31:59,628 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/data/eba509c24/8e277cd939f8472bb96de1077e955775 [2020-12-01 15:31:59,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:31:59,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:31:59,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:31:59,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:31:59,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:31:59,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c7390f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59, skipping insertion in model container [2020-12-01 15:31:59,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:31:59,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:31:59,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:31:59,861 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:31:59,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:31:59,909 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:31:59,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59 WrapperNode [2020-12-01 15:31:59,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:31:59,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:31:59,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:31:59,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:31:59,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:31:59,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:31:59,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:31:59,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:31:59,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... [2020-12-01 15:31:59,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:31:59,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:31:59,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:31:59,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:31:59,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:32:00,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:32:00,085 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-01 15:32:00,086 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-01 15:32:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:32:00,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:32:00,301 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:32:00,301 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:32:00,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:32:00 BoogieIcfgContainer [2020-12-01 15:32:00,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:32:00,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:32:00,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:32:00,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:32:00,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:31:59" (1/3) ... [2020-12-01 15:32:00,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513b65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:32:00, skipping insertion in model container [2020-12-01 15:32:00,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:31:59" (2/3) ... [2020-12-01 15:32:00,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4513b65b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:32:00, skipping insertion in model container [2020-12-01 15:32:00,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:32:00" (3/3) ... [2020-12-01 15:32:00,313 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_20x0-1.c [2020-12-01 15:32:00,329 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:32:00,332 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:32:00,345 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:32:00,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:32:00,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:32:00,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:32:00,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:32:00,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:32:00,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:32:00,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:32:00,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:32:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-01 15:32:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:32:00,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:00,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:00,410 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:00,428 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-12-01 15:32:00,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:00,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067502351] [2020-12-01 15:32:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:00,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:32:00,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067502351] [2020-12-01 15:32:00,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:32:00,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:32:00,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577264176] [2020-12-01 15:32:00,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:32:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:00,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:32:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:32:00,714 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-12-01 15:32:00,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:00,784 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-01 15:32:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:32:00,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-01 15:32:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:00,800 INFO L225 Difference]: With dead ends: 26 [2020-12-01 15:32:00,801 INFO L226 Difference]: Without dead ends: 15 [2020-12-01 15:32:00,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:32:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-01 15:32:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-01 15:32:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-01 15:32:00,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-01 15:32:00,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-01 15:32:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:00,871 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-01 15:32:00,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:32:00,871 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-01 15:32:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:32:00,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:00,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:00,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:32:00,875 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-12-01 15:32:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:00,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786968666] [2020-12-01 15:32:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:00,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:32:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786968666] [2020-12-01 15:32:01,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607193119] [2020-12-01 15:32:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:32:01,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:32:01,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:01,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:32:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404567468] [2020-12-01 15:32:01,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:32:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:32:01,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:32:01,301 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-01 15:32:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:01,355 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-01 15:32:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:32:01,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-01 15:32:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:01,357 INFO L225 Difference]: With dead ends: 22 [2020-12-01 15:32:01,357 INFO L226 Difference]: Without dead ends: 18 [2020-12-01 15:32:01,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:32:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-01 15:32:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-01 15:32:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-01 15:32:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-01 15:32:01,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-01 15:32:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:01,365 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-01 15:32:01,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:32:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-01 15:32:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:32:01,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:01,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:01,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:32:01,581 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-12-01 15:32:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:01,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388734375] [2020-12-01 15:32:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:32:01,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388734375] [2020-12-01 15:32:01,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700800939] [2020-12-01 15:32:01,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:01,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:32:01,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:01,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:32:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:32:01,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:01,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-01 15:32:01,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455610987] [2020-12-01 15:32:01,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:32:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:32:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:32:01,915 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-01 15:32:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:01,994 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-01 15:32:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:32:01,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-01 15:32:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:01,996 INFO L225 Difference]: With dead ends: 25 [2020-12-01 15:32:01,996 INFO L226 Difference]: