./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa --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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:21:28,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:21:28,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:21:28,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:21:28,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:21:28,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:21:28,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:21:28,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:21:28,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:21:28,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:21:28,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:21:28,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:21:28,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:21:28,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:21:28,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:21:28,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:21:28,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:21:28,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:21:28,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:21:28,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:21:28,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:21:28,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:21:28,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:21:28,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:21:28,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:21:28,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:21:28,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:21:28,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:21:28,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:21:28,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:21:28,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:21:28,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:21:28,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:21:28,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:21:28,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:21:28,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:21:28,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:21:28,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:21:28,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:21:28,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:21:28,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:21:28,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:21:28,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:21:28,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:21:28,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:21:28,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:21:28,224 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:21:28,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:21:28,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:21:28,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:21:28,225 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:21:28,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:21:28,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:21:28,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:21:28,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:21:28,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:21:28,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:21:28,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:21:28,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:21:28,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:21:28,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:21:28,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:21:28,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:21:28,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:21:28,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:21:28,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:21:28,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:21:28,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:21:28,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:21:28,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:21:28,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:21:28,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:21:28,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:21:28,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:21:28,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:21:28,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:21:28,230 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_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2021-12-07 00:21:28,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:21:28,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:21:28,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:21:28,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:21:28,432 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:21:28,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops/n.c24.i [2021-12-07 00:21:28,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/data/795371f1e/8a16ae4ff7924592a71d5af8b4cf621a/FLAG8eb55641b [2021-12-07 00:21:28,876 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:21:28,876 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/sv-benchmarks/c/loops/n.c24.i [2021-12-07 00:21:28,883 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/data/795371f1e/8a16ae4ff7924592a71d5af8b4cf621a/FLAG8eb55641b [2021-12-07 00:21:28,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/data/795371f1e/8a16ae4ff7924592a71d5af8b4cf621a [2021-12-07 00:21:28,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:21:28,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:21:28,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:21:28,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:21:28,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:21:28,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:21:28" (1/1) ... [2021-12-07 00:21:28,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304568f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:28, skipping insertion in model container [2021-12-07 00:21:28,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:21:28" (1/1) ... [2021-12-07 00:21:28,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:21:28,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:21:29,044 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-12-07 00:21:29,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:21:29,080 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:21:29,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/sv-benchmarks/c/loops/n.c24.i[805,818] [2021-12-07 00:21:29,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:21:29,116 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:21:29,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29 WrapperNode [2021-12-07 00:21:29,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:21:29,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:21:29,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:21:29,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:21:29,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,150 INFO L137 Inliner]: procedures = 68, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 146 [2021-12-07 00:21:29,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:21:29,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:21:29,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:21:29,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:21:29,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:21:29,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:21:29,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:21:29,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:21:29,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (1/1) ... [2021-12-07 00:21:29,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:21:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:29,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:21:29,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:21:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:21:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-07 00:21:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:21:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:21:29,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:21:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:21:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:21:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-07 00:21:29,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:21:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:21:29,310 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:21:29,311 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:21:29,466 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:21:29,470 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:21:29,471 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 00:21:29,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:21:29 BoogieIcfgContainer [2021-12-07 00:21:29,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:21:29,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:21:29,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:21:29,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:21:29,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:21:28" (1/3) ... [2021-12-07 00:21:29,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285a3923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:21:29, skipping insertion in model container [2021-12-07 00:21:29,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:21:29" (2/3) ... [2021-12-07 00:21:29,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285a3923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:21:29, skipping insertion in model container [2021-12-07 