./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY --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 c82f9f6b2ddd9cc29ac088c74e4e84d5622d389d0c95b67e6fa7eaa0a2f36f61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:10:10,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:10:10,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:10:10,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:10:10,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:10:10,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:10:10,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:10:10,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:10:10,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:10:10,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:10:10,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:10:10,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:10:10,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:10:10,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:10:10,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:10:10,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:10:10,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:10:10,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:10:10,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:10:10,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:10:10,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:10:10,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:10:10,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:10:10,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:10:10,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:10:10,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:10:10,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:10:10,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:10:10,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:10:10,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:10:10,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:10:10,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:10:10,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:10:10,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:10:10,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:10:10,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:10:10,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:10:10,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:10:10,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:10:10,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:10:10,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:10:10,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:10:10,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:10:10,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:10:10,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:10:10,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:10:10,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:10:10,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:10:10,343 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:10:10,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:10:10,344 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:10:10,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:10:10,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:10:10,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:10:10,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:10:10,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:10:10,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:10:10,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:10:10,346 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:10:10,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:10:10,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:10:10,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:10:10,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:10:10,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:10:10,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:10:10,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:10:10,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:10:10,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:10:10,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:10:10,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:10:10,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:10:10,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:10:10,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:10:10,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:10:10,350 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_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c82f9f6b2ddd9cc29ac088c74e4e84d5622d389d0c95b67e6fa7eaa0a2f36f61 [2021-11-07 08:10:10,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:10:10,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:10:10,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:10:10,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:10:10,675 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:10:10,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2021-11-07 08:10:10,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/data/90dcf42c3/d0f4a288015246f4ac28dc498c4d366e/FLAGece6da816 [2021-11-07 08:10:11,226 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:10:11,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2021-11-07 08:10:11,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/data/90dcf42c3/d0f4a288015246f4ac28dc498c4d366e/FLAGece6da816 [2021-11-07 08:10:11,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/data/90dcf42c3/d0f4a288015246f4ac28dc498c4d366e [2021-11-07 08:10:11,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:10:11,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:10:11,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:10:11,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:10:11,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:10:11,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:11,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418ee530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11, skipping insertion in model container [2021-11-07 08:10:11,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:11,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:10:11,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:10:11,912 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] [2021-11-07 08:10:11,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:10:11,949 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:10:11,964 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] [2021-11-07 08:10:11,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:10:11,995 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:10:11,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11 WrapperNode [2021-11-07 08:10:11,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:10:11,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:10:11,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:10:11,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:10:12,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:10:12,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:10:12,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:10:12,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:10:12,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:10:12,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:10:12,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:10:12,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:10:12,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (1/1) ... [2021-11-07 08:10:12,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:10:12,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:12,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:10:12,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:10:12,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:10:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:10:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:10:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:10:12,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:10:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:10:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:10:12,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:10:12,435 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 08:10:12,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:12 BoogieIcfgContainer [2021-11-07 08:10:12,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:10:12,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:10:12,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:10:12,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:10:12,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:10:11" (1/3) ... [2021-11-07 08:10:12,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cba11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:12, skipping insertion in model container [2021-11-07 08:10:12,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:10:11" (2/3) ... [2021-11-07 08:10:12,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cba11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:10:12, skipping insertion in model container [2021-11-07 08:10:12,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:10:12" (3/3) ... [2021-11-07 08:10:12,446 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2021-11-07 08:10:12,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:10:12,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:10:12,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:10:12,531 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 [2021-11-07 08:10:12,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:10:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-11-07 08:10:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:10:12,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:12,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:12,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2021-11-07 08:10:12,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:12,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60654533] [2021-11-07 08:10:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:12,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:12,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:12,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60654533] [2021-11-07 08:10:12,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60654533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:12,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:10:12,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:10:12,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250207085] [2021-11-07 08:10:12,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:10:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:10:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:10:12,846 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 08:10:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:12,920 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-11-07 08:10:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:10:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-07 08:10:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:12,929 INFO L225 Difference]: With dead ends: 36 [2021-11-07 08:10:12,943 INFO L226 Difference]: Without dead ends: 17 [2021-11-07 08:10:12,947 INFO L786 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 [2021-11-07 08:10:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-07 08:10:13,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-07 08:10:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-07 08:10:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-07 08:10:13,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-07 08:10:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:13,007 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-07 08:10:13,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-07 08:10:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-07 08:10:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:10:13,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:13,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:13,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:10:13,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2021-11-07 08:10:13,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:13,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20986735] [2021-11-07 08:10:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:10:13,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:13,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20986735] [2021-11-07 08:10:13,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20986735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:13,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336576065] [2021-11-07 08:10:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:13,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:13,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:10:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:10:13,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:13,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336576065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:10:13,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:10:13,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:10:13,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317996184] [2021-11-07 08:10:13,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:10:13,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:13,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:10:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:10:13,249 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. 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) [2021-11-07 08:10:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:13,263 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-07 08:10:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:10:13,264 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 [2021-11-07 08:10:13,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:13,265 INFO L225 Difference]: With dead ends: 26 [2021-11-07 08:10:13,265 INFO L226 Difference]: Without dead ends: 19 [2021-11-07 08:10:13,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:10:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-07 08:10:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-11-07 08:10:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2021-11-07 08:10:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-07 08:10:13,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-11-07 08:10:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:13,270 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-07 08:10:13,271 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) [2021-11-07 08:10:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-07 08:10:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:10:13,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:13,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:13,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:13,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:13,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:13,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2021-11-07 08:10:13,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:13,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485758454] [2021-11-07 08:10:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:13,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:13,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485758454] [2021-11-07 08:10:13,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485758454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:13,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615859731] [2021-11-07 08:10:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:13,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:13,547 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:13,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:10:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:10:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615859731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:13,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:13,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:10:13,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032189260] [2021-11-07 08:10:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:10:13,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:10:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:10:13,673 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-07 08:10:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:13,691 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-07 08:10:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:10:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 14 [2021-11-07 08:10:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:13,693 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:10:13,693 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:10:13,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:10:13,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:10:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-07 08:10:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-07 08:10:13,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2021-11-07 08:10:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-07 08:10:13,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2021-11-07 08:10:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-07 08:10:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:10:13,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:13,700 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:13,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:13,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:13,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1501972051, now seen corresponding path program 2 times [2021-11-07 08:10:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170790576] [2021-11-07 08:10:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:13,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:10:14,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:14,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170790576] [2021-11-07 08:10:14,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170790576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:14,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067655730] [2021-11-07 08:10:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:14,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:14,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:14,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:10:14,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:14,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:10:14,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:10:14,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067655730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:14,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:14,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-07 08:10:14,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639698323] [2021-11-07 08:10:14,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:10:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:10:14,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:10:14,203 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-07 08:10:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:14,262 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-07 08:10:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:10:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 16 [2021-11-07 08:10:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:14,266 INFO L225 Difference]: With dead ends: 39 [2021-11-07 08:10:14,266 INFO L226 Difference]: Without dead ends: 27 [2021-11-07 08:10:14,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:10:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-07 08:10:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2021-11-07 08:10:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-07 08:10:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-07 08:10:14,281 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-11-07 08:10:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:14,281 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-07 08:10:14,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2021-11-07 08:10:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-07 08:10:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 08:10:14,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:14,283 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:14,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:14,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-07 08:10:14,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1207096048, now seen corresponding path program 3 times [2021-11-07 08:10:14,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:14,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347973276] [2021-11-07 08:10:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:14,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:10:14,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347973276] [2021-11-07 08:10:14,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347973276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:14,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947722834] [2021-11-07 08:10:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:14,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:14,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:14,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:10:14,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:10:14,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:14,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:10:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:10:14,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947722834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:14,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:14,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-07 08:10:14,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92940727] [2021-11-07 08:10:14,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:10:14,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:14,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:10:14,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:10:14,765 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:14,805 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-11-07 08:10:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:10:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-07 08:10:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:14,807 INFO L225 Difference]: With dead ends: 47 [2021-11-07 08:10:14,807 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:10:14,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:10:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:10:14,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-07 08:10:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2021-11-07 08:10:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-11-07 08:10:14,812 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 21 [2021-11-07 08:10:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:14,812 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-11-07 08:10:14,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-11-07 08:10:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:10:14,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:14,813 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:14,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:15,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:15,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:15,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1223744631, now seen