./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y --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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:30:07,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:30:07,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:30:07,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:30:07,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:30:07,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:30:07,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:30:07,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:30:07,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:30:07,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:30:07,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:30:07,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:30:07,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:30:07,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:30:07,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:30:07,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:30:07,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:30:07,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:30:07,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:30:07,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:30:07,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:30:07,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:30:07,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:30:07,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:30:07,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:30:07,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:30:07,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:30:07,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:30:07,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:30:07,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:30:07,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:30:07,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:30:07,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:30:07,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:30:07,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:30:07,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:30:07,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:30:07,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:30:07,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:30:07,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:30:07,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:30:07,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:30:07,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:30:07,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:30:07,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:30:07,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:30:07,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:30:07,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:30:07,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:30:07,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:30:07,335 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:30:07,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:30:07,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:30:07,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:30:07,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:30:07,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:30:07,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:30:07,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:30:07,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:30:07,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:30:07,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:30:07,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:30:07,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:30:07,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:30:07,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:30:07,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:30:07,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:07,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:30:07,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:30:07,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:30:07,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:30:07,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:30:07,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:30:07,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:30:07,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:30:07,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:30:07,343 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2021-11-13 18:30:07,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:30:07,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:30:07,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:30:07,644 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:30:07,645 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:30:07,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-11-13 18:30:07,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/50d443847/80142ca75a294c0ebc135c87f0086bbb/FLAG6f8e1a517 [2021-11-13 18:30:08,285 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:30:08,289 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-11-13 18:30:08,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/50d443847/80142ca75a294c0ebc135c87f0086bbb/FLAG6f8e1a517 [2021-11-13 18:30:08,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/50d443847/80142ca75a294c0ebc135c87f0086bbb [2021-11-13 18:30:08,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:30:08,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:30:08,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:08,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:30:08,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:30:08,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:08" (1/1) ... [2021-11-13 18:30:08,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab6dd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:08, skipping insertion in model container [2021-11-13 18:30:08,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:08" (1/1) ... [2021-11-13 18:30:08,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:30:08,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:30:08,869 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2021-11-13 18:30:08,920 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2021-11-13 18:30:08,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:08,937 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:30:08,959 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2021-11-13 18:30:08,984 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2021-11-13 18:30:08,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:09,006 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:30:09,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09 WrapperNode [2021-11-13 18:30:09,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:09,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:09,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:30:09,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:30:09,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:09,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:30:09,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:30:09,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:30:09,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:30:09,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:30:09,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:30:09,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:30:09,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (1/1) ... [2021-11-13 18:30:09,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:09,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:09,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:30:09,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:30:09,217 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-13 18:30:09,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-13 18:30:09,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:30:09,218 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-13 18:30:09,218 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-13 18:30:09,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:30:09,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:30:09,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:30:09,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:30:09,219 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:30:09,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:30:09,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:30:09,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:09 BoogieIcfgContainer [2021-11-13 18:30:09,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:30:09,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:30:09,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:30:09,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:30:09,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:30:08" (1/3) ... [2021-11-13 18:30:09,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3236a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:09, skipping insertion in model container [2021-11-13 18:30:09,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:09" (2/3) ... [2021-11-13 18:30:09,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3236a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:09, skipping insertion in model container [2021-11-13 18:30:09,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:09" (3/3) ... [2021-11-13 18:30:09,563 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2021-11-13 18:30:09,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:30:09,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:30:09,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:30:09,624 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:30:09,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:30:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:30:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:30:09,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:09,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:09,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:09,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-11-13 18:30:09,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:09,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77633822] [2021-11-13 18:30:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:09,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:09,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:09,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77633822] [2021-11-13 18:30:09,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77633822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:09,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:09,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:30:09,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945168122] [2021-11-13 18:30:09,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:30:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:30:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:30:09,983 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:10,049 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-11-13 18:30:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:30:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:30:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:10,061 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:30:10,062 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:30:10,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:30:10,069 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:10,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 26.38ms Time] [2021-11-13 18:30:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:30:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-13 18:30:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-13 18:30:10,116 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2021-11-13 18:30:10,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:10,116 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-13 18:30:10,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,117 