./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-2.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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/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 b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:41:00,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:41:00,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:41:00,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:41:00,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:41:00,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:41:00,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:41:00,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:41:00,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:41:00,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:41:00,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:41:00,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:41:00,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:41:00,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:41:00,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:41:00,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:41:00,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:41:00,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:41:00,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:41:00,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:41:00,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:41:00,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:41:00,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:41:00,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:41:00,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:41:00,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:41:00,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:41:00,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:41:00,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:41:00,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:41:00,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:41:00,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:41:00,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:41:00,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:41:00,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:41:00,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:41:00,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:41:00,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:41:00,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:41:00,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:41:00,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:41:00,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:41:00,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:41:00,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:41:00,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:41:00,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:41:00,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:41:00,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:41:00,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:41:00,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:41:00,360 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:41:00,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:41:00,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:41:00,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:41:00,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:41:00,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:41:00,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:41:00,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:41:00,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:41:00,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:41:00,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:41:00,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:41:00,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:41:00,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:41:00,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:41:00,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:41:00,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:00,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:41:00,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:41:00,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:41:00,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:41:00,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:41:00,367 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:41:00,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:41:00,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:41:00,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:41:00,368 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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2021-11-13 18:41:00,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:41:00,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:41:00,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:41:00,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:41:00,810 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:41:00,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-13 18:41:00,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/data/c2b947bb4/7546ebb811df40ecaf1327214944fa91/FLAG29f383599 [2021-11-13 18:41:01,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:41:01,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/sv-benchmarks/c/array-examples/standard_running-2.i [2021-11-13 18:41:01,577 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/data/c2b947bb4/7546ebb811df40ecaf1327214944fa91/FLAG29f383599 [2021-11-13 18:41:01,876 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/data/c2b947bb4/7546ebb811df40ecaf1327214944fa91 [2021-11-13 18:41:01,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:41:01,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:41:01,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:01,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:41:01,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:41:01,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:01" (1/1) ... [2021-11-13 18:41:01,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497a196d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:01, skipping insertion in model container [2021-11-13 18:41:01,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:41:01" (1/1) ... [2021-11-13 18:41:01,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:41:01,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:41:02,190 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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-13 18:41:02,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:02,222 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:41:02,239 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_499320dc-5c02-47a8-9659-14bdbfb6a4fe/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2021-11-13 18:41:02,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:41:02,266 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:41:02,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02 WrapperNode [2021-11-13 18:41:02,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:41:02,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:02,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:41:02,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:41:02,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:41:02,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:41:02,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:41:02,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:41:02,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:41:02,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:41:02,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:41:02,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:41:02,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (1/1) ... [2021-11-13 18:41:02,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:41:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:02,410 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:41:02,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:41:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:41:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:41:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:41:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:41:02,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:41:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:41:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:41:02,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:41:02,905 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:41:02,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:02 BoogieIcfgContainer [2021-11-13 18:41:02,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:41:02,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:41:02,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:41:02,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:41:02,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:41:01" (1/3) ... [2021-11-13 18:41:02,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10137752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:02, skipping insertion in model container [2021-11-13 18:41:02,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:41:02" (2/3) ... [2021-11-13 