corresponding path program 4 times [2021-11-07 08:10:15,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:15,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720886203] [2021-11-07 08:10:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:15,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:10:15,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:15,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720886203] [2021-11-07 08:10:15,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720886203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:15,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511201033] [2021-11-07 08:10:15,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:15,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:15,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:15,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:10:15,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:15,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:10:15,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:10:15,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511201033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:15,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:15,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 08:10:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671198388] [2021-11-07 08:10:15,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:10:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:10:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:15,274 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-07 08:10:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:15,296 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-11-07 08:10:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:10:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) Word has length 26 [2021-11-07 08:10:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:15,298 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:10:15,298 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:10:15,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:10:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:10:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-07 08:10:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-11-07 08:10:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-07 08:10:15,303 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 26 [2021-11-07 08:10:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:15,303 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-07 08:10:15,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-07 08:10:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-07 08:10:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:10:15,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:15,305 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:15,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:15,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:15,532 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash -403565831, now seen corresponding path program 5 times [2021-11-07 08:10:15,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:15,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406911404] [2021-11-07 08:10:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:15,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:10:15,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:15,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406911404] [2021-11-07 08:10:15,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406911404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:15,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887794165] [2021-11-07 08:10:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:15,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:15,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:15,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:10:15,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 08:10:15,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:15,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:10:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:10:15,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887794165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:15,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-11-07 08:10:15,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468544265] [2021-11-07 08:10:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:10:15,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:10:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:15,876 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2021-11-07 08:10:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:15,945 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-11-07 08:10:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:10:15,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 28 [2021-11-07 08:10:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:15,949 INFO L225 Difference]: With dead ends: 57 [2021-11-07 08:10:15,949 INFO L226 Difference]: Without dead ends: 39 [2021-11-07 08:10:15,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-07 08:10:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-11-07 08:10:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-07 08:10:15,961 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2021-11-07 08:10:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:15,961 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-07 08:10:15,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2021-11-07 08:10:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-07 08:10:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:10:15,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:15,963 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:15,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:16,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 08:10:16,184 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1934839690, now seen corresponding path program 6 times [2021-11-07 08:10:16,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964430698] [2021-11-07 08:10:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:16,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 08:10:16,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:16,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964430698] [2021-11-07 08:10:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964430698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:16,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779233435] [2021-11-07 08:10:16,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:16,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:16,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:16,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:10:16,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:10:16,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:10:16,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-07 08:10:16,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779233435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:16,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:16,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-07 08:10:16,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155828488] [2021-11-07 08:10:16,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:10:16,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:10:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:16,520 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:16,593 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-11-07 08:10:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:10:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 08:10:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:16,594 INFO L225 Difference]: With dead ends: 65 [2021-11-07 08:10:16,595 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:10:16,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:10:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-11-07 08:10:16,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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) [2021-11-07 08:10:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-07 08:10:16,601 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 33 [2021-11-07 08:10:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:16,601 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-07 08:10:16,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-07 08:10:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:10:16,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:16,603 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:16,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:16,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:16,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:16,820 INFO L85 PathProgramCache]: Analyzing trace with hash 172781213, now seen corresponding path program 7 times [2021-11-07 08:10:16,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:16,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065732833] [2021-11-07 08:10:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:16,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 08:10:16,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:16,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065732833] [2021-11-07 08:10:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065732833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:16,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649524743] [2021-11-07 08:10:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:16,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:16,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:10:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:10:17,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 08:10:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649524743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:17,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:17,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 08:10:17,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236387118] [2021-11-07 08:10:17,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:10:17,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:10:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:10:17,163 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-11-07 08:10:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:17,209 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2021-11-07 08:10:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:10:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 38 [2021-11-07 08:10:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:17,210 INFO L225 Difference]: With dead ends: 68 [2021-11-07 08:10:17,211 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:10:17,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:10:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:10:17,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-07 08:10:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 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) [2021-11-07 08:10:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-11-07 08:10:17,223 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 38 [2021-11-07 08:10:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:17,224 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-11-07 08:10:17,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2021-11-07 08:10:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-11-07 08:10:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:10:17,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:17,226 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:17,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:17,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:17,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash -239734241, now seen corresponding path program 8 times [2021-11-07 08:10:17,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:17,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606009309] [2021-11-07 08:10:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:17,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 08:10:17,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:17,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606009309] [2021-11-07 08:10:17,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606009309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:17,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228937670] [2021-11-07 08:10:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:17,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:17,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:17,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:10:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:10:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 08:10:17,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228937670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:17,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:17,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:10:17,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843708770] [2021-11-07 08:10:17,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:10:17,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:10:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:17,801 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2021-11-07 08:10:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:17,831 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-11-07 08:10:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:10:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 40 [2021-11-07 08:10:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:17,834 INFO L225 Difference]: With dead ends: 70 [2021-11-07 08:10:17,834 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:10:17,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:10:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:10:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-07 08:10:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-07 08:10:17,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 40 [2021-11-07 08:10:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:17,845 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-07 08:10:17,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2021-11-07 08:10:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-07 08:10:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:10:17,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:17,847 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:17,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:10:18,056 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:18,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1530094303, now seen corresponding path program 9 times [2021-11-07 08:10:18,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:18,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645798540] [2021-11-07 08:10:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:18,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-07 08:10:18,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:18,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645798540] [2021-11-07 08:10:18,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645798540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:18,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330924120] [2021-11-07 08:10:18,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:18,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:18,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:18,177 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:10:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:10:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:10:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-07 08:10:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330924120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:18,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-07 08:10:18,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609379081] [2021-11-07 08:10:18,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:10:18,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:10:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:18,480 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 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) [2021-11-07 08:10:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:18,550 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-11-07 08:10:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:10:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 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 42 [2021-11-07 08:10:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:18,555 INFO L225 Difference]: With dead ends: 77 [2021-11-07 08:10:18,556 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:10:18,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:10:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-07 08:10:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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) [2021-11-07 08:10:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-07 08:10:18,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2021-11-07 08:10:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-07 08:10:18,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 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) [2021-11-07 08:10:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-07 08:10:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:10:18,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:18,578 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:18,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:18,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:18,793 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1935274014, now seen corresponding path program 10 times [2021-11-07 08:10:18,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:18,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335167836] [2021-11-07 08:10:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:18,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:10:18,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:18,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335167836] [2021-11-07 08:10:18,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335167836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:18,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426326943] [2021-11-07 08:10:18,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:18,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:18,920 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:18,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:10:19,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:19,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:10:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:10:19,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426326943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:19,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 08:10:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272394522] [2021-11-07 08:10:19,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:10:19,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:10:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:19,183 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:19,221 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-11-07 08:10:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:10:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 08:10:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:19,223 INFO L225 Difference]: With dead ends: 80 [2021-11-07 08:10:19,223 INFO L226 Difference]: Without dead ends: 53 [2021-11-07 08:10:19,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:10:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-07 08:10:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-11-07 08:10:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 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) [2021-11-07 08:10:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-11-07 08:10:19,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 47 [2021-11-07 08:10:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:19,241 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-11-07 08:10:19,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-11-07 08:10:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:10:19,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:19,243 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:19,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:19,468 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 11 times [2021-11-07 08:10:19,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:19,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262871593] [2021-11-07 08:10:19,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:19,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:10:19,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:19,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262871593] [2021-11-07 08:10:19,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262871593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:19,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960721881] [2021-11-07 08:10:19,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:19,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:19,618 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:19,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:10:19,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 08:10:19,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:10:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:10:19,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960721881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:19,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:19,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 08:10:19,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970229185] [2021-11-07 08:10:19,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:10:19,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:19,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:10:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:10:19,989 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2021-11-07 08:10:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:20,029 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-11-07 08:10:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:10:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 49 [2021-11-07 08:10:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:20,039 INFO L225 Difference]: With dead ends: 82 [2021-11-07 08:10:20,039 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 08:10:20,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:10:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 08:10:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-11-07 08:10:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 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) [2021-11-07 08:10:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-11-07 08:10:20,044 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 49 [2021-11-07 08:10:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:20,044 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-11-07 08:10:20,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2021-11-07 08:10:20,045 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-11-07 08:10:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 08:10:20,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:20,046 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:20,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:20,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:20,264 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash -363334178, now seen corresponding path program 12 times [2021-11-07 