./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G --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 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:23:04,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:23:04,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:23:04,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:23:04,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:23:04,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:23:04,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:23:04,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:23:04,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:23:04,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:23:04,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:23:04,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:23:04,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:23:04,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:23:04,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:23:04,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:23:04,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:23:04,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:23:04,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:23:04,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:23:04,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:23:04,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:23:04,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:23:04,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:23:04,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:23:04,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:23:04,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:23:04,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:23:04,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:23:04,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:23:04,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:23:04,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:23:04,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:23:04,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:23:04,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:23:04,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:23:04,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:23:04,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:23:04,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:23:04,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:23:04,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:23:04,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:23:04,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:23:04,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:23:04,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:23:04,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:23:04,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:23:04,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:23:04,424 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:23:04,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:23:04,425 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:23:04,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:23:04,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:23:04,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:23:04,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:23:04,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:23:04,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:23:04,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:23:04,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:23:04,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:23:04,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:23:04,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:23:04,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:23:04,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:23:04,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:23:04,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:23:04,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:23:04,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:23:04,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:23:04,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:23:04,434 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:23:04,434 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:23:04,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:23:04,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:23:04,435 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_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2021-11-23 12:23:04,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:23:04,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:23:04,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:23:04,783 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:23:04,784 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:23:04,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2021-11-23 12:23:04,891 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/data/1a7232126/320f3345e44d48bdb56c7e9f1769afbd/FLAGbe1a44bc1 [2021-11-23 12:23:05,511 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:23:05,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2021-11-23 12:23:05,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/data/1a7232126/320f3345e44d48bdb56c7e9f1769afbd/FLAGbe1a44bc1 [2021-11-23 12:23:05,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/data/1a7232126/320f3345e44d48bdb56c7e9f1769afbd [2021-11-23 12:23:05,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:23:05,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:23:05,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:23:05,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:23:05,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:23:05,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:23:05" (1/1) ... [2021-11-23 12:23:05,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e6034b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:05, skipping insertion in model container [2021-11-23 12:23:05,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:23:05" (1/1) ... [2021-11-23 12:23:05,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:23:05,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:23:06,140 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2021-11-23 12:23:06,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:23:06,167 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:23:06,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2021-11-23 12:23:06,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:23:06,208 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:23:06,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06 WrapperNode [2021-11-23 12:23:06,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:23:06,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:23:06,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:23:06,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:23:06,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,255 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2021-11-23 12:23:06,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:23:06,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:23:06,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:23:06,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:23:06,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,307 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:23:06,308 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:23:06,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:23:06,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:23:06,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (1/1) ... [2021-11-23 12:23:06,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:23:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:06,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:23:06,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:23:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:23:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:23:06,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:23:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:23:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:23:06,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:23:06,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:23:06,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:23:06,529 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:23:06,534 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:23:06,790 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:23:06,798 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:23:06,799 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 12:23:06,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:23:06 BoogieIcfgContainer [2021-11-23 12:23:06,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:23:06,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:23:06,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:23:06,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:23:06,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:23:05" (1/3) ... [2021-11-23 12:23:06,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632682fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:23:06, skipping insertion in model container [2021-11-23 12:23:06,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:23:06" (2/3) ... [2021-11-23 12:23:06,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632682fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:23:06, skipping insertion in model container [2021-11-23 12:23:06,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:23:06" (3/3) ... [2021-11-23 12:23:06,827 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2021-11-23 12:23:06,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:23:06,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:23:06,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:23:06,949 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 [2021-11-23 12:23:06,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:23:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2021-11-23 12:23:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:23:06,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:06,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:06,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2021-11-23 12:23:06,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868588163] [2021-11-23 12:23:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:06,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:07,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:07,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868588163] [2021-11-23 12:23:07,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868588163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:07,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:07,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:23:07,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605286176] [2021-11-23 12:23:07,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:07,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:07,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:07,261 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 12:23:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:07,294 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 12:23:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:07,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-11-23 12:23:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:07,308 INFO L225 Difference]: With dead ends: 40 [2021-11-23 12:23:07,308 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 12:23:07,311 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 [2021-11-23 12:23:07,317 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:07,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:23:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 12:23:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-23 12:23:07,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-23 12:23:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 12:23:07,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-11-23 12:23:07,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:07,361 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 12:23:07,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 12:23:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 12:23:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:23:07,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:07,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:07,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:23:07,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2021-11-23 12:23:07,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:07,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285962626] [2021-11-23 12:23:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:07,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:23:07,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285962626] [2021-11-23 12:23:07,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285962626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609337605] [2021-11-23 