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-13 18:30:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:30:10,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:10,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:10,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:30:10,120 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2021-11-13 18:30:10,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:10,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647541591] [2021-11-13 18:30:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:10,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:10,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:10,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647541591] [2021-11-13 18:30:10,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647541591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:10,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:10,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:30:10,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35013958] [2021-11-13 18:30:10,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:10,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:30:10,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:10,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:30:10,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:30:10,194 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:10,216 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-11-13 18:30:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:30:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:30:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:10,223 INFO L225 Difference]: With dead ends: 67 [2021-11-13 18:30:10,227 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 18:30:10,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:30:10,230 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:10,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 10.11ms Time] [2021-11-13 18:30:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 18:30:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-11-13 18:30:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-11-13 18:30:10,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2021-11-13 18:30:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:10,252 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-11-13 18:30:10,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-11-13 18:30:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:30:10,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:10,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:10,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:30:10,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-11-13 18:30:10,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:10,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228654326] [2021-11-13 18:30:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:10,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:10,282 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:10,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615863955] [2021-11-13 18:30:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:10,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:10,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:10,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:10,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:30:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:30:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:10,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:10,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:10,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228654326] [2021-11-13 18:30:10,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:10,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615863955] [2021-11-13 18:30:10,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615863955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:10,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:10,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-13 18:30:10,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776828055] [2021-11-13 18:30:10,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:10,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:30:10,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:30:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:30:10,629 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:10,671 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-13 18:30:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:30:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-13 18:30:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:10,673 INFO L225 Difference]: With dead ends: 58 [2021-11-13 18:30:10,673 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:30:10,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:30:10,676 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:10,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 34 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 26.61ms Time] [2021-11-13 18:30:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:30:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-13 18:30:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-13 18:30:10,686 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2021-11-13 18:30:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-13 18:30:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-13 18:30:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:30:10,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:10,692 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:10,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:10,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:10,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2021-11-13 18:30:10,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:10,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769295029] [2021-11-13 18:30:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:10,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:10,934 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:10,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564991635] [2021-11-13 18:30:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:10,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:10,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:10,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:10,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:30:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:11,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:30:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:11,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:11,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:11,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769295029] [2021-11-13 18:30:11,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:11,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564991635] [2021-11-13 18:30:11,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564991635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:11,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:11,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:30:11,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816107794] [2021-11-13 18:30:11,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:11,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:30:11,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:30:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:30:11,393 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:11,500 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-11-13 18:30:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:30:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-13 18:30:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:11,508 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:30:11,508 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 18:30:11,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:30:11,510 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:11,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 265 Invalid, 44 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 55.46ms Time] [2021-11-13 18:30:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 18:30:11,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-13 18:30:11,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-13 18:30:11,519 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2021-11-13 18:30:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:11,519 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-13 18:30:11,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-13 18:30:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:30:11,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:11,521 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:11,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:11,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:11,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:11,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-11-13 18:30:11,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:11,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542159373] [2021-11-13 18:30:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:11,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:11,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:11,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663225933] [2021-11-13 18:30:11,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:30:11,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:11,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:11,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:11,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:30:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:30:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:30:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:12,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:12,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:12,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542159373] [2021-11-13 18:30:12,157 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:12,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663225933] [2021-11-13 18:30:12,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663225933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:12,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:12,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-13 18:30:12,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162507231] [2021-11-13 18:30:12,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:12,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:30:12,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:30:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:30:12,160 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:12,259 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2021-11-13 18:30:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:30:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:30:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:12,261 INFO L225 Difference]: With dead ends: 68 [2021-11-13 18:30:12,261 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:30:12,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:30:12,263 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.56ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:12,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 301 Invalid, 92 Unknown, 0 Unchecked, 3.56ms Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 54.90ms Time] [2021-11-13 18:30:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:30:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-13 18:30:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-13 18:30:12,272 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2021-11-13 18:30:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:12,273 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-13 18:30:12,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-13 18:30:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:30:12,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:12,274 