00:21:29,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:21:29" (3/3) ... [2021-12-07 00:21:29,479 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c24.i [2021-12-07 00:21:29,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:21:29,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:21:29,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:21:29,525 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:21:29,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:21:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-07 00:21:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:29,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:29,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash 214843119, now seen corresponding path program 1 times [2021-12-07 00:21:29,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101338452] [2021-12-07 00:21:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:29,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:21:29,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101338452] [2021-12-07 00:21:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101338452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:21:29,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:21:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:21:29,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077967717] [2021-12-07 00:21:29,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:21:29,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:21:29,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:29,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:21:29,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:21:29,704 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.625) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:29,747 INFO L93 Difference]: Finished difference Result 90 states and 141 transitions. [2021-12-07 00:21:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:21:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-07 00:21:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:29,755 INFO L225 Difference]: With dead ends: 90 [2021-12-07 00:21:29,755 INFO L226 Difference]: Without dead ends: 53 [2021-12-07 00:21:29,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:21:29,760 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:21:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-07 00:21:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2021-12-07 00:21:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-12-07 00:21:29,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 8 [2021-12-07 00:21:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:29,786 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-12-07 00:21:29,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-12-07 00:21:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 00:21:29,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:29,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:29,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:21:29,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:29,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash 979779318, now seen corresponding path program 1 times [2021-12-07 00:21:29,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489849426] [2021-12-07 00:21:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:29,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:21:29,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489849426] [2021-12-07 00:21:29,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489849426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:29,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688012638] [2021-12-07 00:21:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:29,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:29,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:29,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:29,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:21:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:21:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:21:29,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:21:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688012638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:29,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:29,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-07 00:21:29,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802405165] [2021-12-07 00:21:29,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:29,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:21:29,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:29,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:21:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:21:29,976 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:30,040 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2021-12-07 00:21:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:21:30,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-07 00:21:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:30,041 INFO L225 Difference]: With dead ends: 128 [2021-12-07 00:21:30,041 INFO L226 Difference]: Without dead ends: 101 [2021-12-07 00:21:30,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:21:30,043 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:30,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 116 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:21:30,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-07 00:21:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-07 00:21:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.38) internal successors, (138), 100 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2021-12-07 00:21:30,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 15 [2021-12-07 00:21:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:30,055 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2021-12-07 00:21:30,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2021-12-07 00:21:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-07 00:21:30,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:30,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:30,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:21:30,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:30,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash -15587406, now seen corresponding path program 2 times [2021-12-07 00:21:30,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22637091] [2021-12-07 00:21:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:30,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-07 00:21:30,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:30,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22637091] [2021-12-07 00:21:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22637091] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:21:30,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:21:30,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:21:30,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299862679] [2021-12-07 00:21:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:21:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:21:30,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:21:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:21:30,455 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:30,480 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2021-12-07 00:21:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:21:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-07 00:21:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:30,482 INFO L225 Difference]: With dead ends: 187 [2021-12-07 00:21:30,482 INFO L226 Difference]: Without dead ends: 183 [2021-12-07 00:21:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:21:30,484 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:30,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 111 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:21:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-07 00:21:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2021-12-07 00:21:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.386138613861386) internal successors, (140), 101 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2021-12-07 00:21:30,496 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 36 [2021-12-07 00:21:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:30,497 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2021-12-07 00:21:30,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2021-12-07 00:21:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 00:21:30,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:30,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:21:30,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -569704896, now seen corresponding path program 1 times [2021-12-07 00:21:30,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349743463] [2021-12-07 00:21:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:30,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-07 00:21:30,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:30,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349743463] [2021-12-07 00:21:30,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349743463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:30,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629200930] [2021-12-07 00:21:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:30,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:30,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:30,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:30,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:21:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:30,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:21:30,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-07 00:21:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-07 