12:23:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:07,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:07,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:07,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:07,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:23:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:23:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:23:07,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:23:07,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609337605] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:07,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:23:07,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 12:23:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346221459] [2021-11-23 12:23:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:07,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:23:07,582 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-11-23 12:23:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:07,612 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-23 12:23:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2021-11-23 12:23:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:07,614 INFO L225 Difference]: With dead ends: 32 [2021-11-23 12:23:07,614 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 12:23:07,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:23:07,617 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:07,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:23:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 12:23:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-23 12:23:07,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2021-11-23 12:23:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 12:23:07,626 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2021-11-23 12:23:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 12:23:07,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-11-23 12:23:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 12:23:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:23:07,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:07,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:07,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:07,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2021-11-23 12:23:07,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:07,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841445162] [2021-11-23 12:23:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:07,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:23:08,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:08,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841445162] [2021-11-23 12:23:08,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841445162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:08,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571462931] [2021-11-23 12:23:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:08,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:08,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:08,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:08,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:23:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:23:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:23:08,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:23:08,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571462931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:08,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:08,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:23:08,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050430427] [2021-11-23 12:23:08,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:08,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:08,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:08,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:08,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:08,349 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-11-23 12:23:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:08,409 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2021-11-23 12:23:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:23:08,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 17 [2021-11-23 12:23:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:08,411 INFO L225 Difference]: With dead ends: 41 [2021-11-23 12:23:08,411 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 12:23:08,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:08,415 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:08,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:23:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 12:23:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 12:23:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-11-23 12:23:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-23 12:23:08,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2021-11-23 12:23:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:08,425 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-23 12:23:08,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-11-23 12:23:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-23 12:23:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 12:23:08,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:08,427 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:08,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:08,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 12:23:08,656 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:08,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2021-11-23 12:23:08,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007643755] [2021-11-23 12:23:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:08,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 12:23:08,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:08,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007643755] [2021-11-23 12:23:08,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007643755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:08,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276275422] [2021-11-23 12:23:08,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:23:08,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:08,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:08,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:08,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:23:08,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:23:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:23:08,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 12:23:08,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 12:23:08,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276275422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:08,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:08,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:23:08,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367391903] [2021-11-23 12:23:08,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:08,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:23:08,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:23:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:08,987 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2021-11-23 12:23:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:09,046 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2021-11-23 12:23:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:23:09,046 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 23 [2021-11-23 12:23:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:09,048 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:23:09,048 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 12:23:09,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:23:09,050 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:09,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:23:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 12:23:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-23 12:23:09,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2021-11-23 12:23:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-23 12:23:09,060 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2021-11-23 12:23:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:09,061 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-23 12:23:09,061 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) [2021-11-23 12:23:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-23 12:23:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 12:23:09,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:09,063 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:09,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 12:23:09,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:09,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:09,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2021-11-23 12:23:09,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:09,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6858158] [2021-11-23 12:23:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:09,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:09,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:09,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6858158] [2021-11-23 12:23:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6858158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:09,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73870288] [2021-11-23 12:23:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:23:09,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:09,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:09,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:09,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:23:09,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 12:23:09,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:23:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:09,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:09,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73870288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:09,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:09,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-23 12:23:09,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526479958] [2021-11-23 12:23:09,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:09,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 12:23:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 12:23:09,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:23:09,879 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2021-11-23 12:23:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:09,950 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-11-23 12:23:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:23:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 35 [2021-11-23 12:23:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:09,954 INFO L225 Difference]: With dead ends: 77 [2021-11-23 12:23:09,954 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 12:23:09,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:23:09,959 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:09,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:23:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 12:23:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 12:23:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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) [2021-11-23 12:23:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-23 12:23:09,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2021-11-23 12:23:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:09,974 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-23 12:23:09,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2021-11-23 12:23:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-23 12:23:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 12:23:09,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:09,976 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:10,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 12:23:10,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:10,179 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2021-11-23 12:23:10,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:10,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574546834] [2021-11-23 12:23:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:10,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:10,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574546834] [2021-11-23 12:23:10,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574546834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491039111] [2021-11-23 12:23:10,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:23:10,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:10,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:10,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:10,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:23:10,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:23:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:10,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:23:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:10,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491039111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:10,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:10,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-23 