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:12,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:12,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:12,495 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2021-11-13 18:30:12,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:12,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529786947] [2021-11-13 18:30:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:12,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:12,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:12,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699144046] [2021-11-13 18:30:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:30:12,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:12,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:12,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:30:12,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:30:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:12,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:30:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:30:12,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:30:13,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:13,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529786947] [2021-11-13 18:30:13,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:13,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699144046] [2021-11-13 18:30:13,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699144046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:13,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:13,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-13 18:30:13,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923043766] [2021-11-13 18:30:13,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:30:13,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:30:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:30:13,286 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:13,824 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2021-11-13 18:30:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:30:13,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-13 18:30:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:13,828 INFO L225 Difference]: With dead ends: 81 [2021-11-13 18:30:13,828 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 18:30:13,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:30:13,830 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 39 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.69ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 355 Invalid, 270 Unknown, 0 Unchecked, 5.69ms Time], IncrementalHoareTripleChecker [39 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 295.34ms Time] [2021-11-13 18:30:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 18:30:13,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2021-11-13 18:30:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:30:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-11-13 18:30:13,844 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2021-11-13 18:30:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:13,845 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-11-13 18:30:13,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-11-13 18:30:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:30:13,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:13,847 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:13,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:14,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:30:14,070 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2021-11-13 18:30:14,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:14,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445481094] [2021-11-13 18:30:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:14,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:14,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:14,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113408842] [2021-11-13 18:30:14,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:30:14,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:14,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:14,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:14,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:30:14,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:30:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:30:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:14,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:14,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:14,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445481094] [2021-11-13 18:30:14,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:14,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113408842] [2021-11-13 18:30:14,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113408842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:14,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:14,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-13 18:30:14,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188726982] [2021-11-13 18:30:14,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:14,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:30:14,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:14,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:30:14,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:30:14,610 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:14,807 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2021-11-13 18:30:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:30:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-13 18:30:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:14,810 INFO L225 Difference]: With dead ends: 94 [2021-11-13 18:30:14,810 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:30:14,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:30:14,812 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:14,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 375 Invalid, 159 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [32 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 103.95ms Time] [2021-11-13 18:30:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:30:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-13 18:30:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:30:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-11-13 18:30:14,824 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2021-11-13 18:30:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:14,824 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-11-13 18:30:14,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-11-13 18:30:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:30:14,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:14,826 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:14,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:15,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:15,043 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2021-11-13 18:30:15,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:15,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492780297] [2021-11-13 18:30:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:15,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:15,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:15,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062622351] [2021-11-13 18:30:15,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:30:15,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:15,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:30:15,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-13 18:30:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:30:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:15,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:17,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:17,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492780297] [2021-11-13 18:30:17,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:17,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062622351] [2021-11-13 18:30:17,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062622351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:17,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:17,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-13 18:30:17,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009725587] [2021-11-13 18:30:17,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:17,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:30:17,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:30:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:30:17,515 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:17,603 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-11-13 18:30:17,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:30:17,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:30:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:17,604 INFO L225 Difference]: With dead ends: 76 [2021-11-13 18:30:17,604 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:30:17,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:30:17,606 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 53.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:17,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 354 Invalid, 104 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 25 Unchecked, 53.28ms Time] [2021-11-13 18:30:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:30:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-13 18:30:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:30:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-13 18:30:17,631 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2021-11-13 18:30:17,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:17,631 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-13 18:30:17,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:17,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-13 18:30:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:30:17,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:17,636 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:17,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:17,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:17,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:17,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2021-11-13 18:30:17,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:17,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357380004] [2021-11-13 18:30:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:17,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:17,863 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:30:17,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256716563] [2021-11-13 18:30:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:17,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:30:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:17,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:30:17,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:30:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:30:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:30:18,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:30:18,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:30:18,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357380004] [2021-11-13 18:30:18,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:30:18,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256716563] [2021-11-13 18:30:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256716563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:18,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:18,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-13 18:30:18,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660138428] [2021-11-13 18:30:18,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:18,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:30:18,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:30:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:30:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:30:18,566 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:30:19,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:19,416 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-13 18:30:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:30:19,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-13 18:30:19,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:19,417 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:30:19,417 INFO L226 Difference]: Without dead ends: 23 [2021-11-13 18:30:19,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:30:19,418 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 169.