08:10:20,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:20,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712931800] [2021-11-07 08:10:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:20,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-07 08:10:20,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:20,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712931800] [2021-11-07 08:10:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712931800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:20,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035880611] [2021-11-07 08:10:20,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:20,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:20,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:20,406 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:20,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:10:20,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:10:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:10:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 08:10:20,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035880611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:20,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:20,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-11-07 08:10:20,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190205698] [2021-11-07 08:10:20,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:10:20,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:10:20,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:10:20,877 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2021-11-07 08:10:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:20,960 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-07 08:10:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:10:20,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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 51 [2021-11-07 08:10:20,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:20,961 INFO L225 Difference]: With dead ends: 89 [2021-11-07 08:10:20,961 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:10:20,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:10:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:10:20,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-11-07 08:10:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 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) [2021-11-07 08:10:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-11-07 08:10:20,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 51 [2021-11-07 08:10:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:20,966 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-11-07 08:10:20,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 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) [2021-11-07 08:10:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-11-07 08:10:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:10:20,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:20,968 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:21,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:21,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:21,184 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1122895031, now seen corresponding path program 13 times [2021-11-07 08:10:21,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:21,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050068641] [2021-11-07 08:10:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:21,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:21,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050068641] [2021-11-07 08:10:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050068641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:21,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173657820] [2021-11-07 08:10:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:21,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:21,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:21,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:10:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:10:21,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173657820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:21,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:21,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 08:10:21,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503705922] [2021-11-07 08:10:21,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:10:21,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:10:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:10:21,693 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-07 08:10:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:21,733 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-11-07 08:10:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:10:21,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 08:10:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:21,734 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:10:21,734 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:10:21,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:10:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:10:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-07 08:10:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 60 states have internal predecessors, (70), 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) [2021-11-07 08:10:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-07 08:10:21,739 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 56 [2021-11-07 08:10:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:21,739 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-07 08:10:21,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-11-07 08:10:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-07 08:10:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:10:21,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:21,741 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:21,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:21,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:10:21,956 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1664720309, now seen corresponding path program 14 times [2021-11-07 08:10:21,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:21,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455632957] [2021-11-07 08:10:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:21,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:22,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:22,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455632957] [2021-11-07 08:10:22,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455632957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:22,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629593499] [2021-11-07 08:10:22,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:22,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:22,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:22,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:22,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:10:22,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:10:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:22,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629593499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:22,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:22,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 08:10:22,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790169376] [2021-11-07 08:10:22,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:10:22,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:10:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:22,474 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2021-11-07 08:10:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:22,524 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2021-11-07 08:10:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:10:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:10:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:22,527 INFO L225 Difference]: With dead ends: 94 [2021-11-07 08:10:22,527 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 08:10:22,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:10:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 08:10:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-07 08:10:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 62 states have internal predecessors, (72), 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) [2021-11-07 08:10:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-07 08:10:22,533 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 58 [2021-11-07 08:10:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:22,534 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-07 08:10:22,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2021-11-07 08:10:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-07 08:10:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:10:22,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:22,535 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:22,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:22,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:10:22,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1627197645, now seen corresponding path program 15 times [2021-11-07 08:10:22,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:22,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466226127] [2021-11-07 08:10:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:22,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 08:10:22,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:22,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466226127] [2021-11-07 08:10:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466226127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:22,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993540345] [2021-11-07 08:10:22,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:22,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:22,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:22,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:10:23,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:10:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:10:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-07 08:10:23,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993540345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:23,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:23,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2021-11-07 08:10:23,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245459701] [2021-11-07 08:10:23,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:10:23,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:10:23,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:10:23,392 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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) [2021-11-07 08:10:23,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:23,484 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2021-11-07 08:10:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:10:23,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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 60 [2021-11-07 08:10:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:23,486 INFO L225 Difference]: With dead ends: 101 [2021-11-07 08:10:23,486 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:10:23,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:10:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:10:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-07 08:10:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 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) [2021-11-07 08:10:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-11-07 08:10:23,492 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 60 [2021-11-07 08:10:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:23,492 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-11-07 08:10:23,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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) [2021-11-07 08:10:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-11-07 08:10:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:10:23,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:23,494 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:23,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:10:23,708 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -220128970, now seen corresponding path program 16 times [2021-11-07 08:10:23,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:23,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892974268] [2021-11-07 08:10:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:23,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:10:23,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:23,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892974268] [2021-11-07 08:10:23,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892974268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:23,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821156190] [2021-11-07 08:10:23,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:23,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:23,916 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:23,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:10:24,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:10:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:10:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821156190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:24,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 08:10:24,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089755656] [2021-11-07 08:10:24,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:10:24,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:10:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:10:24,310 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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) [2021-11-07 08:10:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:24,380 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-11-07 08:10:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:10:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 65 [2021-11-07 08:10:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:24,382 INFO L225 Difference]: With dead ends: 104 [2021-11-07 08:10:24,382 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:10:24,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:10:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:10:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-07 08:10:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 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) [2021-11-07 08:10:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-11-07 08:10:24,387 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 65 [2021-11-07 08:10:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:24,387 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-11-07 08:10:24,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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) [2021-11-07 08:10:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-11-07 08:10:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:10:24,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:24,389 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:24,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:24,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:10:24,612 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash -222071692, now seen corresponding path program 17 times [2021-11-07 08:10:24,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:24,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725185067] [2021-11-07 08:10:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:24,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:10:24,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:24,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725185067] [2021-11-07 08:10:24,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725185067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:24,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820929519] [2021-11-07 08:10:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:24,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:24,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:24,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:10:25,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 08:10:25,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:10:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:10:25,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820929519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:25,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:25,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 08:10:25,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854194956] [2021-11-07 08:10:25,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:10:25,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:10:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:10:25,486 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-11-07 08:10:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:25,536 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2021-11-07 08:10:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:10:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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 67 [2021-11-07 08:10:25,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:25,537 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:10:25,537 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 08:10:25,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:10:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 08:10:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-07 08:10:25,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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) [2021-11-07 08:10:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-07 08:10:25,542 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 67 [2021-11-07 08:10:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:25,542 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-07 08:10:25,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 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) [2021-11-07 08:10:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-07 08:10:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:10:25,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:25,543 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:25,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:25,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:25,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2089027534, now seen corresponding path program 18 times [2021-11-07 08:10:25,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:25,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59551011] [2021-11-07 08:10:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:25,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-07 08:10:26,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:26,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59551011] [2021-11-07 08:10:26,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59551011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:26,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448925181] [2021-11-07 08:10:26,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:26,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:26,028 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:26,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:10:26,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-07 08:10:26,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:10:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 08:10:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448925181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:26,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:26,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-07 08:10:26,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490034138] [2021-11-07 08:10:26,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:10:26,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:10:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:10:26,776 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 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) [2021-11-07 08:10:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:26,885 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2021-11-07 08:10:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:10:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 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 69 [2021-11-07 08:10:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:26,887 INFO L225 Difference]: With dead ends: 113 [2021-11-07 08:10:26,887 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:10:26,888 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:10:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:10:26,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-07 08:10:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 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) [2021-11-07 08:10:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2021-11-07 08:10:26,891 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 69 [2021-11-07 08:10:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:26,891 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2021-11-07 08:10:26,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 states have internal predecessors, (78), 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) [2021-11-07 08:10:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2021-11-07 08:10:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:10:26,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:26,894 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:26,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:27,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:27,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -74396683, now seen corresponding path program 19 times [2021-11-07 08:10:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:27,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769571947] [2021-11-07 08:10:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:27,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 08:10:27,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769571947] [2021-11-07 08:10:27,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769571947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:27,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196421642] [2021-11-07 08:10:27,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:27,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:27,372 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:27,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:10:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:10:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 08:10:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196421642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:27,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:27,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 08:10:27,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14677619] [2021-11-07 08:10:27,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:10:27,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:10:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:10:27,902 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-11-07 08:10:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:27,970 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-11-07 08:10:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:10:27,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) Word