18:41:02,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10137752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:41:02, skipping insertion in model container [2021-11-13 18:41:02,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:41:02" (3/3) ... [2021-11-13 18:41:02,920 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2021-11-13 18:41:02,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:41:02,928 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:41:02,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:41:03,002 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 18:41:03,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:41:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:03,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:41:03,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:03,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:03,039 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2021-11-13 18:41:03,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:03,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653833383] [2021-11-13 18:41:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:03,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:03,424 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 18:41:03,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:03,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653833383] [2021-11-13 18:41:03,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653833383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:03,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:41:03,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:41:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459700515] [2021-11-13 18:41:03,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:03,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:41:03,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:03,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:41:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:41:03,498 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:03,638 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2021-11-13 18:41:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:41:03,642 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 18:41:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:03,654 INFO L225 Difference]: With dead ends: 56 [2021-11-13 18:41:03,654 INFO L226 Difference]: Without dead ends: 32 [2021-11-13 18:41:03,659 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 18:41:03,668 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.37ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:03,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 7.37ms Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 95.33ms Time] [2021-11-13 18:41:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-13 18:41:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-13 18:41:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-13 18:41:03,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2021-11-13 18:41:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:03,733 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-13 18:41:03,733 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-13 18:41:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:41:03,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:03,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:03,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:41:03,740 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2021-11-13 18:41:03,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:03,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948422565] [2021-11-13 18:41:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:03,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:41:03,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:03,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948422565] [2021-11-13 18:41:03,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948422565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:03,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319076910] [2021-11-13 18:41:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:03,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:03,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:03,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:41:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:41:03,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:41:04,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:41:04,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319076910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:04,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:04,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 18:41:04,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134738485] [2021-11-13 18:41:04,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:04,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:41:04,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:41:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:41:04,304 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:04,509 INFO L93 Difference]: Finished difference Result 77 states and 114 transitions. [2021-11-13 18:41:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:41:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-13 18:41:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:04,514 INFO L225 Difference]: With dead ends: 77 [2021-11-13 18:41:04,515 INFO L226 Difference]: Without dead ends: 59 [2021-11-13 18:41:04,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:41:04,519 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.02ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:04,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 12.02ms Time], IncrementalHoareTripleChecker [35 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 137.69ms Time] [2021-11-13 18:41:04,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-13 18:41:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-13 18:41:04,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2021-11-13 18:41:04,533 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 22 [2021-11-13 18:41:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:04,534 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2021-11-13 18:41:04,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2021-11-13 18:41:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:41:04,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:04,538 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:04,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:04,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:04,760 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1687151938, now seen corresponding path program 2 times [2021-11-13 18:41:04,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:04,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363306081] [2021-11-13 18:41:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:04,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:41:04,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:04,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363306081] [2021-11-13 18:41:04,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363306081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:41:04,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:41:04,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:41:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699373540] [2021-11-13 18:41:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:41:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:41:04,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:41:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:41:04,987 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:05,096 INFO L93 Difference]: Finished difference Result 111 states and 162 transitions. [2021-11-13 18:41:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:41:05,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 18:41:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:05,102 INFO L225 Difference]: With dead ends: 111 [2021-11-13 18:41:05,102 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 18:41:05,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:41:05,107 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:05,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 51 Invalid, 58 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 68.09ms Time] [2021-11-13 18:41:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 18:41:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-11-13 18:41:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:05,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-11-13 18:41:05,131 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 58 [2021-11-13 18:41:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:05,132 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-11-13 18:41:05,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-11-13 18:41:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:41:05,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:05,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:05,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:41:05,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:05,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 1 times [2021-11-13 