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:19,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 379 Invalid, 162 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [11 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 190.29ms Time] [2021-11-13 18:30:19,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-13 18:30:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-13 18:30:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:30:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-13 18:30:19,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2021-11-13 18:30:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:19,422 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-13 18:30:19,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:30:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-13 18:30:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:30:19,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:19,424 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-13 18:30:19,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:19,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:30:19,640 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:19,641 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-11-13 18:30:19,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:30:19,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749070550] [2021-11-13 18:30:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:19,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:30:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:30:19,659 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:30:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:30:19,728 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:30:19,734 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:30:19,735 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 18:30:19,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 18:30:19,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:30:19,741 INFO L732 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2021-11-13 18:30:19,744 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:30:19,766 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:30:19,769 INFO L158 Benchmark]: Toolchain (without parser) took 11130.74ms. Allocated memory was 94.4MB in the beginning and 159.4MB in the end (delta: 65.0MB). Free memory was 64.2MB in the beginning and 124.4MB in the end (delta: -60.2MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB. [2021-11-13 18:30:19,769 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory was 57.4MB in the beginning and 57.3MB in the end (delta: 61.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:30:19,770 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.33ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 64.0MB in the beginning and 106.8MB in the end (delta: -42.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:30:19,771 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.08ms. Allocated memory is still 132.1MB. Free memory was 106.8MB in the beginning and 105.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:30:19,771 INFO L158 Benchmark]: Boogie Preprocessor took 53.45ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 104.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:30:19,771 INFO L158 Benchmark]: RCFGBuilder took 431.26ms. Allocated memory is still 132.1MB. Free memory was 104.0MB in the beginning and 92.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 18:30:19,772 INFO L158 Benchmark]: TraceAbstraction took 10212.31ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 92.2MB in the beginning and 124.4MB in the end (delta: -32.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:30:19,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory was 57.4MB in the beginning and 57.3MB in the end (delta: 61.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.33ms. Allocated memory was 94.4MB in the beginning and 132.1MB in the end (delta: 37.7MB). Free memory was 64.0MB in the beginning and 106.8MB in the end (delta: -42.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.08ms. Allocated memory is still 132.1MB. Free memory was 106.8MB in the beginning and 105.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.45ms. Allocated memory is still 132.1MB. Free memory was 105.1MB in the beginning and 104.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 431.26ms. Allocated memory is still 132.1MB. Free memory was 104.0MB in the beginning and 92.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10212.31ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 92.2MB in the beginning and 124.4MB in the end (delta: -32.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:30:19,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y --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 f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:30:22,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:30:22,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:30:22,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:30:22,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:30:22,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:30:22,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:30:22,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:30:22,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:30:22,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:30:22,262 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:30:22,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:30:22,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:30:22,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:30:22,268 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:30:22,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:30:22,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:30:22,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:30:22,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:30:22,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:30:22,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:30:22,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:30:22,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:30:22,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:30:22,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:30:22,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:30:22,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:30:22,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:30:22,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:30:22,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:30:22,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:30:22,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:30:22,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:30:22,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:30:22,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:30:22,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:30:22,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:30:22,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:30:22,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:30:22,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:30:22,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:30:22,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:30:22,339 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:30:22,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:30:22,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:30:22,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:30:22,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:30:22,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:30:22,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:30:22,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:30:22,346 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:30:22,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:30:22,347 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:30:22,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:30:22,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:30:22,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:30:22,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:30:22,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:30:22,349 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:30:22,349 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:30:22,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:30:22,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:30:22,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:30:22,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:30:22,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:30:22,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:30:22,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:30:22,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:22,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:30:22,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:30:22,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:30:22,352 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:30:22,352 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:30:22,352 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:30:22,353 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:30:22,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:30:22,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:30:22,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:30:22,354 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2021-11-13 18:30:22,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:30:22,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:30:22,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:30:22,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:30:22,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:30:22,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-11-13 18:30:22,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/cb986efae/c932aca3bbd24330b6a6a11f99a82bc2/FLAG7fae5f94d [2021-11-13 18:30:23,444 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:30:23,449 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2021-11-13 18:30:23,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/cb986efae/c932aca3bbd24330b6a6a11f99a82bc2/FLAG7fae5f94d [2021-11-13 18:30:23,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/data/cb986efae/c932aca3bbd24330b6a6a11f99a82bc2 [2021-11-13 18:30:23,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:30:23,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:30:23,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:23,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:30:23,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:30:23,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:23" (1/1) ... [2021-11-13 18:30:23,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d169231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:23, skipping insertion in model container [2021-11-13 18:30:23,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:30:23" (1/1) ... [2021-11-13 18:30:23,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:30:23,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:30:23,952 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2021-11-13 18:30:23,982 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2021-11-13 18:30:23,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:23,996 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:30:24,009 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2021-11-13 18:30:24,023 WARN L228 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_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2021-11-13 18:30:24,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:30:24,062 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:30:24,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24 WrapperNode [2021-11-13 18:30:24,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:30:24,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:24,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:30:24,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:30:24,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:30:24,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:30:24,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:30:24,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:30:24,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:30:24,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:30:24,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:30:24,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:30:24,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (1/1) ... [2021-11-13 18:30:24,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:30:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:30:24,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:30:24,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:30:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:30:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-13 18:30:24,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-13 18:30:24,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:30:24,239 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-13 18:30:24,239 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-13 18:30:24,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:30:24,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:30:24,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:30:24,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:30:31,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:30:31,180 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:30:31,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:31 BoogieIcfgContainer [2021-11-13 18:30:31,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:30:31,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:30:31,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:30:31,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:30:31,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:30:23" (1/3) ... [2021-11-13 18:30:31,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4253fcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:31, skipping insertion in model container [2021-11-13 18:30:31,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:30:24" (2/3) ... [2021-11-13 18:30:31,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4253fcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:30:31, skipping insertion in model container [2021-11-13 18:30:31,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:30:31" (3/3) ... [2021-11-13 18:30:31,192 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2021-11-13 18:30:31,199 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:30:31,199 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:30:31,252 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:30:31,259 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:30:31,260 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:30:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:30:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:30:31,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:31,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:31,290 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2021-11-13 18:30:31,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:30:31,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673858049] [2021-11-13 18:30:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:31,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:30:31,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:30:31,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:30:31,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:30:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:30:31,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:31,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:31,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:30:31,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673858049] [2021-11-13 18:30:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673858049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:31,845 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:31,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:30:31,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518537326] [2021-11-13 18:30:31,850 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:31,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:31,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:30:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:31,894 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:32,017 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2021-11-13 18:30:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:30:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:30:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:32,031 INFO L225 Difference]: With dead ends: 99 [2021-11-13 18:30:32,031 INFO L226 Difference]: Without dead ends: 46 [2021-11-13 18:30:32,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:32,050 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:32,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 12 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 78.28ms Time] [2021-11-13 18:30:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-13 18:30:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-11-13 18:30:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-11-13 18:30:32,094 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2021-11-13 18:30:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:32,095 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-11-13 18:30:32,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-11-13 18:30:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:30:32,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:32,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:32,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:32,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:30:32,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2021-11-13 18:30:32,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:30:32,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764463910] [2021-11-13 18:30:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:32,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:30:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:30:32,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:30:32,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:30:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:30:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:32,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:30:32,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764463910] [2021-11-13 18:30:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764463910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:32,749 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:32,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:30:32,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230413823] [2021-11-13 18:30:32,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:32,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:32,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:30:32,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:32,753 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:32,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:32,943 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2021-11-13 18:30:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:30:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 18:30:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:32,953 INFO L225 Difference]: With dead ends: 55 [2021-11-13 18:30:32,953 INFO L226 Difference]: Without dead ends: 41 [2021-11-13 18:30:32,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:32,956 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.55ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:32,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 12 Unknown, 0 Unchecked, 2.55ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 177.44ms Time] [2021-11-13 18:30:32,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-13 18:30:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-13 18:30:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-11-13 18:30:32,974 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2021-11-13 18:30:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:32,974 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-11-13 18:30:32,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-11-13 18:30:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:30:32,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:32,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:32,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:33,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:30:33,190 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:33,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2021-11-13 18:30:33,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:30:33,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818901125] [2021-11-13 18:30:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:33,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:30:33,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:30:33,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:30:33,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:30:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:33,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:30:33,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:33,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:33,818 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:30:33,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818901125] [2021-11-13 18:30:33,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818901125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:30:33,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:30:33,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:30:33,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095668199] [2021-11-13 18:30:33,819 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:30:33,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:30:33,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:30:33,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:30:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:33,821 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:33,959 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-11-13 18:30:33,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:30:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-13 18:30:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:33,962 INFO L225 Difference]: With dead ends: 58 [2021-11-13 18:30:33,962 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:30:33,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:30:33,965 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:33,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 16 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 122.01ms Time] [2021-11-13 18:30:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:30:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-13 18:30:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-13 18:30:33,976 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 15 [2021-11-13 18:30:33,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:33,977 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-13 18:30:33,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-13 18:30:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:30:33,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:33,979 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:33,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:34,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:30:34,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1992824063, now seen corresponding path program 1 times [2021-11-13 18:30:34,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:30:34,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749252561] [2021-11-13 18:30:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:30:34,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:30:34,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:30:34,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:30:34,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:30:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:30:34,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:30:34,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:30:35,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:30:35,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749252561] [2021-11-13 18:30:35,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749252561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:35,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:35,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-13 18:30:35,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375482582] [2021-11-13 18:30:35,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:35,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:30:35,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:30:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:30:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:30:35,409 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:30:35,701 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-11-13 18:30:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:30:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-13 18:30:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:30:35,712 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:30:35,712 INFO L226 Difference]: Without dead ends: 47 [2021-11-13 18:30:35,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:30:35,715 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.60ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 277.