12:23:10,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529664743] [2021-11-23 12:23:10,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:10,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 12:23:10,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:10,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 12:23:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:23:10,935 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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) [2021-11-23 12:23:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:11,050 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-11-23 12:23:11,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:23:11,051 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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 47 [2021-11-23 12:23:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:11,053 INFO L225 Difference]: With dead ends: 101 [2021-11-23 12:23:11,054 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 12:23:11,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:23:11,055 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:11,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:23:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 12:23:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-23 12:23:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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) [2021-11-23 12:23:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-23 12:23:11,079 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2021-11-23 12:23:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:11,080 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-23 12:23:11,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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) [2021-11-23 12:23:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-23 12:23:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 12:23:11,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:11,084 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:11,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:11,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 12:23:11,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2021-11-23 12:23:11,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:11,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665418837] [2021-11-23 12:23:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:11,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 12:23:11,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665418837] [2021-11-23 12:23:11,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665418837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158078859] [2021-11-23 12:23:11,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:23:11,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:11,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:23:14,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-23 12:23:14,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:23:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:14,304 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-11-23 12:23:14,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-11-23 12:23:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158078859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:14,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2021-11-23 12:23:14,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149738340] [2021-11-23 12:23:14,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:14,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 12:23:14,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 12:23:14,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 12:23:14,499 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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) [2021-11-23 12:23:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:14,692 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2021-11-23 12:23:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 12:23:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 71 [2021-11-23 12:23:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:14,702 INFO L225 Difference]: With dead ends: 128 [2021-11-23 12:23:14,702 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 12:23:14,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 12:23:14,705 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:14,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 68 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:23:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 12:23:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-11-23 12:23:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 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) [2021-11-23 12:23:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-11-23 12:23:14,733 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 71 [2021-11-23 12:23:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:14,733 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-11-23 12:23:14,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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) [2021-11-23 12:23:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-11-23 12:23:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 12:23:14,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:14,740 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:14,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:14,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 12:23:14,963 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2043147451, now seen corresponding path program 6 times [2021-11-23 12:23:14,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:14,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946576219] [2021-11-23 12:23:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:14,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-11-23 12:23:15,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:15,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946576219] [2021-11-23 12:23:15,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946576219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:15,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857453679] [2021-11-23 12:23:15,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:23:15,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:15,437 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:15,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:23:42,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-23 12:23:42,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:23:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-23 12:23:42,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2021-11-23 12:23:43,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857453679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:43,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:43,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 48 [2021-11-23 12:23:43,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324768611] [2021-11-23 12:23:43,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:43,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 12:23:43,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 12:23:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:23:43,420 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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) [2021-11-23 12:23:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:43,762 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2021-11-23 12:23:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 12:23:43,763 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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 97 [2021-11-23 12:23:43,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:43,765 INFO L225 Difference]: With dead ends: 202 [2021-11-23 12:23:43,765 INFO L226 Difference]: Without dead ends: 151 [2021-11-23 12:23:43,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:23:43,769 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:43,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 86 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:23:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-23 12:23:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-23 12:23:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 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) [2021-11-23 12:23:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2021-11-23 12:23:43,805 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 97 [2021-11-23 12:23:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:43,809 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2021-11-23 12:23:43,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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) [2021-11-23 12:23:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2021-11-23 12:23:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 12:23:43,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:43,816 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:43,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:44,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:44,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 163678547, now seen corresponding path program 7 times [2021-11-23 12:23:44,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117374045] [2021-11-23 12:23:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:44,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:44,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117374045] [2021-11-23 12:23:44,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117374045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:44,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671762488] [2021-11-23 12:23:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:23:44,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:44,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:44,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:23:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:44,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 12:23:44,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:45,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671762488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:46,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:46,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2021-11-23 12:23:46,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779788008] [2021-11-23 12:23:46,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 12:23:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 12:23:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:23:46,244 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2021-11-23 12:23:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:46,451 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2021-11-23 12:23:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 12:23:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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 147 [2021-11-23 12:23:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:46,454 INFO L225 Difference]: With dead ends: 301 [2021-11-23 12:23:46,454 INFO L226 Difference]: Without dead ends: 202 [2021-11-23 12:23:46,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 12:23:46,463 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:46,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 82 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:23:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-23 12:23:46,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-11-23 12:23:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 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) [2021-11-23 12:23:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2021-11-23 12:23:46,493 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 147 [2021-11-23 12:23:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:46,493 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2021-11-23 12:23:46,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 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) [2021-11-23 12:23:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2021-11-23 12:23:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-23 12:23:46,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:46,502 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:46,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:46,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:23:46,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:46,720 INFO L85 PathProgramCache]: Analyzing trace with hash -776127201, now seen corresponding path program 8 times [2021-11-23 12:23:46,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:46,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195797558] [2021-11-23 