Without dead ends: 21 [2020-12-01 15:32:01,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:32:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-01 15:32:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-01 15:32:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-01 15:32:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-01 15:32:02,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-01 15:32:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:02,013 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-01 15:32:02,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:32:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-01 15:32:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:32:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:02,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:02,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:02,229 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-12-01 15:32:02,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:02,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821796759] [2020-12-01 15:32:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:02,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:02,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:02,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:02,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-01 15:32:02,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821796759] [2020-12-01 15:32:02,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074418922] [2020-12-01 15:32:02,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:02,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 15:32:02,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:32:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-01 15:32:02,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:02,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-01 15:32:02,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147658317] [2020-12-01 15:32:02,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:32:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:32:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:32:02,765 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-01 15:32:02,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:02,868 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-01 15:32:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:32:02,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-01 15:32:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:02,871 INFO L225 Difference]: With dead ends: 28 [2020-12-01 15:32:02,872 INFO L226 Difference]: Without dead ends: 24 [2020-12-01 15:32:02,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:32:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-01 15:32:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-01 15:32:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 15:32:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-01 15:32:02,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-01 15:32:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:02,884 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-01 15:32:02,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:32:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-01 15:32:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:32:02,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:02,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:03,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:03,105 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-12-01 15:32:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:03,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021711108] [2020-12-01 15:32:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 15:32:03,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021711108] [2020-12-01 15:32:03,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987744533] [2020-12-01 15:32:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:03,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:32:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:32:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 15:32:03,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:03,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-01 15:32:03,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919333783] [2020-12-01 15:32:03,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:32:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:03,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:32:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:32:03,579 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-01 15:32:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:03,676 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-01 15:32:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:32:03,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-01 15:32:03,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:03,686 INFO L225 Difference]: With dead ends: 31 [2020-12-01 15:32:03,686 INFO L226 Difference]: Without dead ends: 27 [2020-12-01 15:32:03,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:32:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-01 15:32:03,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-01 15:32:03,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 15:32:03,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-01 15:32:03,697 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-01 15:32:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:03,698 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-01 15:32:03,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:32:03,698 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-01 15:32:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-01 15:32:03,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:03,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:03,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:03,925 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-12-01 15:32:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:03,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10528536] [2020-12-01 15:32:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:03,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-01 15:32:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10528536] [2020-12-01 15:32:04,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204674556] [2020-12-01 15:32:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:04,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-01 15:32:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:32:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-01 15:32:04,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:04,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-01 15:32:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699824871] [2020-12-01 15:32:04,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:32:04,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:32:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:32:04,417 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-01 15:32:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:04,536 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-01 15:32:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 15:32:04,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-01 15:32:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:04,539 INFO L225 Difference]: With dead ends: 34 [2020-12-01 15:32:04,539 INFO L226 Difference]: Without dead ends: 30 [2020-12-01 15:32:04,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:32:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-01 15:32:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-01 15:32:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-01 15:32:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-01 15:32:04,551 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-01 15:32:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:04,553 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-01 15:32:04,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:32:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-01 15:32:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-01 15:32:04,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:04,557 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:04,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-01 15:32:04,784 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-12-01 15:32:04,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:04,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214751684] [2020-12-01 15:32:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:04,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-01 15:32:05,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214751684] [2020-12-01 15:32:05,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445322580] [2020-12-01 15:32:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:05,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-01 15:32:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:32:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-01 15:32:05,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:05,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-01 15:32:05,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125000295] [2020-12-01 15:32:05,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-01 15:32:05,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:32:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:32:05,287 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-01 15:32:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:05,410 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-01 15:32:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:32:05,410 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-01 15:32:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:05,415 INFO L225 Difference]: With dead ends: 37 [2020-12-01 15:32:05,415 INFO L226 Difference]: Without dead ends: 33 [2020-12-01 15:32:05,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:32:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-01 15:32:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-01 15:32:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-01 15:32:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-01 15:32:05,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-01 