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:30:35,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 189 Invalid, 46 Unknown, 0 Unchecked, 3.60ms Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 277.05ms Time] [2021-11-13 18:30:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-13 18:30:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-13 18:30:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:30:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-13 18:30:35,726 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2021-11-13 18:30:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:30:35,727 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-13 18:30:35,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:30:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-13 18:30:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:30:35,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:30:35,729 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:30:35,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:30:35,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:30:35,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:30:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:30:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2021-11-13 18:30:35,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:30:35,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864559584] [2021-11-13 18:30:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:30:35,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:30:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:30:35,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:30:35,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:30:36,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:30:36,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:30:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:30:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:30:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:30:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:30:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:30:46,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:30:46,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864559584] [2021-11-13 18:30:46,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864559584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:30:46,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:30:46,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-13 18:30:46,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380338076] [2021-11-13 18:30:46,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:30:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:30:46,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:30:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:30:46,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:30:46,400 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:05,733 WARN L227 SmtUtils]: Spent 8.73s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:31:30,033 WARN L227 SmtUtils]: Spent 13.73s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:31:50,494 WARN L227 SmtUtils]: Spent 12.46s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:31:55,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:31:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:55,473 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2021-11-13 18:31:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:31:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-13 18:31:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:55,506 INFO L225 Difference]: With dead ends: 71 [2021-11-13 18:31:55,506 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 18:31:55,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:31:55,508 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8019.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.68ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8577.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:55,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 462 Invalid, 277 Unknown, 0 Unchecked, 7.68ms Time], IncrementalHoareTripleChecker [39 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 8577.56ms Time] [2021-11-13 18:31:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 18:31:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-13 18:31:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:31:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2021-11-13 18:31:55,524 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2021-11-13 18:31:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:55,524 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2021-11-13 18:31:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2021-11-13 18:31:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:31:55,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:55,527 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:31:55,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:31:55,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:31:55,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2021-11-13 18:31:55,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:31:55,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727029758] [2021-11-13 18:31:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:31:55,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:31:55,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:31:55,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:31:55,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:31:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:31:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:31:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:31:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:31:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:31:55,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:31:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:31:56,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:31:56,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727029758] [2021-11-13 18:31:56,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727029758] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:31:56,033 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:31:56,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:31:56,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813842249] [2021-11-13 18:31:56,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:31:56,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:31:56,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:31:56,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:31:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:31:56,035 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:56,088 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-11-13 18:31:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:31:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-13 18:31:56,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:56,091 INFO L225 Difference]: With dead ends: 78 [2021-11-13 18:31:56,091 INFO L226 Difference]: Without dead ends: 67 [2021-11-13 18:31:56,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:31:56,093 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:56,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 39.52ms Time] [2021-11-13 18:31:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-13 18:31:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-13 18:31:56,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:31:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-13 18:31:56,105 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2021-11-13 18:31:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:56,106 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-13 18:31:56,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-13 18:31:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:31:56,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:56,108 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:31:56,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:31:56,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:31:56,323 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2021-11-13 18:31:56,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:31:56,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741715698] [2021-11-13 18:31:56,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:31:56,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:31:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:31:56,326 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:31:56,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:31:56,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:31:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:31:56,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:31:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:31:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:31:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:31:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:31:57,926 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:31:57,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741715698] [2021-11-13 18:31:57,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741715698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:31:57,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:31:57,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:31:57,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934683525] [2021-11-13 18:31:57,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:31:57,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:31:57,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:31:57,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:31:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:31:57,929 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:31:58,813 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-13 18:31:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:31:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-13 18:31:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:31:58,824 INFO L225 Difference]: With dead ends: 88 [2021-11-13 18:31:58,825 INFO L226 Difference]: Without dead ends: 64 [2021-11-13 18:31:58,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:31:58,826 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 605.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 650.