18:41:05,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:05,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447117359] [2021-11-13 18:41:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:05,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:41:05,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:05,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447117359] [2021-11-13 18:41:05,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447117359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:05,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902467391] [2021-11-13 18:41:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:05,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:05,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:05,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:41:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:41:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:41:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:41:05,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902467391] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:05,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:05,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-13 18:41:05,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812086382] [2021-11-13 18:41:05,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:05,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:41:05,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:05,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:41:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:41:05,998 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:06,321 INFO L93 Difference]: Finished difference Result 235 states and 340 transitions. [2021-11-13 18:41:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:41:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-13 18:41:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:06,327 INFO L225 Difference]: With dead ends: 235 [2021-11-13 18:41:06,327 INFO L226 Difference]: Without dead ends: 171 [2021-11-13 18:41:06,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:41:06,334 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.21ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 88 Invalid, 191 Unknown, 0 Unchecked, 8.21ms Time], IncrementalHoareTripleChecker [58 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 254.29ms Time] [2021-11-13 18:41:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-13 18:41:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-13 18:41:06,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.3705882352941177) internal successors, (233), 170 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 233 transitions. [2021-11-13 18:41:06,374 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 233 transitions. Word has length 58 [2021-11-13 18:41:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:06,375 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 233 transitions. [2021-11-13 18:41:06,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 233 transitions. [2021-11-13 18:41:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:41:06,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:06,380 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:06,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:06,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:06,595 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1703650066, now seen corresponding path program 2 times [2021-11-13 18:41:06,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:06,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615423899] [2021-11-13 18:41:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:06,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-13 18:41:06,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:06,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615423899] [2021-11-13 18:41:06,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615423899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:06,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232734760] [2021-11-13 18:41:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:06,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:06,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:06,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:41:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:07,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:41:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-13 18:41:07,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2021-11-13 18:41:08,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232734760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:08,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:08,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-13 18:41:08,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465803959] [2021-11-13 18:41:08,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:41:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:41:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:41:08,046 INFO L87 Difference]: Start difference. First operand 171 states and 233 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:08,694 INFO L93 Difference]: Finished difference Result 511 states and 742 transitions. [2021-11-13 18:41:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:41:08,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-13 18:41:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:08,707 INFO L225 Difference]: With dead ends: 511 [2021-11-13 18:41:08,707 INFO L226 Difference]: Without dead ends: 363 [2021-11-13 18:41:08,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:41:08,716 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 917 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.26ms SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 524.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:08,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 152 Invalid, 437 Unknown, 0 Unchecked, 9.26ms Time], IncrementalHoareTripleChecker [178 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 524.50ms Time] [2021-11-13 18:41:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-13 18:41:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-11-13 18:41:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.37292817679558) internal successors, (497), 362 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 497 transitions. [2021-11-13 18:41:08,788 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 497 transitions. Word has length 130 [2021-11-13 18:41:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:08,788 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 497 transitions. [2021-11-13 18:41:08,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 497 transitions. [2021-11-13 18:41:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-13 18:41:08,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:08,810 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:08,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:09,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:09,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1176972730, now seen corresponding path program 3 times [2021-11-13 18:41:09,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:09,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163602722] [2021-11-13 18:41:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:09,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2021-11-13 18:41:09,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:09,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163602722] [2021-11-13 18:41:09,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163602722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:09,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959042351] [2021-11-13 18:41:09,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:41:09,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:09,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:09,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:41:09,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:41:09,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:09,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:41:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:10,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:41:13,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:41:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-11-13 18:41:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2021-11-13 18:41:13,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:15,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:41:15,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:41:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-13 18:41:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129231578] [2021-11-13 18:41:15,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:41:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:41:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=740, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:41:15,935 INFO L87 Difference]: Start difference. First operand 363 states and 497 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:16,515 INFO L93 Difference]: Finished difference Result 708 states and 990 transitions. [2021-11-13 18:41:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:41:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-11-13 18:41:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:16,521 INFO L225 Difference]: With dead ends: 708 [2021-11-13 18:41:16,522 INFO L226 Difference]: Without dead ends: 392 [2021-11-13 18:41:16,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=450, Invalid=740, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:41:16,531 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 920 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.36ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 419.