has length 74 [2021-11-07 08:10:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:27,972 INFO L225 Difference]: With dead ends: 116 [2021-11-07 08:10:27,972 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:10:27,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:10:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:10:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-07 08:10:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 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) [2021-11-07 08:10:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-11-07 08:10:27,977 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 74 [2021-11-07 08:10:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-11-07 08:10:27,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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) [2021-11-07 08:10:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-11-07 08:10:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:10:27,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:27,979 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:28,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:28,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:28,192 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -17942921, now seen corresponding path program 20 times [2021-11-07 08:10:28,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:28,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727604244] [2021-11-07 08:10:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:28,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 08:10:28,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:28,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727604244] [2021-11-07 08:10:28,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727604244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:28,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796761766] [2021-11-07 08:10:28,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:28,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:28,532 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:28,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:10:28,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:28,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:10:28,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 08:10:29,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796761766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:29,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:29,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 08:10:29,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988891405] [2021-11-07 08:10:29,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:10:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:10:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:10:29,149 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-11-07 08:10:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:29,205 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2021-11-07 08:10:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:10:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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 76 [2021-11-07 08:10:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:29,209 INFO L225 Difference]: With dead ends: 118 [2021-11-07 08:10:29,209 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 08:10:29,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:10:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 08:10:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-07 08:10:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 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) [2021-11-07 08:10:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2021-11-07 08:10:29,211 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 76 [2021-11-07 08:10:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:29,212 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2021-11-07 08:10:29,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 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) [2021-11-07 08:10:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2021-11-07 08:10:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:10:29,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:29,213 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:29,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-07 08:10:29,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-07 08:10:29,440 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:29,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1600452487, now seen corresponding path program 21 times [2021-11-07 08:10:29,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:29,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551452602] [2021-11-07 08:10:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:29,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-07 08:10:29,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:29,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551452602] [2021-11-07 08:10:29,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551452602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:29,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880692804] [2021-11-07 08:10:29,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:29,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:29,724 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:29,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:10:30,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:10:30,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:30,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:10:30,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-07 08:10:30,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880692804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:30,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:30,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2021-11-07 08:10:30,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497430609] [2021-11-07 08:10:30,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:10:30,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:10:30,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:10:30,444 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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) [2021-11-07 08:10:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:30,556 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2021-11-07 08:10:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:10:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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 78 [2021-11-07 08:10:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:30,557 INFO L225 Difference]: With dead ends: 125 [2021-11-07 08:10:30,557 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 08:10:30,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:10:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 08:10:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-11-07 08:10:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 85 states have internal predecessors, (98), 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) [2021-11-07 08:10:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2021-11-07 08:10:30,562 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 78 [2021-11-07 08:10:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:30,562 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2021-11-07 08:10:30,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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) [2021-11-07 08:10:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2021-11-07 08:10:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:10:30,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:30,564 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:30,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:30,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:10:30,764 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash -754057590, now seen corresponding path program 22 times [2021-11-07 08:10:30,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:30,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636561460] [2021-11-07 08:10:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:30,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 08:10:31,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:31,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636561460] [2021-11-07 08:10:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636561460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:31,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534096149] [2021-11-07 08:10:31,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:31,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:31,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:31,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:31,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:10:31,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:10:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 08:10:31,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534096149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:31,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:31,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2021-11-07 08:10:31,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565591503] [2021-11-07 08:10:31,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:10:31,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:10:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:10:31,881 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 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) [2021-11-07 08:10:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:32,000 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2021-11-07 08:10:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:10:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 08:10:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:32,003 INFO L225 Difference]: With dead ends: 133 [2021-11-07 08:10:32,004 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 08:10:32,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:10:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 08:10:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2021-11-07 08:10:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 90 states have internal predecessors, (104), 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) [2021-11-07 08:10:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2021-11-07 08:10:32,008 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 83 [2021-11-07 08:10:32,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:32,009 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2021-11-07 08:10:32,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 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) [2021-11-07 08:10:32,009 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2021-11-07 08:10:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 08:10:32,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:32,010 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:32,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:32,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:10:32,216 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash -77685987, now seen corresponding path program 23 times [2021-11-07 08:10:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:32,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794528451] [2021-11-07 08:10:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:32,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-07 08:10:32,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:32,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794528451] [2021-11-07 08:10:32,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794528451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:32,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10092755] [2021-11-07 08:10:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:32,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:32,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:32,556 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:32,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:10:33,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 08:10:33,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:33,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:10:33,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-11-07 08:10:33,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10092755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:33,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:33,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2021-11-07 08:10:33,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513251601] [2021-11-07 08:10:33,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:10:33,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:10:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:10:33,815 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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) [2021-11-07 08:10:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:33,958 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2021-11-07 08:10:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:10:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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 88 [2021-11-07 08:10:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:33,960 INFO L225 Difference]: With dead ends: 141 [2021-11-07 08:10:33,960 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 08:10:33,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:10:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 08:10:33,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-11-07 08:10:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 95 states have internal predecessors, (110), 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) [2021-11-07 08:10:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2021-11-07 08:10:33,965 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 88 [2021-11-07 08:10:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:33,965 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2021-11-07 08:10:33,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 38 states have internal predecessors, (97), 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) [2021-11-07 08:10:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2021-11-07 08:10:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 08:10:33,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:33,967 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:34,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:34,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:10:34,192 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:34,192 INFO L85 PathProgramCache]: Analyzing trace with hash -182696986, now seen corresponding path program 24 times [2021-11-07 08:10:34,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:34,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341132179] [2021-11-07 08:10:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:34,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:34,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:34,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341132179] [2021-11-07 08:10:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341132179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:34,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492365976] [2021-11-07 08:10:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:34,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:34,568 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:34,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:10:36,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 08:10:36,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:36,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:10:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:36,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492365976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:36,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:36,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 08:10:36,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206066807] [2021-11-07 08:10:36,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:10:36,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:10:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:10:36,373 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:36,440 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2021-11-07 08:10:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:10:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 08:10:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:36,442 INFO L225 Difference]: With dead ends: 144 [2021-11-07 08:10:36,442 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 08:10:36,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:10:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 08:10:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-07 08:10:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 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) [2021-11-07 08:10:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-11-07 08:10:36,446 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 93 [2021-11-07 08:10:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:36,446 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-11-07 08:10:36,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-11-07 08:10:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 08:10:36,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:36,448 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:36,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-07 08:10:36,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:10:36,652 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:36,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1785629148, now seen corresponding path program 25 times [2021-11-07 08:10:36,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:36,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194363472] [2021-11-07 08:10:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:36,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:37,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:37,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194363472] [2021-11-07 08:10:37,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194363472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:37,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627389109] [2021-11-07 08:10:37,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:37,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:37,048 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:10:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:37,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:10:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:37,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627389109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:37,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:37,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-07 08:10:37,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187747714] [2021-11-07 08:10:37,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:10:37,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:10:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:10:37,870 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:37,991 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2021-11-07 08:10:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:10:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-07 08:10:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:37,992 INFO L225 Difference]: With dead ends: 146 [2021-11-07 08:10:37,992 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 08:10:37,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:10:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 08:10:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-11-07 08:10:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 99 states have internal predecessors, (114), 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) [2021-11-07 08:10:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2021-11-07 08:10:37,996 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 95 [2021-11-07 08:10:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2021-11-07 08:10:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2021-11-07 08:10:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 08:10:37,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:37,998 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:38,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:38,198 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash -310177566, now seen corresponding path program 26 times [2021-11-07 08:10:38,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:38,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376440007] [2021-11-07 08:10:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:38,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:38,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:38,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376440007] [2021-11-07 08:10:38,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376440007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:38,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729240504] [2021-11-07 08:10:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:38,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:38,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:38,557 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:38,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:10:38,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:10:38,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:39,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729240504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:39,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:39,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 08:10:39,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393080249] [2021-11-07 08:10:39,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:10:39,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:10:39,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:10:39,246 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-07 08:10:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:39,334 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2021-11-07 08:10:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:10:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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 [2021-11-07 08:10:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:39,335 INFO L225 Difference]: With dead ends: 148 [2021-11-07 08:10:39,335 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 08:10:39,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:10:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 08:10:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-07 08:10:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 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) [2021-11-07 08:10:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2021-11-07 08:10:39,340 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 97 [2021-11-07 08:10:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:39,340 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2021-11-07 08:10:39,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 30 states have internal predecessors, (67), 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) [2021-11-07 08:10:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2021-11-07 08:10:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:10:39,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:39,341 