./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC --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 0bbcd29b379466a58e055ac550736cd77ce56d9c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:29:28,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:29:28,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:29:28,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:29:28,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:29:28,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:29:28,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:29:28,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:29:28,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:29:28,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:29:28,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:29:28,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:29:28,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:29:28,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:29:28,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:29:28,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:29:28,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:29:28,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:29:28,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:29:28,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:29:28,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:29:28,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:29:28,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:29:28,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:29:28,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:29:28,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:29:28,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:29:28,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:29:28,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:29:28,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:29:28,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:29:28,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:29:28,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:29:28,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:29:28,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:29:28,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:29:28,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:29:28,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:29:28,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:29:28,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:29:28,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:29:28,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:29:28,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:29:28,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:29:28,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:29:28,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:29:28,276 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:29:28,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:29:28,277 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:29:28,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:29:28,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:29:28,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:29:28,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:29:28,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:29:28,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:29:28,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:29:28,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:29:28,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:29:28,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:29:28,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:29:28,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:29:28,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:29:28,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:29:28,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:29:28,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:29:28,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:29:28,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:29:28,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:29:28,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:29:28,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:29:28,289 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_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-10-11 00:29:28,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:29:28,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:29:28,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:29:28,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:29:28,614 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:29:28,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-11 00:29:28,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/data/0e8e08aed/8cd49d0bd8b24631b027a7d7bed50e8e/FLAGab6fb77ff [2021-10-11 00:29:29,166 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:29:29,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-10-11 00:29:29,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/data/0e8e08aed/8cd49d0bd8b24631b027a7d7bed50e8e/FLAGab6fb77ff [2021-10-11 00:29:29,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/data/0e8e08aed/8cd49d0bd8b24631b027a7d7bed50e8e [2021-10-11 00:29:29,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:29:29,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:29:29,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:29,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:29:29,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:29:29,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ca2566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29, skipping insertion in model container [2021-10-11 00:29:29,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:29:29,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:29:29,807 WARN L226 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_3a3f1884-8293-4433-aa97-76884dda4307/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-11 00:29:29,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:29,819 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:29:29,846 WARN L226 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_3a3f1884-8293-4433-aa97-76884dda4307/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2021-10-11 00:29:29,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:29:29,864 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:29:29,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29 WrapperNode [2021-10-11 00:29:29,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:29:29,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:29,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:29:29,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:29:29,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:29:29,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:29:29,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:29:29,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:29:29,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... [2021-10-11 00:29:29,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:29:29,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:29:29,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:29:29,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:29:29,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:29:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:29:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:29:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:29:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:29:30,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:29:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:29:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:29:30,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:29:30,339 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-11 00:29:30,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:30 BoogieIcfgContainer [2021-10-11 00:29:30,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:29:30,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:29:30,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:29:30,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:29:30,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:29:29" (1/3) ... [2021-10-11 00:29:30,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27930411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:30, skipping insertion in model container [2021-10-11 00:29:30,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:29:29" (2/3) ... [2021-10-11 00:29:30,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27930411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:29:30, skipping insertion in model container [2021-10-11 00:29:30,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:30" (3/3) ... [2021-10-11 00:29:30,350 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-10-11 00:29:30,376 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:29:30,380 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:29:30,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:29:30,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:29:30,420 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:29:30,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:29:30,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:29:30,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:29:30,421 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:29:30,421 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:29:30,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:29:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-10-11 00:29:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:29:30,441 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:30,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:30,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:30,448 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-11 00:29:30,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:30,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518354105] [2021-10-11 00:29:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:30,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518354105] [2021-10-11 00:29:30,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:30,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:29:30,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713733330] [2021-10-11 00:29:30,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:29:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:30,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:29:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:29:30,696 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2021-10-11 00:29:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:30,716 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-11 00:29:30,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:29:30,718 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2021-10-11 00:29:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:30,727 INFO L225 Difference]: With dead ends: 56 [2021-10-11 00:29:30,727 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 