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:31:58,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 299 Invalid, 101 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 650.01ms Time] [2021-11-13 18:31:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-13 18:31:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-11-13 18:31:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:31:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-11-13 18:31:58,844 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2021-11-13 18:31:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:31:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-11-13 18:31:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:31:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-11-13 18:31:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:31:58,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:31:58,853 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:31:58,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:31:59,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:31:59,067 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:31:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:31:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2021-11-13 18:31:59,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:31:59,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220478543] [2021-11-13 18:31:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:31:59,068 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:31:59,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:31:59,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:31:59,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:31:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:31:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:31:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:32:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:32:00,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:32:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:32:00,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:32:00,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220478543] [2021-11-13 18:32:00,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220478543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:32:00,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:32:00,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-13 18:32:00,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437710755] [2021-11-13 18:32:00,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:32:00,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:32:00,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:32:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:32:00,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:32:00,866 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:32:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:01,590 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-13 18:32:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:32:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-13 18:32:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:01,592 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:32:01,592 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:32:01,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:32:01,594 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 396.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 413.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:01,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 106 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [14 Valid, 74 Invalid, 0 Unknown, 18 Unchecked, 413.80ms Time] [2021-11-13 18:32:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:32:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-13 18:32:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:32:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-11-13 18:32:01,606 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 26 [2021-11-13 18:32:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:01,606 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-11-13 18:32:01,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:32:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-11-13 18:32:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:32:01,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:01,608 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:32:01,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:32:01,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:32:01,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:01,818 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2021-11-13 18:32:01,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:32:01,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647716873] [2021-11-13 18:32:01,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:32:01,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:32:01,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:32:01,820 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:32:01,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:32:01,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-13 18:32:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:32:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:32:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:32:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:32:02,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:32:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:32:05,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:32:05,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647716873] [2021-11-13 18:32:05,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647716873] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:32:05,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:32:05,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-13 18:32:05,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60063284] [2021-11-13 18:32:05,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:32:05,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:32:05,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:32:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:32:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:32:05,510 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:32:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:06,218 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-13 18:32:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:32:06,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-13 18:32:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:06,235 INFO L225 Difference]: With dead ends: 75 [2021-11-13 18:32:06,235 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:32:06,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:32:06,237 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 661.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 693.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:06,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 242 Invalid, 127 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 693.51ms Time] [2021-11-13 18:32:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:32:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-13 18:32:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:32:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-13 18:32:06,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2021-11-13 18:32:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-13 18:32:06,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:32:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-13 18:32:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:32:06,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:06,247 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:32:06,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:32:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:32:06,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2021-11-13 18:32:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:32:06,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184301117] [2021-11-13 18:32:06,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:32:06,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:32:06,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:32:06,467 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:32:06,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:32:06,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:32:06,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:32:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:32:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:32:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:32:07,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:32:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:32:17,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:32:17,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184301117] [2021-11-13 18:32:17,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184301117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:32:17,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:32:17,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-13 18:32:17,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749425583] [2021-11-13 18:32:17,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:32:17,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:32:17,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:32:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:32:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:32:17,931 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:32:33,176 WARN L227 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 30 DAG size of output: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:32:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:32:34,274 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-11-13 18:32:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:32:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-13 18:32:34,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:32:34,275 INFO L225 Difference]: With dead ends: 49 [2021-11-13 18:32:34,275 INFO L226 Difference]: Without dead ends: 23 [2021-11-13 18:32:34,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:32:34,276 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2159.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2452.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:32:34,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 378 Invalid, 169 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [11 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 2452.80ms Time] [2021-11-13 18:32:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-13 18:32:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-13 18:32:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:32:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-13 18:32:34,281 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2021-11-13 18:32:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:32:34,282 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-13 18:32:34,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:32:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-13 18:32:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:32:34,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:32:34,284 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-13 18:32:34,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:32:34,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:32:34,486 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:32:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:32:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2021-11-13 18:32:34,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:32:34,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12456746] [2021-11-13 18:32:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:32:34,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:32:34,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:32:34,488 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:32:34,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_453f6bd8-d742-4c4a-b3c7-70c962c14ff5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process