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:39,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:39,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:10:39,556 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash 259585056, now seen corresponding path program 27 times [2021-11-07 08:10:39,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:39,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746882295] [2021-11-07 08:10:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:39,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-07 08:10:39,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:39,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746882295] [2021-11-07 08:10:39,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746882295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:39,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24613492] [2021-11-07 08:10:39,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:39,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:39,936 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:39,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:10:40,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-07 08:10:40,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:10:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-11-07 08:10:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24613492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:40,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:40,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2021-11-07 08:10:40,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344257662] [2021-11-07 08:10:40,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:10:40,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:40,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:10:40,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:10:40,965 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 43 states, 43 states have (on average 2.511627906976744) internal successors, (108), 43 states have internal predecessors, (108), 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) [2021-11-07 08:10:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:41,100 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2021-11-07 08:10:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:10:41,101 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.511627906976744) internal successors, (108), 43 states have internal predecessors, (108), 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 99 [2021-11-07 08:10:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:41,101 INFO L225 Difference]: With dead ends: 155 [2021-11-07 08:10:41,102 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:10:41,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:10:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:10:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-11-07 08:10:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.150943396226415) internal successors, (122), 106 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-11-07 08:10:41,107 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 99 [2021-11-07 08:10:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:41,107 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-11-07 08:10:41,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.511627906976744) internal successors, (108), 43 states have internal predecessors, (108), 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) [2021-11-07 08:10:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-11-07 08:10:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 08:10:41,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:41,109 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:41,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:41,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:10:41,324 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash 877425095, now seen corresponding path program 28 times [2021-11-07 08:10:41,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:41,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267210123] [2021-11-07 08:10:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:41,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-07 08:10:41,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267210123] [2021-11-07 08:10:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267210123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:41,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819843343] [2021-11-07 08:10:41,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:41,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:41,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:41,780 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:41,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:10:42,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:42,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:10:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-07 08:10:42,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819843343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:42,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:42,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 08:10:42,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879844605] [2021-11-07 08:10:42,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:10:42,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:10:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:10:42,571 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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) [2021-11-07 08:10:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:42,640 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-11-07 08:10:42,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:10:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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 104 [2021-11-07 08:10:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:42,645 INFO L225 Difference]: With dead ends: 158 [2021-11-07 08:10:42,645 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:10:42,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:10:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:10:42,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-07 08:10:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1481481481481481) internal successors, (124), 108 states have internal predecessors, (124), 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) [2021-11-07 08:10:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-11-07 08:10:42,650 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 104 [2021-11-07 08:10:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:42,650 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-11-07 08:10:42,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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) [2021-11-07 08:10:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-11-07 08:10:42,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 08:10:42,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:42,652 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:42,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:42,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:42,868 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1207300919, now seen corresponding path program 29 times [2021-11-07 08:10:42,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:42,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714799091] [2021-11-07 08:10:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:42,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-07 08:10:43,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:43,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714799091] [2021-11-07 08:10:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714799091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:43,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149809535] [2021-11-07 08:10:43,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:43,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:43,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:43,444 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:43,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:10:46,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 08:10:46,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:10:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-11-07 08:10:47,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149809535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:47,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:47,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2021-11-07 08:10:47,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195483997] [2021-11-07 08:10:47,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:10:47,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:10:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:10:47,107 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 46 states, 46 states have (on average 2.5) internal successors, (115), 46 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:47,271 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2021-11-07 08:10:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:10:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5) internal successors, (115), 46 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 08:10:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:47,272 INFO L225 Difference]: With dead ends: 165 [2021-11-07 08:10:47,273 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:10:47,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:10:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:10:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-11-07 08:10:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1504424778761062) internal successors, (130), 113 states have internal predecessors, (130), 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) [2021-11-07 08:10:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-11-07 08:10:47,278 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 106 [2021-11-07 08:10:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:47,278 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-11-07 08:10:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5) internal successors, (115), 46 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-11-07 08:10:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 08:10:47,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:47,280 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:47,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:47,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 08:10:47,496 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:47,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1187401926, now seen corresponding path program 30 times [2021-11-07 08:10:47,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:47,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490527657] [2021-11-07 08:10:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:47,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-07 08:10:47,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:47,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490527657] [2021-11-07 08:10:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490527657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:47,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923129661] [2021-11-07 08:10:47,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:47,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:47,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:47,940 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:47,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:10:49,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-11-07 08:10:49,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:10:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-11-07 08:10:50,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923129661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:50,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:50,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2021-11-07 08:10:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158672740] [2021-11-07 08:10:50,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:10:50,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:10:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:50,503 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 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) [2021-11-07 08:10:50,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:50,648 INFO L93 Difference]: Finished difference Result 173 states and 208 transitions. [2021-11-07 08:10:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:10:50,648 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 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 111 [2021-11-07 08:10:50,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:50,649 INFO L225 Difference]: With dead ends: 173 [2021-11-07 08:10:50,649 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 08:10:50,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 08:10:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-11-07 08:10:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.152542372881356) internal successors, (136), 118 states have internal predecessors, (136), 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) [2021-11-07 08:10:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2021-11-07 08:10:50,654 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 111 [2021-11-07 08:10:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:50,655 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2021-11-07 08:10:50,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5) internal successors, (120), 48 states have internal predecessors, (120), 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) [2021-11-07 08:10:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2021-11-07 08:10:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:10:50,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:50,656 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:50,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-07 08:10:50,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:10:50,864 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:50,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:50,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1343124845, now seen corresponding path program 31 times [2021-11-07 08:10:50,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:50,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673055182] [2021-11-07 08:10:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:50,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:10:51,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:51,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673055182] [2021-11-07 08:10:51,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673055182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:51,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118090808] [2021-11-07 08:10:51,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:51,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:51,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:51,408 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:51,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:10:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:52,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 08:10:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:10:52,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118090808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:52,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:52,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-07 08:10:52,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030639967] [2021-11-07 08:10:52,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:10:52,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:10:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:10:52,425 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-07 08:10:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:52,513 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2021-11-07 08:10:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:10:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 116 [2021-11-07 08:10:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:52,514 INFO L225 Difference]: With dead ends: 176 [2021-11-07 08:10:52,515 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 08:10:52,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:10:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 08:10:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-07 08:10:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.15) internal successors, (138), 120 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2021-11-07 08:10:52,531 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 116 [2021-11-07 08:10:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:52,532 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2021-11-07 08:10:52,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2021-11-07 08:10:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2021-11-07 08:10:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 08:10:52,533 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:52,533 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:52,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:10:52,760 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1380031855, now seen corresponding path program 32 times [2021-11-07 08:10:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:52,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634954034] [2021-11-07 08:10:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:52,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:10:53,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:53,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634954034] [2021-11-07 08:10:53,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634954034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:53,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904600384] [2021-11-07 08:10:53,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:53,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:53,332 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:53,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:10:54,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:54,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:10:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:10:54,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904600384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:54,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:54,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 08:10:54,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057497092] [2021-11-07 08:10:54,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:10:54,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:10:54,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:10:54,356 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2021-11-07 08:10:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:54,452 INFO L93 Difference]: Finished difference Result 178 states and 212 transitions. [2021-11-07 08:10:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:10:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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 118 [2021-11-07 08:10:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:54,453 INFO L225 Difference]: With dead ends: 178 [2021-11-07 08:10:54,453 INFO L226 Difference]: Without dead ends: 124 [2021-11-07 08:10:54,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:10:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-07 08:10:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-07 08:10:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 122 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2021-11-07 08:10:54,458 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 118 [2021-11-07 08:10:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:54,458 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2021-11-07 08:10:54,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2021-11-07 08:10:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2021-11-07 08:10:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 08:10:54,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:54,460 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:54,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-07 08:10:54,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:54,676 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1807037199, now seen corresponding path program 33 times [2021-11-07 08:10:54,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:54,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498930799] [2021-11-07 08:10:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:54,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-07 08:10:55,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498930799] [2021-11-07 08:10:55,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498930799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:55,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095316969] [2021-11-07 08:10:55,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:55,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:55,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:55,256 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:55,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:10:56,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 08:10:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:56,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:10:56,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2021-11-07 08:10:56,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095316969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:56,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:56,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2021-11-07 08:10:56,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110275289] [2021-11-07 08:10:56,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:10:56,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:10:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:56,639 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 states have internal predecessors, (129), 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) [2021-11-07 08:10:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:56,803 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2021-11-07 08:10:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:10:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 states have internal predecessors, (129), 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 120 [2021-11-07 08:10:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:56,804 INFO L225 Difference]: With dead ends: 185 [2021-11-07 08:10:56,804 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 08:10:56,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 08:10:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-11-07 08:10:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 127 states have internal predecessors, (146), 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) [2021-11-07 08:10:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2021-11-07 08:10:56,809 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 120 [2021-11-07 08:10:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:56,809 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2021-11-07 08:10:56,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 52 states have internal predecessors, (129), 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) [2021-11-07 08:10:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2021-11-07 08:10:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 