00:29:30,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:29:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 00:29:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 00:29:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 00:29:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-11 00:29:30,766 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-11 00:29:30,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:30,767 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-11 00:29:30,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:29:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-11 00:29:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 00:29:30,769 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:30,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:30,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:29:30,769 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-11 00:29:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:30,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061487672] [2021-10-11 00:29:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:30,795 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:30,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142590802] [2021-10-11 00:29:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:30,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:29:30,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061487672] [2021-10-11 00:29:30,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:30,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142590802] [2021-10-11 00:29:30,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:30,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:29:30,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217132785] [2021-10-11 00:29:30,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:30,993 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2021-10-11 00:29:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:31,010 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2021-10-11 00:29:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:31,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-10-11 00:29:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:31,012 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:29:31,012 INFO L226 Difference]: Without dead ends: 28 [2021-10-11 00:29:31,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:29:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-11 00:29:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-10-11 00:29:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 00:29:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-10-11 00:29:31,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-10-11 00:29:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:31,020 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-10-11 00:29:31,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-10-11 00:29:31,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 00:29:31,022 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:31,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:31,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:29:31,238 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-10-11 00:29:31,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:31,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455849389] [2021-10-11 00:29:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:29:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455849389] [2021-10-11 00:29:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008247593] [2021-10-11 00:29:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:29:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:29:31,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:31,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-11 00:29:31,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822568757] [2021-10-11 00:29:31,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:31,543 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2021-10-11 00:29:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:31,627 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-10-11 00:29:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:31,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-10-11 00:29:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:31,630 INFO L225 Difference]: With dead ends: 57 [2021-10-11 00:29:31,630 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 00:29:31,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 00:29:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-10-11 00:29:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 00:29:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-10-11 00:29:31,648 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-10-11 00:29:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:31,649 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-10-11 00:29:31,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-10-11 00:29:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-11 00:29:31,653 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:31,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:31,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:31,876 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-10-11 00:29:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:31,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486588025] [2021-10-11 00:29:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-11 00:29:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486588025] [2021-10-11 00:29:31,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713528702] [2021-10-11 00:29:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:32,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 00:29:32,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:32,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:32,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-11 00:29:32,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013950484] [2021-10-11 00:29:32,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:32,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:32,119 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2021-10-11 00:29:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:32,153 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-10-11 00:29:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:32,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-10-11 00:29:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:32,156 INFO L225 Difference]: With dead ends: 46 [2021-10-11 00:29:32,156 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:29:32,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:29:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-10-11 00:29:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-11 00:29:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-10-11 00:29:32,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-10-11 00:29:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:32,165 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-10-11 00:29:32,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-10-11 00:29:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:29:32,166 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:32,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:32,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:32,392 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-10-11 00:29:32,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:32,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009893365] [2021-10-11 00:29:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:32,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009893365] [2021-10-11 00:29:32,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575210437] [2021-10-11 00:29:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 00:29:32,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:32,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-11 00:29:32,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403948873] [2021-10-11 00:29:32,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:29:32,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:29:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:32,536 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2021-10-11 00:29:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:32,596 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-10-11 00:29:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:29:32,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-10-11 00:29:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:32,601 INFO L225 Difference]: With dead ends: 78 [2021-10-11 00:29:32,601 INFO L226 Difference]: Without dead ends: 56 [2021-10-11 00:29:32,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-11 00:29:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-10-11 00:29:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-11 00:29:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-10-11 00:29:32,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-10-11 00:29:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:32,621 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-10-11 00:29:32,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:29:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-10-11 00:29:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 00:29:32,624 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:32,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:32,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:32,852 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-10-11 00:29:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:32,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086802813] [2021-10-11 00:29:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086802813] [2021-10-11 00:29:32,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173424723] [2021-10-11 00:29:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:32,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:29:33,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:33,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:29:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626525181] [2021-10-11 00:29:33,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:29:33,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:29:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:33,080 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2021-10-11 00:29:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:33,114 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-10-11 00:29:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:33,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2021-10-11 00:29:33,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:33,119 INFO L225 Difference]: With dead ends: 90 [2021-10-11 00:29:33,119 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 00:29:33,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 00:29:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-11 00:29:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-11 