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:16,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 166 Invalid, 414 Unknown, 0 Unchecked, 9.36ms Time], IncrementalHoareTripleChecker [141 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 419.18ms Time] [2021-11-13 18:41:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-13 18:41:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 379. [2021-11-13 18:41:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.373015873015873) internal successors, (519), 378 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 519 transitions. [2021-11-13 18:41:16,570 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 519 transitions. Word has length 274 [2021-11-13 18:41:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:16,571 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 519 transitions. [2021-11-13 18:41:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 519 transitions. [2021-11-13 18:41:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-13 18:41:16,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:16,580 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:16,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:16,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:16,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 102690091, now seen corresponding path program 4 times [2021-11-13 18:41:16,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:16,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846021957] [2021-11-13 18:41:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:16,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2021-11-13 18:41:17,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:17,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846021957] [2021-11-13 18:41:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846021957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:17,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457559521] [2021-11-13 18:41:17,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:41:17,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:17,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:17,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:17,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:41:17,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:41:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-13 18:41:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:18,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:41:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 111 proven. 2465 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-13 18:41:20,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:22,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 18:41:22,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:41:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 111 proven. 2465 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-13 18:41:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457559521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:23,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:23,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 50, 50] total 97 [2021-11-13 18:41:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486751213] [2021-11-13 18:41:23,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:23,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-13 18:41:23,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-13 18:41:23,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=8179, Unknown=0, NotChecked=0, Total=9312 [2021-11-13 18:41:23,210 INFO L87 Difference]: Start difference. First operand 379 states and 519 transitions. Second operand has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:33,526 INFO L93 Difference]: Finished difference Result 1049 states and 1473 transitions. [2021-11-13 18:41:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-13 18:41:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 286 [2021-11-13 18:41:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:33,544 INFO L225 Difference]: With dead ends: 1049 [2021-11-13 18:41:33,545 INFO L226 Difference]: Without dead ends: 719 [2021-11-13 18:41:33,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 500 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9643 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2619, Invalid=26793, Unknown=0, NotChecked=0, Total=29412 [2021-11-13 18:41:33,559 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 2108 mSDsluCounter, 6339 mSDsCounter, 0 mSdLazyCounter, 13072 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5946.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2108 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 13513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 62.13ms SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 13072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7230.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:33,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2108 Valid, 6486 Invalid, 13513 Unknown, 0 Unchecked, 62.13ms Time], IncrementalHoareTripleChecker [441 Valid, 13072 Invalid, 0 Unknown, 0 Unchecked, 7230.72ms Time] [2021-11-13 18:41:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-11-13 18:41:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 646. [2021-11-13 18:41:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.331782945736434) internal successors, (859), 645 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 859 transitions. [2021-11-13 18:41:33,588 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 859 transitions. Word has length 286 [2021-11-13 18:41:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:33,591 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 859 transitions. [2021-11-13 18:41:33,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 859 transitions. [2021-11-13 18:41:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-13 18:41:33,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:33,600 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:33,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:33,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:41:33,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:33,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1943344616, now seen corresponding path program 1 times [2021-11-13 18:41:33,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:33,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855910877] [2021-11-13 18:41:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:33,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2021-11-13 18:41:34,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855910877] [2021-11-13 18:41:34,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855910877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:34,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538561245] [2021-11-13 18:41:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:34,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:34,435 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:34,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:41:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:34,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:41:34,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2021-11-13 18:41:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2021-11-13 18:41:37,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538561245] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:37,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:37,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-11-13 18:41:37,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682452650] [2021-11-13 18:41:37,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:37,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 18:41:37,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 18:41:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:41:37,108 INFO L87 Difference]: Start difference. First operand 646 states and 859 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:38,776 INFO L93 Difference]: Finished difference Result 1735 states and 2420 transitions. [2021-11-13 18:41:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-13 18:41:38,776 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 298 [2021-11-13 18:41:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:38,787 INFO L225 Difference]: With dead ends: 1735 [2021-11-13 18:41:38,787 INFO L226 Difference]: Without dead ends: 1140 [2021-11-13 18:41:38,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:41:38,790 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2520 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 729.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 944.