15:32:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:05,431 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-01 15:32:05,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-01 15:32:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-01 15:32:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-01 15:32:05,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:05,438 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:05,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:05,661 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-12-01 15:32:05,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:05,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965385684] [2020-12-01 15:32:05,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-01 15:32:05,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965385684] [2020-12-01 15:32:05,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641398669] [2020-12-01 15:32:05,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:32:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-01 15:32:06,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:06,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-01 15:32:06,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520354026] [2020-12-01 15:32:06,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 15:32:06,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:32:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:32:06,190 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-01 15:32:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:06,378 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-01 15:32:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 15:32:06,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-01 15:32:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:06,382 INFO L225 Difference]: With dead ends: 40 [2020-12-01 15:32:06,382 INFO L226 Difference]: Without dead ends: 36 [2020-12-01 15:32:06,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:32:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-01 15:32:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-01 15:32:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-01 15:32:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-01 15:32:06,395 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-01 15:32:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:06,398 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-01 15:32:06,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 15:32:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-01 15:32:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-01 15:32:06,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:06,402 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:06,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:06,617 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:06,619 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-12-01 15:32:06,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:06,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026081875] [2020-12-01 15:32:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-01 15:32:06,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026081875] [2020-12-01 15:32:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746039833] [2020-12-01 15:32:06,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:07,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:32:07,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:07,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-01 15:32:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-01 15:32:07,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:07,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-01 15:32:07,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293544497] [2020-12-01 15:32:07,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-01 15:32:07,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:07,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-01 15:32:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-01 15:32:07,178 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-01 15:32:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:07,349 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-01 15:32:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-01 15:32:07,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-01 15:32:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:07,354 INFO L225 Difference]: With dead ends: 43 [2020-12-01 15:32:07,354 INFO L226 Difference]: Without dead ends: 39 [2020-12-01 15:32:07,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-01 15:32:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-01 15:32:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-01 15:32:07,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-01 15:32:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-01 15:32:07,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-01 15:32:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:07,370 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-01 15:32:07,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-01 15:32:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-01 15:32:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-01 15:32:07,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:07,373 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:07,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-01 15:32:07,587 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:07,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:07,588 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-12-01 15:32:07,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:07,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199370008] [2020-12-01 15:32:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:07,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-01 15:32:08,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199370008] [2020-12-01 15:32:08,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254081584] [2020-12-01 15:32:08,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:08,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-01 15:32:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-01 15:32:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-01 15:32:08,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:08,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-01 15:32:08,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610113461] [2020-12-01 15:32:08,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-01 15:32:08,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-01 15:32:08,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-01 15:32:08,284 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-01 15:32:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:08,480 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-01 15:32:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:32:08,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-01 15:32:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:08,482 INFO L225 Difference]: With dead ends: 46 [2020-12-01 15:32:08,482 INFO L226 Difference]: Without dead ends: 42 [2020-12-01 15:32:08,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:32:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-01 15:32:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-01 15:32:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-01 15:32:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-01 15:32:08,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-01 15:32:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:08,490 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-01 15:32:08,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-01 15:32:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-01 15:32:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-01 15:32:08,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:08,491 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:08,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:08,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-12-01 15:32:08,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:08,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402554421] [2020-12-01 15:32:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:08,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-01 15:32:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402554421] [2020-12-01 15:32:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609960947] [2020-12-01 15:32:09,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:09,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:32:09,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:09,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-01 15:32:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-01 15:32:09,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:09,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-01 15:32:09,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751421323] [2020-12-01 15:32:09,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-01 15:32:09,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:09,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-01 15:32:09,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:32:09,383 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-01 15:32:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:09,593 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-01 15:32:09,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-01 15:32:09,593 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-01 15:32:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:09,595 INFO L225 Difference]: With dead ends: 49 [2020-12-01 15:32:09,595 INFO L226 Difference]: Without dead ends: 45 [2020-12-01 15:32:09,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-01 15:32:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-01 15:32:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-01 15:32:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-01 15:32:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-01 15:32:09,602 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-01 15:32:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:09,602 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-01 15:32:09,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-01 