00:29:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-10-11 00:29:33,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-10-11 00:29:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:33,138 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-10-11 00:29:33,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:29:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-10-11 00:29:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-11 00:29:33,142 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:33,142 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:33,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:29:33,368 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-10-11 00:29:33,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:33,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315651673] [2021-10-11 00:29:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 00:29:33,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315651673] [2021-10-11 00:29:33,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368251785] [2021-10-11 00:29:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:33,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-11 00:29:33,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 00:29:33,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-11 00:29:33,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:33,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-10-11 00:29:33,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407354328] [2021-10-11 00:29:33,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:29:33,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:29:33,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:29:33,645 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2021-10-11 00:29:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:33,756 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-10-11 00:29:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:29:33,757 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-10-11 00:29:33,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:33,759 INFO L225 Difference]: With dead ends: 114 [2021-10-11 00:29:33,759 INFO L226 Difference]: Without dead ends: 109 [2021-10-11 00:29:33,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:29:33,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-11 00:29:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-10-11 00:29:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-11 00:29:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-10-11 00:29:33,785 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-10-11 00:29:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:33,785 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-10-11 00:29:33,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:29:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-10-11 00:29:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-11 00:29:33,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:33,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:34,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:34,008 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-10-11 00:29:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:34,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841403514] [2021-10-11 00:29:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 00:29:34,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841403514] [2021-10-11 00:29:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456967072] [2021-10-11 00:29:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:29:34,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-11 00:29:34,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:29:34,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-11 00:29:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584566983] [2021-10-11 00:29:34,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:29:34,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:34,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:29:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:34,208 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2021-10-11 00:29:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:34,326 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-10-11 00:29:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:29:34,327 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-10-11 00:29:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:34,335 INFO L225 Difference]: With dead ends: 162 [2021-10-11 00:29:34,335 INFO L226 Difference]: Without dead ends: 96 [2021-10-11 00:29:34,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-11 00:29:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-10-11 00:29:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-10-11 00:29:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-10-11 00:29:34,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-10-11 00:29:34,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:34,357 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-10-11 00:29:34,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:29:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-10-11 00:29:34,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-11 00:29:34,358 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:34,358 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:34,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:34,572 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-10-11 00:29:34,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:34,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642625626] [2021-10-11 00:29:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:34,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:34,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039753501] [2021-10-11 00:29:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:34,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:29:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:29:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-11 00:29:34,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642625626] [2021-10-11 00:29:34,769 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:34,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039753501] [2021-10-11 00:29:34,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:34,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-11 00:29:34,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771731006] [2021-10-11 00:29:34,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:29:34,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:29:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:34,771 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2021-10-11 00:29:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:34,797 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-10-11 00:29:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:29:34,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-10-11 00:29:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:34,799 INFO L225 Difference]: With dead ends: 174 [2021-10-11 00:29:34,799 INFO L226 Difference]: Without dead ends: 93 [2021-10-11 00:29:34,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-11 00:29:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-10-11 00:29:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-10-11 00:29:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-10-11 00:29:34,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-10-11 00:29:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:34,807 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-10-11 00:29:34,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:29:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-10-11 00:29:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-11 00:29:34,808 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:34,808 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:35,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-11 00:29:35,036 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:35,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-10-11 00:29:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:35,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878031981] [2021-10-11 00:29:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 00:29:35,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878031981] [2021-10-11 00:29:35,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:35,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:29:35,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963100706] [2021-10-11 00:29:35,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:29:35,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:29:35,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:35,120 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2021-10-11 00:29:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:35,202 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-10-11 00:29:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:35,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2021-10-11 00:29:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:35,204 INFO L225 Difference]: With dead ends: 177 [2021-10-11 00:29:35,205 INFO L226 Difference]: Without dead ends: 108 [2021-10-11 00:29:35,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-11 00:29:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-10-11 00:29:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-10-11 00:29:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-10-11 00:29:35,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-10-11 00:29:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:35,216 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-10-11 00:29:35,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:29:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-10-11 00:29:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-11 00:29:35,217 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:35,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:35,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 00:29:35,217 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:35,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-10-11 00:29:35,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:35,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579404081] [2021-10-11 00:29:35,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:35,244 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:35,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327469661] [2021-10-11 00:29:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:35,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:29:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-11 00:29:35,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579404081] [2021-10-11 00:29:35,423 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:35,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327469661] [2021-10-11 00:29:35,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:35,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-11 00:29:35,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130600552] [2021-10-11 