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:38,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2520 Valid, 334 Invalid, 1037 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [466 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 944.48ms Time] [2021-11-13 18:41:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-11-13 18:41:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2021-11-13 18:41:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.324846356453029) internal successors, (1509), 1139 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1509 transitions. [2021-11-13 18:41:38,835 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1509 transitions. Word has length 298 [2021-11-13 18:41:38,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:38,836 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1509 transitions. [2021-11-13 18:41:38,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 53 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1509 transitions. [2021-11-13 18:41:38,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-11-13 18:41:38,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:38,858 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:38,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:39,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:39,083 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1638381572, now seen corresponding path program 2 times [2021-11-13 18:41:39,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:39,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929123684] [2021-11-13 18:41:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:39,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:41:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2021-11-13 18:41:40,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:41:40,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929123684] [2021-11-13 18:41:40,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929123684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:41:40,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368921752] [2021-11-13 18:41:40,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:41:40,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:40,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:41:40,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:41:40,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:41:41,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:41:41,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:41:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:41:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:41:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2021-11-13 18:41:42,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:41:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 12350 trivial. 0 not checked. [2021-11-13 18:41:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368921752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:41:47,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:41:47,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-11-13 18:41:47,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389110330] [2021-11-13 18:41:47,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:41:47,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-13 18:41:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:41:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-13 18:41:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-13 18:41:47,748 INFO L87 Difference]: Start difference. First operand 1140 states and 1509 transitions. Second operand has 105 states, 105 states have (on average 2.1523809523809523) internal successors, (226), 105 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:41:55,474 INFO L93 Difference]: Finished difference Result 3165 states and 4422 transitions. [2021-11-13 18:41:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-13 18:41:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1523809523809523) internal successors, (226), 105 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 610 [2021-11-13 18:41:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:41:55,491 INFO L225 Difference]: With dead ends: 3165 [2021-11-13 18:41:55,491 INFO L226 Difference]: Without dead ends: 2128 [2021-11-13 18:41:55,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1168 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-13 18:41:55,498 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 4717 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1366.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4717 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.88ms SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1806.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:41:55,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4717 Valid, 656 Invalid, 2033 Unknown, 0 Unchecked, 22.88ms Time], IncrementalHoareTripleChecker [876 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 1806.45ms Time] [2021-11-13 18:41:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-11-13 18:41:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2128. [2021-11-13 18:41:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 1.3206393982134461) internal successors, (2809), 2127 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2809 transitions. [2021-11-13 18:41:55,575 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2809 transitions. Word has length 610 [2021-11-13 18:41:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:41:55,576 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 2809 transitions. [2021-11-13 18:41:55,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1523809523809523) internal successors, (226), 105 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:41:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2809 transitions. [2021-11-13 18:41:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1235 [2021-11-13 18:41:55,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:41:55,647 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:41:55,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:41:55,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:41:55,867 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:41:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:41:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash -949243356, now seen corresponding path program 3 times [2021-11-13 18:41:55,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:41:55,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829859117] [2021-11-13 18:41:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:41:55,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:41:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 62118 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 51714 trivial. 0 not checked. [2021-11-13 18:42:01,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:01,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829859117] [2021-11-13 18:42:01,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829859117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:01,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628737908] [2021-11-13 18:42:01,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:42:01,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:01,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:01,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:01,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:42:02,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:42:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:02,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:42:02,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:03,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-13 18:42:12,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:42:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-11-13 18:42:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 62118 backedges. 405 proven. 607 refuted. 0 times theorem prover too weak. 61106 trivial. 0 not checked. [2021-11-13 18:42:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:42:22,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~i~0#1|] [2021-11-13 18:42:22,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:42:22,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2021-11-13 18:42:22,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530879205] [2021-11-13 18:42:22,669 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:42:22,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-13 18:42:22,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:42:22,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-13 18:42:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6010, Invalid=7100, Unknown=0, NotChecked=0, Total=13110 [2021-11-13 18:42:22,676 INFO L87 Difference]: Start difference. First operand 2128 states and 2809 transitions. Second operand has 105 states, 105 states have (on average 2.142857142857143) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:42:31,842 INFO L93 Difference]: Finished difference Result 4083 states and 5460 transitions. [2021-11-13 18:42:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-13 18:42:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.142857142857143) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1234 [2021-11-13 18:42:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:42:31,858 INFO L225 Difference]: With dead ends: 4083 [2021-11-13 18:42:31,858 INFO L226 Difference]: Without dead ends: 2162 [2021-11-13 18:42:31,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2057 GetRequests, 1944 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6010, Invalid=7100, Unknown=0, NotChecked=0, Total=13110 [2021-11-13 18:42:31,864 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 4939 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1338.