15:32:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-01 15:32:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-01 15:32:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:09,604 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:09,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:09,825 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-12-01 15:32:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:09,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129696398] [2020-12-01 15:32:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:09,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-01 15:32:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129696398] [2020-12-01 15:32:10,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980277956] [2020-12-01 15:32:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:10,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-01 15:32:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-01 15:32:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-01 15:32:10,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:10,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-01 15:32:10,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252259043] [2020-12-01 15:32:10,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 15:32:10,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 15:32:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:32:10,547 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-01 15:32:10,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:10,777 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-01 15:32:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 15:32:10,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-01 15:32:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:10,778 INFO L225 Difference]: With dead ends: 52 [2020-12-01 15:32:10,778 INFO L226 Difference]: Without dead ends: 48 [2020-12-01 15:32:10,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-01 15:32:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-01 15:32:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-01 15:32:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-01 15:32:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-01 15:32:10,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-01 15:32:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:10,786 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-01 15:32:10,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 15:32:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-01 15:32:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-01 15:32:10,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:10,787 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:11,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-01 15:32:11,013 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-12-01 15:32:11,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:11,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105756872] [2020-12-01 15:32:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-01 15:32:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105756872] [2020-12-01 15:32:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816861647] [2020-12-01 15:32:11,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:11,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-01 15:32:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:11,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-01 15:32:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-01 15:32:11,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:11,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-01 15:32:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375891373] [2020-12-01 15:32:11,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-01 15:32:11,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:11,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-01 15:32:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-01 15:32:11,828 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-01 15:32:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:12,071 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-01 15:32:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-01 15:32:12,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-01 15:32:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:12,073 INFO L225 Difference]: With dead ends: 55 [2020-12-01 15:32:12,073 INFO L226 Difference]: Without dead ends: 51 [2020-12-01 15:32:12,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-01 15:32:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-01 15:32:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-01 15:32:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-01 15:32:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-01 15:32:12,081 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-01 15:32:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:12,081 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-01 15:32:12,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-01 15:32:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-01 15:32:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-01 15:32:12,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:12,083 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:12,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-01 15:32:12,304 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-12-01 15:32:12,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:12,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151975372] [2020-12-01 15:32:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-01 15:32:12,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151975372] [2020-12-01 15:32:12,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211354388] [2020-12-01 15:32:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-01 15:32:12,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-01 15:32:13,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:13,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-01 15:32:13,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565435394] [2020-12-01 15:32:13,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-01 15:32:13,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-01 15:32:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-01 15:32:13,182 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-01 15:32:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:13,423 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-01 15:32:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-01 15:32:13,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-01 15:32:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:13,424 INFO L225 Difference]: With dead ends: 58 [2020-12-01 15:32:13,424 INFO L226 Difference]: Without dead ends: 54 [2020-12-01 15:32:13,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-01 15:32:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-01 15:32:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-01 15:32:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-01 15:32:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-01 15:32:13,431 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-01 15:32:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:13,432 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-01 15:32:13,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-01 15:32:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-01 15:32:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-01 15:32:13,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:13,434 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:13,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-01 15:32:13,648 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-12-01 15:32:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:13,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690280582] [2020-12-01 15:32:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-01 15:32:14,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690280582] [2020-12-01 15:32:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981646797] [2020-12-01 15:32:14,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:14,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:32:14,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-01 15:32:14,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-01 15:32:14,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:14,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-01 15:32:14,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97773371] [2020-12-01 15:32:14,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-01 15:32:14,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-01 15:32:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-01 15:32:14,570 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-01 15:32:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:14,854 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-01 15:32:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-01 15:32:14,855 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-01 15:32:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:14,857 INFO L225 Difference]: With dead ends: 61 [2020-12-01 15:32:14,857 INFO L226 Difference]: Without dead ends: 57 [2020-12-01 15:32:14,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-01 15:32:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-01 15:32:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-01 15:32:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-01 15:32:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-01 15:32:14,885 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-01 15:32:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:14,886 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-01 15:32:14,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-01 15:32:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-01 15:32:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-01 15:32:14,889 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:14,889 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:15,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:15,116 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-12-01 15:32:15,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:15,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626782320] [2020-12-01 