12:23:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:46,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:48,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195797558] [2021-11-23 12:23:48,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195797558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:48,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781798271] [2021-11-23 12:23:48,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:23:48,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:48,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:48,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:48,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:23:48,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:23:48,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 12:23:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:48,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:52,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781798271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:52,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:52,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2021-11-23 12:23:52,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213302218] [2021-11-23 12:23:52,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:52,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-23 12:23:52,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-23 12:23:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 12:23:52,188 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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) [2021-11-23 12:23:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:52,651 INFO L93 Difference]: Finished difference Result 405 states and 462 transitions. [2021-11-23 12:23:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-23 12:23:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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 199 [2021-11-23 12:23:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:52,655 INFO L225 Difference]: With dead ends: 405 [2021-11-23 12:23:52,655 INFO L226 Difference]: Without dead ends: 306 [2021-11-23 12:23:52,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-23 12:23:52,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:52,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 82 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:23:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-23 12:23:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2021-11-23 12:23:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 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) [2021-11-23 12:23:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2021-11-23 12:23:52,675 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 199 [2021-11-23 12:23:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:52,676 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2021-11-23 12:23:52,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 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) [2021-11-23 12:23:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2021-11-23 12:23:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-23 12:23:52,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:52,682 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:52,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:52,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:23:52,895 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -148538697, now seen corresponding path program 9 times [2021-11-23 12:23:52,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:52,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096249296] [2021-11-23 12:23:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:52,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-23 12:23:57,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096249296] [2021-11-23 12:23:57,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096249296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441069704] [2021-11-23 12:23:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:23:57,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:57,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:57,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:26:31,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-23 12:26:31,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:26:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 12:26:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2021-11-23 12:26:32,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2021-11-23 12:26:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441069704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:26:34,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:26:34,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 25, 25] total 151 [2021-11-23 12:26:34,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891795278] [2021-11-23 12:26:34,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:26:34,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-11-23 12:26:34,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:26:34,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-11-23 12:26:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2021-11-23 12:26:34,392 INFO L87 Difference]: Start difference. First operand 306 states and 309 transitions. Second operand has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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) [2021-11-23 12:26:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:35,097 INFO L93 Difference]: Finished difference Result 504 states and 558 transitions. [2021-11-23 12:26:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-23 12:26:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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 303 [2021-11-23 12:26:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:35,100 INFO L225 Difference]: With dead ends: 504 [2021-11-23 12:26:35,100 INFO L226 Difference]: Without dead ends: 405 [2021-11-23 12:26:35,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2021-11-23 12:26:35,105 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 303 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:35,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 128 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:26:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-23 12:26:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2021-11-23 12:26:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 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) [2021-11-23 12:26:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2021-11-23 12:26:35,118 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 303 [2021-11-23 12:26:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:35,119 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2021-11-23 12:26:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 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) [2021-11-23 12:26:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2021-11-23 12:26:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-23 12:26:35,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:35,126 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:35,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:35,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:26:35,343 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:26:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 521897749, now seen corresponding path program 10 times [2021-11-23 12:26:35,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:26:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673225112] [2021-11-23 12:26:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:35,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:26:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:26:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2021-11-23 12:26:39,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:26:39,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673225112] [2021-11-23 12:26:39,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673225112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:26:39,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150443673] [2021-11-23 12:26:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:26:39,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:26:39,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:26:39,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:26:39,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:26:39,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:26:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:26:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-23 12:26:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:26:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2021-11-23 12:26:40,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:26:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2021-11-23 12:26:50,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150443673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:26:50,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:26:50,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2021-11-23 12:26:50,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017527922] [2021-11-23 12:26:50,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:26:50,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2021-11-23 12:26:50,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:26:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2021-11-23 12:26:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2021-11-23 12:26:51,005 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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) [2021-11-23 12:26:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:26:51,985 INFO L93 Difference]: Finished difference Result 809 states and 919 transitions. [2021-11-23 12:26:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-11-23 12:26:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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 401 [2021-11-23 12:26:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:26:51,989 INFO L225 Difference]: With dead ends: 809 [2021-11-23 12:26:51,989 INFO L226 Difference]: Without dead ends: 614 [2021-11-23 12:26:51,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2021-11-23 12:26:51,994 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:26:51,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 66 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:26:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-11-23 12:26:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-11-23 12:26:52,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.0065252854812399) internal successors, (617), 613 states have internal predecessors, (617), 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) [2021-11-23 12:26:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 617 transitions. [2021-11-23 12:26:52,014 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 617 transitions. Word has length 401 [2021-11-23 12:26:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:26:52,014 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 617 transitions. [2021-11-23 12:26:52,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 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) [2021-11-23 12:26:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 617 transitions. [2021-11-23 12:26:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-11-23 12:26:52,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:26:52,030 INFO L514 BasicCegarLoop]: trace histogram [208, 208, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:26:52,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:26:52,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:26:52,243 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:26:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:26:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1397788285, now seen corresponding path program 11 times [2021-11-23 12:26:52,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:26:52,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041510826] [2021-11-23 12:26:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:26:52,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:26:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:27:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 47496 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2021-11-23 12:27:06,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:27:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041510826] [2021-11-23 12:27:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041510826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:27:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679670764] [2021-11-23 12:27:06,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:27:06,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:27:06,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:27:06,880 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:27:06,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e363e45-40bc-4faa-9a15-cf378d4a7174/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process