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4939 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.56ms SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1745.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:42:31,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4939 Valid, 662 Invalid, 1914 Unknown, 0 Unchecked, 23.56ms Time], IncrementalHoareTripleChecker [749 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1745.86ms Time] [2021-11-13 18:42:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-13 18:42:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 2147. [2021-11-13 18:42:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 1.320596458527493) internal successors, (2834), 2146 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2834 transitions. [2021-11-13 18:42:31,936 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2834 transitions. Word has length 1234 [2021-11-13 18:42:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:42:31,938 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 2834 transitions. [2021-11-13 18:42:31,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.142857142857143) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:42:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2834 transitions. [2021-11-13 18:42:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2021-11-13 18:42:31,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:42:31,961 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:42:31,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 18:42:32,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:32,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:42:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:42:32,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1855199027, now seen corresponding path program 4 times [2021-11-13 18:42:32,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:42:32,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477775878] [2021-11-13 18:42:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:42:32,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:42:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:42:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 63345 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 52736 trivial. 0 not checked. [2021-11-13 18:42:38,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:42:38,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477775878] [2021-11-13 18:42:38,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477775878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:42:38,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601248074] [2021-11-13 18:42:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:42:38,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:42:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:42:38,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:42:38,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:42:38,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:42:38,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:42:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 417 conjunts are in the unsatisfiable core [2021-11-13 18:42:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:42:44,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:43:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 63345 backedges. 511 proven. 52225 refuted. 0 times theorem prover too weak. 10609 trivial. 0 not checked. [2021-11-13 18:43:02,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:43:23,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-11-13 18:43:23,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-13 18:43:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 63345 backedges. 511 proven. 52225 refuted. 0 times theorem prover too weak. 10609 trivial. 0 not checked. [2021-11-13 18:43:25,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601248074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:43:25,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:43:25,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 210, 210] total 417 [2021-11-13 18:43:25,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126548178] [2021-11-13 18:43:25,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:43:25,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 417 states [2021-11-13 18:43:25,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:43:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 417 interpolants. [2021-11-13 18:43:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17413, Invalid=156059, Unknown=0, NotChecked=0, Total=173472 [2021-11-13 18:43:25,153 INFO L87 Difference]: Start difference. First operand 2147 states and 2834 transitions. Second operand has 417 states, 417 states have (on average 4.748201438848921) internal successors, (1980), 417 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:42,505 INFO L93 Difference]: Finished difference Result 5389 states and 7203 transitions. [2021-11-13 18:45:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 527 states. [2021-11-13 18:45:42,508 INFO L78 Accepts]: Start accepts. Automaton has has 417 states, 417 states have (on average 4.748201438848921) internal successors, (1980), 417 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1246 [2021-11-13 18:45:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:42,532 INFO L225 Difference]: With dead ends: 5389 [2021-11-13 18:45:42,532 INFO L226 Difference]: Without dead ends: 3451 [2021-11-13 18:45:42,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2911 GetRequests, 2180 SyntacticMatches, 1 SemanticMatches, 730 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183243 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=36299, Invalid=498793, Unknown=0, NotChecked=0, Total=535092 [2021-11-13 18:45:42,567 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 12659 mSDsluCounter, 119824 mSDsCounter, 0 mSdLazyCounter, 227046 mSolverCounterSat, 2539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78636.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12659 SdHoareTripleChecker+Valid, 120452 SdHoareTripleChecker+Invalid, 229585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 496.27ms SdHoareTripleChecker+Time, 2539 IncrementalHoareTripleChecker+Valid, 227046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95411.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:42,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12659 Valid, 120452 Invalid, 229585 Unknown, 0 Unchecked, 496.27ms Time], IncrementalHoareTripleChecker [2539 Valid, 227046 Invalid, 0 Unknown, 0 Unchecked, 95411.33ms Time] [2021-11-13 18:45:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2021-11-13 18:45:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3297. [2021-11-13 18:45:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 3296 states have (on average 1.335254854368932) internal successors, (4401), 3296 states have internal predecessors, (4401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 4401 transitions. [2021-11-13 18:45:42,861 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 4401 transitions. Word has length 1246 [2021-11-13 18:45:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:42,862 INFO L470 AbstractCegarLoop]: Abstraction has 3297 states and 4401 transitions. [2021-11-13 18:45:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 417 states, 417 states have (on average 4.748201438848921) internal successors, (1980), 417 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:45:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 4401 transitions. [2021-11-13 18:45:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2021-11-13 18:45:42,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:42,890 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 104, 102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:42,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-13 18:45:43,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:43,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:45:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2097119558, now seen corresponding path program 5 times [2021-11-13 18:45:43,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:43,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573827972] [2021-11-13 18:45:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:43,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64584 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53768 trivial. 0 not checked. [2021-11-13 18:45:49,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:49,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573827972] [2021-11-13 18:45:49,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573827972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:49,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99071789] [2021-11-13 18:45:49,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:45:49,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:49,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:49,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499320dc-5c02-47a8-9659-14bdbfb6a4fe/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process