00:29:35,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:29:35,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:29:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:35,425 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2021-10-11 00:29:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:35,453 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-10-11 00:29:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:29:35,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2021-10-11 00:29:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:35,454 INFO L225 Difference]: With dead ends: 157 [2021-10-11 00:29:35,454 INFO L226 Difference]: Without dead ends: 85 [2021-10-11 00:29:35,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-11 00:29:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-11 00:29:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-10-11 00:29:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-10-11 00:29:35,460 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-10-11 00:29:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:35,461 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-10-11 00:29:35,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:29:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-10-11 00:29:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-11 00:29:35,461 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:35,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:35,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:35,676 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-10-11 00:29:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:35,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737583362] [2021-10-11 00:29:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:35,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:35,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515688401] [2021-10-11 00:29:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:29:35,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:29:35,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-11 00:29:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737583362] [2021-10-11 00:29:35,890 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:35,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515688401] [2021-10-11 00:29:35,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:35,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-11 00:29:35,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125295706] [2021-10-11 00:29:35,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:29:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:29:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:35,892 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 5 states. [2021-10-11 00:29:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:35,970 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2021-10-11 00:29:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:29:35,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2021-10-11 00:29:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:35,972 INFO L225 Difference]: With dead ends: 166 [2021-10-11 00:29:35,972 INFO L226 Difference]: Without dead ends: 100 [2021-10-11 00:29:35,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-11 00:29:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-11 00:29:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-10-11 00:29:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-10-11 00:29:35,978 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 56 [2021-10-11 00:29:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:35,980 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-10-11 00:29:35,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:29:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-10-11 00:29:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-11 00:29:35,981 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:35,981 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:36,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:36,196 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 3 times [2021-10-11 00:29:36,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:36,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439739405] [2021-10-11 00:29:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:36,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:36,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903238757] [2021-10-11 00:29:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:36,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 00:29:36,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:36,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-11 00:29:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439739405] [2021-10-11 00:29:36,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903238757] [2021-10-11 00:29:36,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:29:36,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:29:36,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241281802] [2021-10-11 00:29:36,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:29:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:29:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:36,395 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 4 states. [2021-10-11 00:29:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:36,428 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2021-10-11 00:29:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:36,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2021-10-11 00:29:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:36,430 INFO L225 Difference]: With dead ends: 132 [2021-10-11 00:29:36,430 INFO L226 Difference]: Without dead ends: 75 [2021-10-11 00:29:36,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-11 00:29:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-10-11 00:29:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-11 00:29:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-10-11 00:29:36,436 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 65 [2021-10-11 00:29:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:36,436 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-10-11 00:29:36,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:29:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-10-11 00:29:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-11 00:29:36,437 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:36,437 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 00:29:36,652 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1841436961, now seen corresponding path program 1 times [2021-10-11 00:29:36,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899487970] [2021-10-11 00:29:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:36,666 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:36,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153849807] [2021-10-11 00:29:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:29:36,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:29:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-11 00:29:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899487970] [2021-10-11 00:29:36,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:36,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153849807] [2021-10-11 00:29:36,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:36,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-11 00:29:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443944426] [2021-10-11 00:29:36,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:29:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:29:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:36,883 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 7 states. [2021-10-11 00:29:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:37,014 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-10-11 00:29:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:29:37,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2021-10-11 00:29:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:37,016 INFO L225 Difference]: With dead ends: 114 [2021-10-11 00:29:37,016 INFO L226 Difference]: Without dead ends: 75 [2021-10-11 00:29:37,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:29:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-11 00:29:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-11 00:29:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-10-11 00:29:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-10-11 00:29:37,021 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 65 [2021-10-11 00:29:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:37,021 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-10-11 00:29:37,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:29:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-10-11 00:29:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-11 00:29:37,022 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:37,022 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:37,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 00:29:37,238 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -484525568, now seen corresponding path program 2 times [2021-10-11 00:29:37,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:37,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747190725] [2021-10-11 00:29:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:37,252 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:37,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645001293] [2021-10-11 00:29:37,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:37,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:29:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:29:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-11 00:29:37,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747190725] [2021-10-11 00:29:37,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:37,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645001293] [2021-10-11 00:29:37,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:37,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-11 00:29:37,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376511091] [2021-10-11 00:29:37,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:29:37,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:29:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:37,450 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 4 states. [2021-10-11 00:29:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:37,468 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-10-11 00:29:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:29:37,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2021-10-11 00:29:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:37,469 INFO L225 Difference]: With dead ends: 100 [2021-10-11 00:29:37,470 INFO L226 Difference]: Without dead ends: 78 [2021-10-11 00:29:37,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:29:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-11 00:29:37,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-10-11 00:29:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-10-11 