15:32:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-01 15:32:15,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626782320] [2020-12-01 15:32:15,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887208356] [2020-12-01 15:32:15,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:15,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-01 15:32:15,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-01 15:32:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-01 15:32:16,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:16,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-01 15:32:16,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167359830] [2020-12-01 15:32:16,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-01 15:32:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-01 15:32:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-12-01 15:32:16,168 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-12-01 15:32:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:16,439 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-01 15:32:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-01 15:32:16,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-12-01 15:32:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:16,440 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:32:16,441 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:32:16,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-12-01 15:32:16,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:32:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-01 15:32:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-01 15:32:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-01 15:32:16,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-01 15:32:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:16,447 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-01 15:32:16,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-01 15:32:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-01 15:32:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-01 15:32:16,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:16,449 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:16,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-01 15:32:16,676 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash 35426954, now seen corresponding path program 16 times [2020-12-01 15:32:16,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:16,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027849796] [2020-12-01 15:32:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:16,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-01 15:32:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027849796] [2020-12-01 15:32:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258841904] [2020-12-01 15:32:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:17,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:32:17,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-01 15:32:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-01 15:32:17,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:17,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-01 15:32:17,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430144086] [2020-12-01 15:32:17,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-01 15:32:17,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:17,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-01 15:32:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-12-01 15:32:17,658 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-12-01 15:32:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:17,960 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-01 15:32:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-01 15:32:17,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-12-01 15:32:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:17,961 INFO L225 Difference]: With dead ends: 67 [2020-12-01 15:32:17,961 INFO L226 Difference]: Without dead ends: 63 [2020-12-01 15:32:17,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-12-01 15:32:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-01 15:32:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-01 15:32:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 15:32:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-01 15:32:17,968 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-12-01 15:32:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:17,968 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-01 15:32:17,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-01 15:32:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-01 15:32:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-01 15:32:17,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:17,970 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:18,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-01 15:32:18,180 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1604689196, now seen corresponding path program 17 times [2020-12-01 15:32:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:18,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189327497] [2020-12-01 15:32:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-01 15:32:18,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189327497] [2020-12-01 15:32:18,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965486024] [2020-12-01 15:32:18,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:19,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-01 15:32:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-01 15:32:19,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-01 15:32:19,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:19,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-01 15:32:19,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391270515] [2020-12-01 15:32:19,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-01 15:32:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-01 15:32:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-01 15:32:19,335 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-12-01 15:32:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:19,670 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-01 15:32:19,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-01 15:32:19,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-12-01 15:32:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:19,674 INFO L225 Difference]: With dead ends: 70 [2020-12-01 15:32:19,674 INFO L226 Difference]: Without dead ends: 66 [2020-12-01 15:32:19,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-12-01 15:32:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-01 15:32:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-01 15:32:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-01 15:32:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-01 15:32:19,682 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-12-01 15:32:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:19,683 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-01 15:32:19,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-01 15:32:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-01 15:32:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-01 15:32:19,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:19,685 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:19,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-01 15:32:19,899 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:19,899 INFO L82 PathProgramCache]: Analyzing trace with hash 427935434, now seen corresponding path program 18 times [2020-12-01 15:32:19,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:19,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796430883] [2020-12-01 15:32:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:19,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-01 15:32:20,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796430883] [2020-12-01 15:32:20,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702954549] [2020-12-01 15:32:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:20,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-01 15:32:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:32:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-01 15:32:20,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-01 15:32:22,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:22,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43] total 63 [2020-12-01 15:32:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390801390] [2020-12-01 15:32:22,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-01 15:32:22,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-01 15:32:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=3286, Unknown=0, NotChecked=0, Total=3906 [2020-12-01 15:32:22,670 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 63 states. [2020-12-01 15:32:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:24,252 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-01 15:32:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-01 15:32:24,253 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 118 [2020-12-01 15:32:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:24,254 INFO L225 Difference]: With dead ends: 73 [2020-12-01 15:32:24,254 INFO L226 Difference]: Without dead ends: 69 [2020-12-01 15:32:24,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1855, Invalid=8245, Unknown=0, NotChecked=0, Total=10100 [2020-12-01 15:32:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-01 15:32:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-01 15:32:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-01 15:32:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-01 15:32:24,261 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-12-01 15:32:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:24,262 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-01 15:32:24,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-01 15:32:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-01 15:32:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-01 15:32:24,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:24,264 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:24,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:24,480 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash 653428628, now seen corresponding path program 19 times [2020-12-01 