00:21:30,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629200930] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:30,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:30,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-07 00:21:30,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620269417] [2021-12-07 00:21:30,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:30,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:21:30,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:21:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:21:30,759 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:30,887 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2021-12-07 00:21:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:21:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-07 00:21:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:30,889 INFO L225 Difference]: With dead ends: 351 [2021-12-07 00:21:30,890 INFO L226 Difference]: Without dead ends: 260 [2021-12-07 00:21:30,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:21:30,892 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 653 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:30,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 280 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:21:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-07 00:21:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2021-12-07 00:21:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 332 transitions. [2021-12-07 00:21:30,920 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 332 transitions. Word has length 41 [2021-12-07 00:21:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:30,920 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 332 transitions. [2021-12-07 00:21:30,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 332 transitions. [2021-12-07 00:21:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 00:21:30,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:30,925 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:30,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:21:31,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:31,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:31,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:31,130 INFO L85 PathProgramCache]: Analyzing trace with hash 663811572, now seen corresponding path program 2 times [2021-12-07 00:21:31,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:31,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048782825] [2021-12-07 00:21:31,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:31,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-07 00:21:31,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:31,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048782825] [2021-12-07 00:21:31,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048782825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559641379] [2021-12-07 00:21:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:21:31,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:31,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:31,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:21:31,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:21:31,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:21:31,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 00:21:31,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-07 00:21:31,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-07 00:21:31,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559641379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:31,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:31,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-07 00:21:31,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273645346] [2021-12-07 00:21:31,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:31,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:21:31,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:31,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:21:31,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:21:31,723 INFO L87 Difference]: Start difference. First operand 240 states and 332 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:32,012 INFO L93 Difference]: Finished difference Result 771 states and 1098 transitions. [2021-12-07 00:21:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:21:32,013 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-07 00:21:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:32,017 INFO L225 Difference]: With dead ends: 771 [2021-12-07 00:21:32,017 INFO L226 Difference]: Without dead ends: 554 [2021-12-07 00:21:32,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:21:32,020 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2440 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:32,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2440 Valid, 544 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:21:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-12-07 00:21:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 516. [2021-12-07 00:21:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.3902912621359222) internal successors, (716), 515 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 716 transitions. [2021-12-07 00:21:32,056 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 716 transitions. Word has length 83 [2021-12-07 00:21:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:32,056 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 716 transitions. [2021-12-07 00:21:32,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:32,056 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 716 transitions. [2021-12-07 00:21:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-07 00:21:32,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:32,062 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:32,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:21:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:32,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1319385436, now seen corresponding path program 3 times [2021-12-07 00:21:32,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054853837] [2021-12-07 00:21:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:32,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2021-12-07 00:21:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054853837] [2021-12-07 00:21:32,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054853837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:32,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138927417] [2021-12-07 00:21:32,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:21:32,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:32,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:32,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:21:32,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:21:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:21:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:21:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2021-12-07 00:21:32,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2021-12-07 00:21:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138927417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:33,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:33,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-07 00:21:33,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140182756] [2021-12-07 00:21:33,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:33,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 00:21:33,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 00:21:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2021-12-07 00:21:33,166 INFO L87 Difference]: Start difference. First operand 516 states and 716 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:36,895 INFO L93 Difference]: Finished difference Result 2608 states and 3704 transitions. [2021-12-07 00:21:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-12-07 00:21:36,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-12-07 00:21:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:36,905 INFO L225 Difference]: With dead ends: 2608 [2021-12-07 00:21:36,905 INFO L226 Difference]: Without dead ends: 2133 [2021-12-07 00:21:36,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 398 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11154 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8185, Invalid=22265, Unknown=0, NotChecked=0, Total=30450 [2021-12-07 00:21:36,916 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 12678 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12678 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:36,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12678 Valid, 672 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:21:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-12-07 00:21:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 590. [2021-12-07 00:21:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.4023769100169778) internal successors, (826), 589 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 826 transitions. [2021-12-07 00:21:36,949 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 826 transitions. Word has length 167 [2021-12-07 00:21:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:36,950 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 826 transitions. [2021-12-07 00:21:36,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 826 transitions. [2021-12-07 00:21:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-07 00:21:36,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:36,952 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:36,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:21:37,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:37,154 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash 914783370, now seen corresponding path program 4 times [2021-12-07 00:21:37,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817698949] [2021-12-07 