00:29:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-10-11 00:29:37,475 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2021-10-11 00:29:37,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:37,475 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-10-11 00:29:37,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:29:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-10-11 00:29:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-11 00:29:37,476 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:37,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:37,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 00:29:37,692 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:37,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2021-10-11 00:29:37,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:37,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317110163] [2021-10-11 00:29:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:37,704 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:37,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813514868] [2021-10-11 00:29:37,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:38,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 00:29:38,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:29:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-11 00:29:38,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317110163] [2021-10-11 00:29:38,153 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:38,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813514868] [2021-10-11 00:29:38,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:38,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-11 00:29:38,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587732916] [2021-10-11 00:29:38,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:29:38,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:38,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:29:38,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:38,155 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 5 states. [2021-10-11 00:29:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:38,179 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-10-11 00:29:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:29:38,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2021-10-11 00:29:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:38,180 INFO L225 Difference]: With dead ends: 102 [2021-10-11 00:29:38,180 INFO L226 Difference]: Without dead ends: 80 [2021-10-11 00:29:38,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:29:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-11 00:29:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-10-11 00:29:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 00:29:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-11 00:29:38,185 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2021-10-11 00:29:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:38,185 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-11 00:29:38,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:29:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-11 00:29:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-11 00:29:38,186 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:38,187 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:38,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:38,412 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:38,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 4 times [2021-10-11 00:29:38,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:38,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022295597] [2021-10-11 00:29:38,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:38,423 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:38,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700936058] [2021-10-11 00:29:38,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:38,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:29:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:29:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:29:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:29:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-10-11 00:29:38,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022295597] [2021-10-11 00:29:38,674 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 00:29:38,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700936058] [2021-10-11 00:29:38,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:29:38,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-11 00:29:38,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604812063] [2021-10-11 00:29:38,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:29:38,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:29:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:29:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:38,677 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2021-10-11 00:29:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:29:38,705 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-10-11 00:29:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:29:38,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2021-10-11 00:29:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:29:38,707 INFO L225 Difference]: With dead ends: 103 [2021-10-11 00:29:38,707 INFO L226 Difference]: Without dead ends: 81 [2021-10-11 00:29:38,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:29:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-11 00:29:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-11 00:29:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-10-11 00:29:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-10-11 00:29:38,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2021-10-11 00:29:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:29:38,716 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-10-11 00:29:38,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:29:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-10-11 00:29:38,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-11 00:29:38,717 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:29:38,717 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:29:38,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-11 00:29:38,928 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:29:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:29:38,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 5 times [2021-10-11 00:29:38,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:29:38,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793135940] [2021-10-11 00:29:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:29:38,940 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 00:29:38,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032958029] [2021-10-11 00:29:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:29:39,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-11 00:29:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-11 00:29:39,338 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:29:39,528 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:29:39,744 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:29:39,744 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:29:39,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-11 00:29:40,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:29:40 BoogieIcfgContainer [2021-10-11 00:29:40,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:29:40,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:29:40,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:29:40,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:29:40,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:29:30" (3/4) ... [2021-10-11 00:29:40,059 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:29:40,135 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a3f1884-8293-4433-aa97-76884dda4307/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:29:40,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:29:40,137 INFO L168 Benchmark]: Toolchain (without parser) took 10583.94 ms. Allocated memory was 83.9 MB in the beginning and 136.3 MB in the end (delta: 52.4 MB). Free memory was 48.1 MB in the beginning and 53.8 MB in the end (delta: -5.7 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,137 INFO L168 Benchmark]: CDTParser took 0.55 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 66.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:29:40,138 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.75 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 48.0 MB in the beginning and 77.0 MB in the end (delta: -29.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,139 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.87 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,139 INFO L168 Benchmark]: Boogie Preprocessor took 35.20 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,140 INFO L168 Benchmark]: RCFGBuilder took 387.54 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 54.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,140 INFO L168 Benchmark]: TraceAbstraction took 9713.67 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 54.3 MB in the beginning and 61.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,141 INFO L168 Benchmark]: Witness Printer took 79.00 ms. Allocated memory is still 136.3 MB. Free memory was 61.1 MB in the beginning and 53.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 00:29:40,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55 ms. Allocated memory is still 83.9 MB. Free memory was 65.0 MB in the beginning and 64.9 MB in the end (delta: 66.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.75 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 48.0 MB in the beginning and 77.0 MB in the end (delta: -29.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.87 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.20 ms. Allocated memory is still 100.7 MB. Free memory was 75.0 MB in the beginning and 73.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 387.54 ms. Allocated memory is still 100.7 MB. Free memory was 73.4 MB in the beginning and 54.7 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9713.67 ms. Allocated memory was 100.7 MB in the beginning and 136.3 MB in the end (delta: 35.7 MB). Free memory was 54.3 MB in the beginning and 61.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 32.3 MB. Max. memory is 16.1 GB. * Witness Printer took 79.00 ms. Allocated memory is still 136.3 MB. Free memory was 61.1 MB in the beginning and 53.8 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.5s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 526 SDtfs, 266 SDslu, 677 SDs, 0 SdLazy, 362 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 721 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 95 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 1024 NumberOfCodeBlocks, 941 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 58587 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 PerfectInterpolantSequences, 765/844 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...