08:10:56,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:56,810 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:56,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:57,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 08:10:57,010 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:57,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1399826030, now seen corresponding path program 34 times [2021-11-07 08:10:57,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:57,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71036571] [2021-11-07 08:10:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:57,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:10:57,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:57,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71036571] [2021-11-07 08:10:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71036571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:57,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73576333] [2021-11-07 08:10:57,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:57,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:57,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:57,612 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:57,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:10:58,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:10:58,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 08:10:58,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:10:58,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73576333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:58,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:58,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 08:10:58,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728824461] [2021-11-07 08:10:58,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:10:58,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:10:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:10:58,650 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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) [2021-11-07 08:10:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:58,726 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2021-11-07 08:10:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:10:58,728 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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 125 [2021-11-07 08:10:58,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:58,729 INFO L225 Difference]: With dead ends: 188 [2021-11-07 08:10:58,729 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 08:10:58,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:10:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 08:10:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-11-07 08:10:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1472868217054264) internal successors, (148), 129 states have internal predecessors, (148), 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) [2021-11-07 08:10:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2021-11-07 08:10:58,735 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 125 [2021-11-07 08:10:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2021-11-07 08:10:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 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) [2021-11-07 08:10:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2021-11-07 08:10:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 08:10:58,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:58,738 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:58,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:58,964 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash -704834608, now seen corresponding path program 35 times [2021-11-07 08:10:58,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:58,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579109206] [2021-11-07 08:10:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:58,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:10:59,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:59,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579109206] [2021-11-07 08:10:59,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579109206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:59,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80968942] [2021-11-07 08:10:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:59,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:59,652 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:11:02,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 08:11:02,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 08:11:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:11:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80968942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:02,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 08:11:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844453641] [2021-11-07 08:11:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:11:02,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:11:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:11:02,664 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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) [2021-11-07 08:11:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:02,769 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-11-07 08:11:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:11:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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 127 [2021-11-07 08:11:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:02,771 INFO L225 Difference]: With dead ends: 190 [2021-11-07 08:11:02,772 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 08:11:02,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:11:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 08:11:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-11-07 08:11:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 131 states have internal predecessors, (150), 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) [2021-11-07 08:11:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2021-11-07 08:11:02,777 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 127 [2021-11-07 08:11:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:02,778 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2021-11-07 08:11:02,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 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) [2021-11-07 08:11:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2021-11-07 08:11:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 08:11:02,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:02,779 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:02,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 08:11:02,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:11:02,997 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1461991054, now seen corresponding path program 36 times [2021-11-07 08:11:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:02,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476895566] [2021-11-07 08:11:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-07 08:11:03,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:03,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476895566] [2021-11-07 08:11:03,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476895566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:03,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870810174] [2021-11-07 08:11:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:11:03,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:03,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:03,662 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:03,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:11:12,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2021-11-07 08:11:12,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:12,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:11:12,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1672 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-07 08:11:13,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870810174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:13,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:13,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2021-11-07 08:11:13,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50620831] [2021-11-07 08:11:13,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 08:11:13,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 08:11:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:11:13,467 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:13,627 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2021-11-07 08:11:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 08:11:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-07 08:11:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:13,632 INFO L225 Difference]: With dead ends: 197 [2021-11-07 08:11:13,633 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 08:11:13,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=911, Invalid=2169, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:11:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 08:11:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2021-11-07 08:11:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 136 states have internal predecessors, (156), 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) [2021-11-07 08:11:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2021-11-07 08:11:13,645 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 129 [2021-11-07 08:11:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:13,645 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2021-11-07 08:11:13,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2021-11-07 08:11:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 08:11:13,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:13,647 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:13,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:13,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:11:13,868 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:13,868 INFO L85 PathProgramCache]: Analyzing trace with hash 975069465, now seen corresponding path program 37 times [2021-11-07 08:11:13,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:13,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055159603] [2021-11-07 08:11:13,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:13,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 08:11:14,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:14,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055159603] [2021-11-07 08:11:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055159603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:14,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366517321] [2021-11-07 08:11:14,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:11:14,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:14,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:14,494 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:14,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:11:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:11:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 08:11:15,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366517321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:15,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:15,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-07 08:11:15,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282982780] [2021-11-07 08:11:15,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 08:11:15,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:15,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 08:11:15,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:11:15,589 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 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) [2021-11-07 08:11:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:15,684 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-11-07 08:11:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:11:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 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 134 [2021-11-07 08:11:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:15,685 INFO L225 Difference]: With dead ends: 200 [2021-11-07 08:11:15,685 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 08:11:15,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:11:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 08:11:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-11-07 08:11:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.144927536231884) internal successors, (158), 138 states have internal predecessors, (158), 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) [2021-11-07 08:11:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 158 transitions. [2021-11-07 08:11:15,689 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 158 transitions. Word has length 134 [2021-11-07 08:11:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:15,690 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 158 transitions. [2021-11-07 08:11:15,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 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) [2021-11-07 08:11:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 158 transitions. [2021-11-07 08:11:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 08:11:15,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:15,691 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:15,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:11:15,912 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1881951387, now seen corresponding path program 38 times [2021-11-07 08:11:15,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:15,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473612823] [2021-11-07 08:11:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:15,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 08:11:16,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:16,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473612823] [2021-11-07 08:11:16,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473612823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:16,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754581730] [2021-11-07 08:11:16,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:11:16,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:16,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:16,574 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:16,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:11:17,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:11:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:17,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:11:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1869 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 08:11:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754581730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:17,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:17,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 08:11:17,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970129669] [2021-11-07 08:11:17,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 08:11:17,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 08:11:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:11:17,759 INFO L87 Difference]: Start difference. First operand 139 states and 158 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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) [2021-11-07 08:11:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:17,843 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2021-11-07 08:11:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 08:11:17,851 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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 136 [2021-11-07 08:11:17,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:17,852 INFO L225 Difference]: With dead ends: 202 [2021-11-07 08:11:17,852 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 08:11:17,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:11:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 08:11:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-11-07 08:11:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 140 states have internal predecessors, (160), 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) [2021-11-07 08:11:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-11-07 08:11:17,857 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 136 [2021-11-07 08:11:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:17,858 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-11-07 08:11:17,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 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) [2021-11-07 08:11:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-11-07 08:11:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 08:11:17,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:17,859 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:17,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-07 08:11:18,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:11:18,084 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1517117341, now seen corresponding path program 39 times [2021-11-07 08:11:18,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:18,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215471727] [2021-11-07 08:11:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:18,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-07 08:11:18,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:18,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215471727] [2021-11-07 08:11:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215471727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:18,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5016618] [2021-11-07 08:11:18,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:11:18,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:18,854 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:18,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:11:19,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-07 08:11:19,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:11:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2021-11-07 08:11:20,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5016618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:20,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:20,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2021-11-07 08:11:20,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695876537] [2021-11-07 08:11:20,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 08:11:20,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:20,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 08:11:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:11:20,572 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 60 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 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) [2021-11-07 08:11:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:20,760 INFO L93 Difference]: Finished difference Result 209 states and 250 transitions. [2021-11-07 08:11:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:11:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 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 138 [2021-11-07 08:11:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:20,762 INFO L225 Difference]: With dead ends: 209 [2021-11-07 08:11:20,762 INFO L226 Difference]: Without dead ends: 149 [2021-11-07 08:11:20,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1050, Invalid=2490, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:11:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-07 08:11:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-11-07 08:11:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 145 states have internal predecessors, (166), 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) [2021-11-07 08:11:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 166 transitions. [2021-11-07 08:11:20,770 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 166 transitions. Word has length 138 [2021-11-07 08:11:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:20,770 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 166 transitions. [2021-11-07 08:11:20,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.45) internal successors, (147), 60 states have internal predecessors, (147), 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) [2021-11-07 08:11:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 166 transitions. [2021-11-07 08:11:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 08:11:20,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:20,772 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:20,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:20,992 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -159054874, now seen corresponding path program 40 times [2021-11-07 08:11:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:20,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850876995] [2021-11-07 08:11:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:20,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-07 08:11:21,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:21,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850876995] [2021-11-07 08:11:21,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850876995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:21,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269013652] [2021-11-07 08:11:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:11:21,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:21,857 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:21,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:11:22,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:11:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:11:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2021-11-07 08:11:23,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269013652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:23,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:23,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 21] total 62 [2021-11-07 08:11:23,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235930302] [2021-11-07 08:11:23,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 08:11:23,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:23,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 08:11:23,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:11:23,642 INFO L87 Difference]: Start difference. First operand 146 states and 166 transitions. Second operand has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 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) [2021-11-07 08:11:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:23,857 INFO L93 Difference]: Finished difference Result 217 states and 260 transitions. [2021-11-07 08:11:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:11:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 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 143 [2021-11-07 08:11:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:23,858 INFO L225 Difference]: With dead ends: 217 [2021-11-07 08:11:23,859 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 08:11:23,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1112, Invalid=2670, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:11:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 08:11:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2021-11-07 08:11:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1466666666666667) internal successors, (172), 150 states have internal predecessors, (172), 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) [2021-11-07 