00:21:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:37,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-07 00:21:37,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:37,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817698949] [2021-12-07 00:21:37,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817698949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:37,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460666023] [2021-12-07 00:21:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:21:37,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:37,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:21:37,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:21:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:21:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:21:37,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-07 00:21:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-07 00:21:38,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460666023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:38,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:38,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-07 00:21:38,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974840001] [2021-12-07 00:21:38,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-07 00:21:38,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-07 00:21:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 00:21:38,327 INFO L87 Difference]: Start difference. First operand 590 states and 826 transitions. Second operand has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:21:39,272 INFO L93 Difference]: Finished difference Result 3058 states and 4504 transitions. [2021-12-07 00:21:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-07 00:21:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-12-07 00:21:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:21:39,283 INFO L225 Difference]: With dead ends: 3058 [2021-12-07 00:21:39,283 INFO L226 Difference]: Without dead ends: 2517 [2021-12-07 00:21:39,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 00:21:39,285 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 4625 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4625 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:21:39,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4625 Valid, 1212 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:21:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-12-07 00:21:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1165. [2021-12-07 00:21:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 1.3969072164948453) internal successors, (1626), 1164 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1626 transitions. [2021-12-07 00:21:39,343 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1626 transitions. Word has length 189 [2021-12-07 00:21:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:21:39,344 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1626 transitions. [2021-12-07 00:21:39,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1626 transitions. [2021-12-07 00:21:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-12-07 00:21:39,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:21:39,348 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:39,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:21:39,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:39,550 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:21:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash 892851466, now seen corresponding path program 5 times [2021-12-07 00:21:39,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:39,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721509030] [2021-12-07 00:21:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:39,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-07 00:21:40,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721509030] [2021-12-07 00:21:40,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721509030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789088959] [2021-12-07 00:21:40,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:21:40,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:40,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:40,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:22:00,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-07 00:22:00,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:22:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-07 00:22:00,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:22:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-07 00:22:00,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:22:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8214 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 5910 trivial. 0 not checked. [2021-12-07 00:22:02,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789088959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:22:02,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:22:02,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-07 00:22:02,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046264013] [2021-12-07 00:22:02,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:22:02,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-07 00:22:02,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:22:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-07 00:22:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 00:22:02,543 INFO L87 Difference]: Start difference. First operand 1165 states and 1626 transitions. Second operand has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:22:10,397 INFO L93 Difference]: Finished difference Result 6083 states and 8954 transitions. [2021-12-07 00:22:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-07 00:22:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2021-12-07 00:22:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:22:10,423 INFO L225 Difference]: With dead ends: 6083 [2021-12-07 00:22:10,423 INFO L226 Difference]: Without dead ends: 5017 [2021-12-07 00:22:10,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 00:22:10,428 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 10074 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10074 SdHoareTripleChecker+Valid, 2404 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:22:10,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10074 Valid, 2404 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 00:22:10,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2021-12-07 00:22:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 2315. [2021-12-07 00:22:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2314 states have (on average 1.3941227312013829) internal successors, (3226), 2314 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3226 transitions. [2021-12-07 00:22:10,546 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3226 transitions. Word has length 364 [2021-12-07 00:22:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:22:10,546 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3226 transitions. [2021-12-07 00:22:10,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.128712871287129) internal successors, (215), 101 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3226 transitions. [2021-12-07 00:22:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 715 [2021-12-07 00:22:10,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:22:10,563 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:22:10,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:22:10,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:22:10,764 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:22:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:22:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1941301934, now seen corresponding path program 6 times [2021-12-07 00:22:10,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:22:10,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069101171] [2021-12-07 00:22:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:22:10,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:22:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:22:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 24285 trivial. 0 not checked. [2021-12-07 00:22:13,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:22:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069101171] [2021-12-07 00:22:13,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069101171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:22:13,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76131346] [2021-12-07 00:22:13,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:22:13,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:22:13,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:22:13,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:22:13,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:22:13,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-07 00:22:13,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:22:13,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:22:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:22:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2021-12-07 00:22:13,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:22:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33889 backedges. 680 proven. 34 refuted. 0 times theorem prover too weak. 33175 trivial. 