15:32:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:24,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529996937] [2020-12-01 15:32:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:24,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:32:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-01 15:32:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529996937] [2020-12-01 15:32:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930965489] [2020-12-01 15:32:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/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 [2020-12-01 15:32:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:32:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-01 15:32:25,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:32:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-01 15:32:25,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:32:25,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-01 15:32:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641508206] [2020-12-01 15:32:25,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-01 15:32:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:32:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-01 15:32:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-12-01 15:32:25,818 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-12-01 15:32:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:32:26,151 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-01 15:32:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-01 15:32:26,152 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-12-01 15:32:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:32:26,153 INFO L225 Difference]: With dead ends: 76 [2020-12-01 15:32:26,154 INFO L226 Difference]: Without dead ends: 72 [2020-12-01 15:32:26,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-12-01 15:32:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-01 15:32:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-01 15:32:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-01 15:32:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-01 15:32:26,160 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-12-01 15:32:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:32:26,161 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-01 15:32:26,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-01 15:32:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-01 15:32:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-01 15:32:26,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:32:26,163 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:32:26,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:32:26,376 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:32:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:32:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash -693736694, now seen corresponding path program 20 times [2020-12-01 15:32:26,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:32:26,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385028268] [2020-12-01 15:32:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:32:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:32:26,431 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:32:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:32:26,493 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:32:26,547 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:32:26,547 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:32:26,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-01 15:32:26,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:32:26 BoogieIcfgContainer [2020-12-01 15:32:26,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:32:26,697 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:32:26,697 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:32:26,697 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:32:26,698 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:32:00" (3/4) ... [2020-12-01 15:32:26,700 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:32:26,816 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ada4ddee-3f9c-49c7-a2b6-f8b8ad0eb0ec/bin/uautomizer/witness.graphml [2020-12-01 15:32:26,817 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:32:26,819 INFO L168 Benchmark]: Toolchain (without parser) took 27185.31 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 70.3 MB in the beginning and 349.3 MB in the end (delta: -279.0 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:32:26,819 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 59.8 MB in the beginning and 59.7 MB in the end (delta: 37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:32:26,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.04 ms. Allocated memory is still 100.7 MB. Free memory was 70.1 MB in the beginning and 77.6 MB in the end (delta: -7.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:32:26,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.46 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 76.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:32:26,821 INFO L168 Benchmark]: Boogie Preprocessor took 32.58 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 75.4 MB in the end (delta: 870.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:32:26,821 INFO L168 Benchmark]: RCFGBuilder took 311.53 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 64.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:32:26,822 INFO L168 Benchmark]: TraceAbstraction took 26391.25 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 64.2 MB in the beginning and 355.6 MB in the end (delta: -291.4 MB). Peak memory consumption was 216.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:32:26,822 INFO L168 Benchmark]: Witness Printer took 120.03 ms. Allocated memory is still 383.8 MB. Free memory was 355.6 MB in the beginning and 349.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:32:26,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 59.8 MB in the beginning and 59.7 MB in the end (delta: 37.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 277.04 ms. Allocated memory is still 100.7 MB. Free memory was 70.1 MB in the beginning and 77.6 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 42.46 ms. Allocated memory is still 100.7 MB. Free memory was 77.6 MB in the beginning and 76.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.58 ms. Allocated memory is still 100.7 MB. Free memory was 76.3 MB in the beginning and 75.4 MB in the end (delta: 870.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 311.53 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 64.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 26391.25 ms. Allocated memory was 100.7 MB in the beginning and 383.8 MB in the end (delta: 283.1 MB). Free memory was 64.2 MB in the beginning and 355.6 MB in the end (delta: -291.4 MB). Peak memory consumption was 216.9 MB. Max. memory is 16.1 GB. * Witness Printer took 120.03 ms. Allocated memory is still 383.8 MB. Free memory was 355.6 MB in the beginning and 349.3 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 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: [L14] int a = 20; [L15] int b = 0; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=20, m=0, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=19, m=1, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=18, m=2, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=17, m=3, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=16, m=4, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=15, m=5, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=14, m=6, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=13, m=7, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=12, m=8, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=11, m=9, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=10, m=10, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=9, m=11, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=8, m=12, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=7, m=13, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=6, m=14, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=5, m=15, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=4, m=16, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=3, m=17, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=2, m=18, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=1, m=19, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=20, \old(n)=0, \result=20, m=20, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=1, m=19, n=1, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=2, m=18, n=2, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=3, m=17, n=3, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=4, m=16, n=4, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=5, m=15, n=5, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=6, m=14, n=6, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=7, m=13, n=7, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=8, m=12, n=8, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=9, m=11, n=9, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=10, m=10, n=10, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=11, m=9, n=11, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=12, m=8, n=12, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=13, m=7, n=13, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=14, m=6, n=14, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=15, m=5, n=15, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=16, m=4, n=16, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=17, m=3, n=17, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=18, m=2, n=18, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=19, m=1, n=19, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=20, m=0, n=20, sum(n - 1, m + 1)=20] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L3] __assert_fail("0", "sum_20x0-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.1s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 740 SDslu, 914 SDs, 0 SdLazy, 987 SolverSat, 237 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2230 GetRequests, 1693 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 588195 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4522 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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...