08:11:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2021-11-07 08:11:23,863 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 143 [2021-11-07 08:11:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:23,864 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2021-11-07 08:11:23,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.4516129032258065) internal successors, (152), 62 states have internal predecessors, (152), 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) [2021-11-07 08:11:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2021-11-07 08:11:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 08:11:23,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:23,870 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:23,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 08:11:24,071 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1007793855, now seen corresponding path program 41 times [2021-11-07 08:11:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:24,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364416497] [2021-11-07 08:11:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-07 08:11:24,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364416497] [2021-11-07 08:11:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364416497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:24,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576825506] [2021-11-07 08:11:24,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:11:24,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:24,952 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:24,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:11:51,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-07 08:11:51,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:51,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:11:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2213 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-07 08:11:52,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576825506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:52,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:52,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 08:11:52,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894297145] [2021-11-07 08:11:52,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 08:11:52,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 08:11:52,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:11:52,130 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 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) [2021-11-07 08:11:52,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:52,223 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-11-07 08:11:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:11:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 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 148 [2021-11-07 08:11:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:52,224 INFO L225 Difference]: With dead ends: 220 [2021-11-07 08:11:52,224 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 08:11:52,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 08:11:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 08:11:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-07 08:11:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.144736842105263) internal successors, (174), 152 states have internal predecessors, (174), 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) [2021-11-07 08:11:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2021-11-07 08:11:52,230 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 148 [2021-11-07 08:11:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:52,230 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2021-11-07 08:11:52,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 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) [2021-11-07 08:11:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2021-11-07 08:11:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 08:11:52,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:52,232 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:52,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 08:11:52,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:52,432 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash -349116093, now seen corresponding path program 42 times [2021-11-07 08:11:52,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:52,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944342015] [2021-11-07 08:11:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:52,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-07 08:11:53,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:53,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944342015] [2021-11-07 08:11:53,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944342015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:53,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974886553] [2021-11-07 08:11:53,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:11:53,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:53,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:53,178 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:12:10,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-11-07 08:12:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:10,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:12:10,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2021-11-07 08:12:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974886553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:11,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:11,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22] total 65 [2021-11-07 08:12:11,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142474345] [2021-11-07 08:12:11,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 08:12:11,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:11,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 08:12:11,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:12:11,327 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 65 states, 65 states have (on average 2.4461538461538463) internal successors, (159), 65 states have internal predecessors, (159), 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) [2021-11-07 08:12:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:11,493 INFO L93 Difference]: Finished difference Result 227 states and 272 transitions. [2021-11-07 08:12:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:12:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4461538461538463) internal successors, (159), 65 states have internal predecessors, (159), 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 150 [2021-11-07 08:12:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:11,495 INFO L225 Difference]: With dead ends: 227 [2021-11-07 08:12:11,495 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 08:12:11,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 08:12:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 08:12:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2021-11-07 08:12:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1464968152866242) internal successors, (180), 157 states have internal predecessors, (180), 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) [2021-11-07 08:12:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2021-11-07 08:12:11,502 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 150 [2021-11-07 08:12:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:11,502 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2021-11-07 08:12:11,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4461538461538463) internal successors, (159), 65 states have internal predecessors, (159), 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) [2021-11-07 08:12:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2021-11-07 08:12:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 08:12:11,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:11,504 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:11,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:11,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:11,720 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1604131968, now seen corresponding path program 43 times [2021-11-07 08:12:11,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:11,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650131314] [2021-11-07 08:12:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:11,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-07 08:12:12,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:12,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650131314] [2021-11-07 08:12:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650131314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:12,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090019930] [2021-11-07 08:12:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:12:12,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:12,550 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:12,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:12:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:12:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2439 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-07 08:12:13,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090019930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:13,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:13,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-07 08:12:13,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556703686] [2021-11-07 08:12:13,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 08:12:13,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:13,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 08:12:13,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:12:13,976 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:14,065 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2021-11-07 08:12:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:12:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-07 08:12:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:14,068 INFO L225 Difference]: With dead ends: 230 [2021-11-07 08:12:14,069 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 08:12:14,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:12:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 08:12:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-11-07 08:12:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1446540880503144) internal successors, (182), 159 states have internal predecessors, (182), 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) [2021-11-07 08:12:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 182 transitions. [2021-11-07 08:12:14,075 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 182 transitions. Word has length 155 [2021-11-07 08:12:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:14,075 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 182 transitions. [2021-11-07 08:12:14,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:12:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 182 transitions. [2021-11-07 08:12:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 08:12:14,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:14,077 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:14,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:12:14,296 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1230070466, now seen corresponding path program 44 times [2021-11-07 08:12:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:14,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287218961] [2021-11-07 08:12:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:14,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-07 08:12:15,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:15,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287218961] [2021-11-07 08:12:15,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287218961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:15,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595171986] [2021-11-07 08:12:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:12:15,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:15,282 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:15,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:12:16,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:12:16,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:12:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-07 08:12:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595171986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:16,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:16,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 08:12:16,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473723926] [2021-11-07 08:12:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:12:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:12:16,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:12:16,721 INFO L87 Difference]: Start difference. First operand 160 states and 182 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) [2021-11-07 08:12:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:16,809 INFO L93 Difference]: Finished difference Result 232 states and 276 transitions. [2021-11-07 08:12:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:12:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) Word has length 157 [2021-11-07 08:12:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:16,811 INFO L225 Difference]: With dead ends: 232 [2021-11-07 08:12:16,811 INFO L226 Difference]: Without dead ends: 163 [2021-11-07 08:12:16,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:12:16,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-07 08:12:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-11-07 08:12:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 161 states have internal predecessors, (184), 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) [2021-11-07 08:12:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 184 transitions. [2021-11-07 08:12:16,816 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 184 transitions. Word has length 157 [2021-11-07 08:12:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 184 transitions. [2021-11-07 08:12:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 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) [2021-11-07 08:12:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 184 transitions. [2021-11-07 08:12:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 08:12:16,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:16,818 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:16,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 08:12:17,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 08:12:17,019 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1760747388, now seen corresponding path program 45 times [2021-11-07 08:12:17,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:17,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135377941] [2021-11-07 08:12:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:17,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-07 08:12:18,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:18,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135377941] [2021-11-07 08:12:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135377941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:18,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610513249] [2021-11-07 08:12:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:12:18,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:18,012 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:12:19,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-07 08:12:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:19,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:12:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2615 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-07 08:12:20,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610513249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:20,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:20,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 23] total 69 [2021-11-07 08:12:20,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375634758] [2021-11-07 08:12:20,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 08:12:20,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 08:12:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:12:20,256 INFO L87 Difference]: Start difference. First operand 162 states and 184 transitions. Second operand has 69 states, 69 states have (on average 2.4347826086956523) internal successors, (168), 69 states have internal predecessors, (168), 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) [2021-11-07 08:12:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:20,434 INFO L93 Difference]: Finished difference Result 239 states and 286 transitions. [2021-11-07 08:12:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 08:12:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.4347826086956523) internal successors, (168), 69 states have internal predecessors, (168), 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 159 [2021-11-07 08:12:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:20,435 INFO L225 Difference]: With dead ends: 239 [2021-11-07 08:12:20,435 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 08:12:20,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1380, Invalid=3312, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:12:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 08:12:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2021-11-07 08:12:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.144578313253012) internal successors, (190), 166 states have internal predecessors, (190), 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) [2021-11-07 08:12:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 190 transitions. [2021-11-07 08:12:20,442 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 190 transitions. Word has length 159 [2021-11-07 08:12:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:20,442 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 190 transitions. [2021-11-07 08:12:20,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.4347826086956523) internal successors, (168), 69 states have internal predecessors, (168), 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) [2021-11-07 08:12:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 190 transitions. [2021-11-07 08:12:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:12:20,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:20,444 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:20,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 08:12:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:12:20,672 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 872774123, now seen corresponding path program 46 times [2021-11-07 08:12:20,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:20,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125069093] [2021-11-07 08:12:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:20,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-07 08:12:21,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:21,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125069093] [2021-11-07 08:12:21,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125069093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:21,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449997700] [2021-11-07 08:12:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:12:21,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:21,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:21,776 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:21,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 08:12:22,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:12:22,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:22,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:12:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2021-11-07 08:12:23,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449997700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:23,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:23,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 24] total 71 [2021-11-07 08:12:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738527160] [2021-11-07 08:12:23,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 08:12:23,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 08:12:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:12:23,845 INFO L87 Difference]: Start difference. First operand 167 states and 190 transitions. Second operand has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 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) [2021-11-07 08:12:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:24,014 INFO L93 Difference]: Finished difference Result 247 states and 296 transitions. [2021-11-07 08:12:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 08:12:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 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 164 [2021-11-07 08:12:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:24,015 INFO L225 Difference]: With dead ends: 247 [2021-11-07 08:12:24,015 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 08:12:24,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1451, Invalid=3519, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 08:12:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 08:12:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2021-11-07 08:12:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 171 states have internal predecessors, (196), 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) [2021-11-07 08:12:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2021-11-07 08:12:24,022 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 164 [2021-11-07 08:12:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:24,022 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2021-11-07 08:12:24,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 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) [2021-11-07 08:12:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2021-11-07 08:12:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-07 08:12:24,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:24,024 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:24,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-07 08:12:24,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:12:24,252 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1899844264, now seen corresponding path program 47 times [2021-11-07 08:12:24,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:24,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861312173] [2021-11-07 08:12:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:24,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-07 08:12:25,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:25,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861312173] [2021-11-07 08:12:25,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861312173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:25,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044730578] [2021-11-07 08:12:25,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:12:25,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:25,243 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:25,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 08:12:50,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-11-07 08:12:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:12:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:12:50,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:12:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2924 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2021-11-07 