0 not checked. [2021-12-07 00:22:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76131346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:22:14,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:22:14,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 114 [2021-12-07 00:22:14,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705582268] [2021-12-07 00:22:14,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:22:14,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-12-07 00:22:14,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:22:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-12-07 00:22:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5124, Invalid=7758, Unknown=0, NotChecked=0, Total=12882 [2021-12-07 00:22:14,625 INFO L87 Difference]: Start difference. First operand 2315 states and 3226 transitions. Second operand has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:31:07,682 INFO L93 Difference]: Finished difference Result 23013 states and 33038 transitions. [2021-12-07 00:31:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2021-12-07 00:31:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 714 [2021-12-07 00:31:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:31:07,762 INFO L225 Difference]: With dead ends: 23013 [2021-12-07 00:31:07,763 INFO L226 Difference]: Without dead ends: 20885 [2021-12-07 00:31:07,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3629 GetRequests, 2017 SyntacticMatches, 1 SemanticMatches, 1611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213243 ImplicationChecksByTransitivity, 183.4s TimeCoverageRelationStatistics Valid=622974, Invalid=1977182, Unknown=0, NotChecked=0, Total=2600156 [2021-12-07 00:31:07,950 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 204931 mSDsluCounter, 2357 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 15577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204931 SdHoareTripleChecker+Valid, 2387 SdHoareTripleChecker+Invalid, 16832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 15577 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:31:07,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204931 Valid, 2387 Invalid, 16832 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [15577 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-12-07 00:31:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20885 states. [2021-12-07 00:31:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20885 to 2440. [2021-12-07 00:31:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.3997539975399753) internal successors, (3414), 2439 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3414 transitions. [2021-12-07 00:31:08,195 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3414 transitions. Word has length 714 [2021-12-07 00:31:08,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:31:08,196 INFO L470 AbstractCegarLoop]: Abstraction has 2440 states and 3414 transitions. [2021-12-07 00:31:08,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.412280701754386) internal successors, (275), 114 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3414 transitions. [2021-12-07 00:31:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2021-12-07 00:31:08,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:31:08,203 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:31:08,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:31:08,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:31:08,404 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:31:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:31:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1505500494, now seen corresponding path program 7 times [2021-12-07 00:31:08,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:31:08,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408389318] [2021-12-07 00:31:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:31:08,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:31:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:31:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-07 00:31:10,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:31:10,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408389318] [2021-12-07 00:31:10,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408389318] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:31:10,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547283717] [2021-12-07 00:31:10,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:31:10,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:31:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:31:10,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:31:10,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:31:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:31:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-07 00:31:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:31:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-07 00:31:11,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:31:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 35370 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 25569 trivial. 0 not checked. [2021-12-07 00:31:17,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547283717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:31:17,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:31:17,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-07 00:31:17,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032500219] [2021-12-07 00:31:17,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:31:17,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-07 00:31:17,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:31:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-07 00:31:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-07 00:31:17,526 INFO L87 Difference]: Start difference. First operand 2440 states and 3414 transitions. Second operand has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:56,042 INFO L93 Difference]: Finished difference Result 22760 states and 34100 transitions. [2021-12-07 00:32:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-07 00:32:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 751 [2021-12-07 00:32:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:56,070 INFO L225 Difference]: With dead ends: 22760 [2021-12-07 00:32:56,070 INFO L226 Difference]: Without dead ends: 20521 [2021-12-07 00:32:56,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1602 GetRequests, 1401 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-07 00:32:56,079 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29184 mSDsluCounter, 4796 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29184 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:56,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29184 Valid, 4828 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-07 00:32:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2021-12-07 00:32:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 4763. [2021-12-07 00:32:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 1.3956320873582528) internal successors, (6646), 4762 states have internal predecessors, (6646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 6646 transitions. [2021-12-07 00:32:56,514 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 6646 transitions. Word has length 751 [2021-12-07 00:32:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 4763 states and 6646 transitions. [2021-12-07 00:32:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.064039408866995) internal successors, (419), 203 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 6646 transitions. [2021-12-07 00:32:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1459 [2021-12-07 00:32:56,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:56,529 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 200, 200, 200, 200, 200, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:56,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:32:56,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:32:56,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:32:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -605204102, now seen corresponding path program 8 times [2021-12-07 00:32:56,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:32:56,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900349684] [2021-12-07 00:32:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:56,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:32:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-07 00:33:05,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:33:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900349684] [2021-12-07 00:33:05,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900349684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566453665] [2021-12-07 00:33:05,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:33:05,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:33:05,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:33:05,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:33:05,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_888b9800-2136-4585-af35-151125de8291/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:33:06,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:33:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:33:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 5528 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-07 00:33:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-07 00:33:07,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 141925 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 101925 trivial. 0 not checked. [2021-12-07 00:33:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566453665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:33:31,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:33:31,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2021-12-07 00:33:31,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793795606] [2021-12-07 00:33:31,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:31,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-12-07 00:33:31,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:33:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-12-07 00:33:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2021-12-07 00:33:31,350 INFO L87 Difference]: Start difference. First operand 4763 states and 6646 transitions. Second operand has 405 states, 405 states have (on average 2.0320987654320986) internal successors, (823), 405 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)