08:12:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044730578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:51,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:12:51,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25] total 73 [2021-11-07 08:12:51,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419568736] [2021-11-07 08:12:51,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 08:12:51,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:12:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 08:12:51,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:12:51,190 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 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) [2021-11-07 08:12:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:12:51,394 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2021-11-07 08:12:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 08:12:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 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 169 [2021-11-07 08:12:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:12:51,396 INFO L225 Difference]: With dead ends: 255 [2021-11-07 08:12:51,396 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 08:12:51,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1524, Invalid=3732, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:12:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 08:12:51,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2021-11-07 08:12:51,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1477272727272727) internal successors, (202), 176 states have internal predecessors, (202), 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) [2021-11-07 08:12:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2021-11-07 08:12:51,402 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 169 [2021-11-07 08:12:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:12:51,403 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2021-11-07 08:12:51,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.4383561643835616) internal successors, (178), 73 states have internal predecessors, (178), 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) [2021-11-07 08:12:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2021-11-07 08:12:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 08:12:51,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:12:51,405 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:12:51,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-07 08:12:51,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:51,608 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:12:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:12:51,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2102154255, now seen corresponding path program 48 times [2021-11-07 08:12:51,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:12:51,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301548186] [2021-11-07 08:12:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:12:51,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:12:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:12:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-11-07 08:12:52,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:12:52,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301548186] [2021-11-07 08:12:52,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301548186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:12:52,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346434650] [2021-11-07 08:12:52,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:12:52,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:12:52,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:12:52,600 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:12:52,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 08:13:52,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-11-07 08:13:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:13:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3086 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2304 trivial. 0 not checked. [2021-11-07 08:13:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346434650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:53,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 26] total 75 [2021-11-07 08:13:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165141451] [2021-11-07 08:13:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 08:13:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 08:13:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=3951, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:13:53,968 INFO L87 Difference]: Start difference. First operand 177 states and 202 transitions. Second operand has 75 states, 75 states have (on average 2.44) internal successors, (183), 75 states have internal predecessors, (183), 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) [2021-11-07 08:13:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:54,153 INFO L93 Difference]: Finished difference Result 263 states and 316 transitions. [2021-11-07 08:13:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 08:13:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.44) internal successors, (183), 75 states have internal predecessors, (183), 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 174 [2021-11-07 08:13:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:54,155 INFO L225 Difference]: With dead ends: 263 [2021-11-07 08:13:54,155 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 08:13:54,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1599, Invalid=3951, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 08:13:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 08:13:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2021-11-07 08:13:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.149171270718232) internal successors, (208), 181 states have internal predecessors, (208), 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) [2021-11-07 08:13:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2021-11-07 08:13:54,159 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 174 [2021-11-07 08:13:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:54,160 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2021-11-07 08:13:54,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.44) internal successors, (183), 75 states have internal predecessors, (183), 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) [2021-11-07 08:13:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2021-11-07 08:13:54,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 08:13:54,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:54,161 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:54,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-07 08:13:54,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:13:54,368 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1933337804, now seen corresponding path program 49 times [2021-11-07 08:13:54,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:54,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954376166] [2021-11-07 08:13:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:54,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-07 08:13:55,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:55,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954376166] [2021-11-07 08:13:55,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954376166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:55,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123580628] [2021-11-07 08:13:55,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:13:55,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:55,609 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:55,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 08:13:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 08:13:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3253 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-07 08:13:57,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123580628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:57,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:57,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-07 08:13:57,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559575805] [2021-11-07 08:13:57,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 08:13:57,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 08:13:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:13:57,566 INFO L87 Difference]: Start difference. First operand 182 states and 208 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 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) [2021-11-07 08:13:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:57,688 INFO L93 Difference]: Finished difference Result 266 states and 318 transitions. [2021-11-07 08:13:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:13:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 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 179 [2021-11-07 08:13:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:57,690 INFO L225 Difference]: With dead ends: 266 [2021-11-07 08:13:57,690 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 08:13:57,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 08:13:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 08:13:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-11-07 08:13:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.1475409836065573) internal successors, (210), 183 states have internal predecessors, (210), 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) [2021-11-07 08:13:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 210 transitions. [2021-11-07 08:13:57,695 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 210 transitions. Word has length 179 [2021-11-07 08:13:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:57,696 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 210 transitions. [2021-11-07 08:13:57,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 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) [2021-11-07 08:13:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 210 transitions. [2021-11-07 08:13:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-07 08:13:57,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:57,697 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:57,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 08:13:57,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-07 08:13:57,904 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:57,904 INFO L85 PathProgramCache]: Analyzing trace with hash 898464498, now seen corresponding path program 50 times [2021-11-07 08:13:57,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:57,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549368755] [2021-11-07 08:13:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:57,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-07 08:13:58,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:58,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549368755] [2021-11-07 08:13:58,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549368755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:58,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503502281] [2021-11-07 08:13:58,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:58,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:58,928 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:58,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 08:14:00,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:00,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 08:14:00,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3352 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-07 08:14:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503502281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:00,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:00,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-07 08:14:00,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638502956] [2021-11-07 08:14:00,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 08:14:00,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 08:14:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:14:00,956 INFO L87 Difference]: Start difference. First operand 184 states and 210 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:01,070 INFO L93 Difference]: Finished difference Result 268 states and 320 transitions. [2021-11-07 08:14:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 08:14:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-11-07 08:14:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:01,072 INFO L225 Difference]: With dead ends: 268 [2021-11-07 08:14:01,072 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 08:14:01,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:14:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 08:14:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-11-07 08:14:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.145945945945946) internal successors, (212), 185 states have internal predecessors, (212), 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) [2021-11-07 08:14:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2021-11-07 08:14:01,078 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 181 [2021-11-07 08:14:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:01,079 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2021-11-07 08:14:01,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2021-11-07 08:14:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 08:14:01,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:01,081 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:01,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:01,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:01,296 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -748788944, now seen corresponding path program 51 times [2021-11-07 08:14:01,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:01,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364382108] [2021-11-07 08:14:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:01,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3453 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-07 08:14:02,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:02,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364382108] [2021-11-07 08:14:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364382108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:02,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114100757] [2021-11-07 08:14:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:02,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:02,399 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 08:14:04,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-07 08:14:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:14:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3453 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2601 trivial. 0 not checked. [2021-11-07 08:14:06,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114100757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:06,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:06,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27] total 79 [2021-11-07 08:14:06,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915071170] [2021-11-07 08:14:06,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 08:14:06,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 08:14:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1781, Invalid=4381, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:14:06,053 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 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) [2021-11-07 08:14:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:06,270 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2021-11-07 08:14:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 08:14:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 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 183 [2021-11-07 08:14:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:06,272 INFO L225 Difference]: With dead ends: 275 [2021-11-07 08:14:06,273 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 08:14:06,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1781, Invalid=4381, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 08:14:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 08:14:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-11-07 08:14:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 190 states have internal predecessors, (218), 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) [2021-11-07 08:14:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2021-11-07 08:14:06,280 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 183 [2021-11-07 08:14:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:06,281 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2021-11-07 08:14:06,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.430379746835443) internal successors, (192), 79 states have internal predecessors, (192), 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) [2021-11-07 08:14:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2021-11-07 08:14:06,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 08:14:06,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:06,283 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:06,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 08:14:06,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:06,488 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 436470711, now seen corresponding path program 52 times [2021-11-07 08:14:06,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:06,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186540829] [2021-11-07 08:14:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:06,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-07 08:14:07,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186540829] [2021-11-07 08:14:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186540829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829404303] [2021-11-07 08:14:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:07,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:07,774 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:07,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 08:14:09,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:09,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:09,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:14:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-07 08:14:09,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829404303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:09,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:09,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-07 08:14:09,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301094120] [2021-11-07 08:14:09,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 08:14:09,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 08:14:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:14:09,954 INFO L87 Difference]: Start difference. First operand 191 states and 218 transitions. Second operand has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 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) [2021-11-07 08:14:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:10,073 INFO L93 Difference]: Finished difference Result 278 states and 332 transitions. [2021-11-07 08:14:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 08:14:10,073 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 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 188 [2021-11-07 08:14:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:10,074 INFO L225 Difference]: With dead ends: 278 [2021-11-07 08:14:10,074 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 08:14:10,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:14:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 08:14:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-11-07 08:14:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.1458333333333333) internal successors, (220), 192 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) [2021-11-07 08:14:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2021-11-07 08:14:10,081 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 188 [2021-11-07 08:14:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:10,081 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2021-11-07 08:14:10,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 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) [2021-11-07 08:14:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2021-11-07 08:14:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 08:14:10,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:10,083 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:10,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-07 08:14:10,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-07 08:14:10,300 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1956185671, now seen corresponding path program 53 times [2021-11-07 08:14:10,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:10,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344912932] [2021-11-07 08:14:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:10,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-07 08:14:11,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344912932] [2021-11-07 08:14:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344912932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381664721] [2021-11-07 08:14:11,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:11,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:11,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:11,738 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:11,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 08:15:26,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-11-07 08:15:26,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:15:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2021-11-07 08:15:27,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381664721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:27,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 28] total 82 [2021-11-07 08:15:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954925203] [2021-11-07 08:15:27,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 08:15:27,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 08:15:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1917, Invalid=4725, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:15:27,313 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 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) [2021-11-07 08:15:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:27,592 INFO L93 Difference]: Finished difference Result 285 states and 342 transitions. [2021-11-07 08:15:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 08:15:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 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 190 [2021-11-07 08:15:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:27,594 INFO L225 Difference]: With dead ends: 285 [2021-11-07 08:15:27,594 INFO L226 Difference]: Without dead ends: 201 [2021-11-07 08:15:27,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1917, Invalid=4725, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:15:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-07 08:15:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2021-11-07 08:15:27,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1472081218274113) internal successors, (226), 197 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 226 transitions. [2021-11-07 08:15:27,602 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 226 transitions. Word has length 190 [2021-11-07 08:15:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:27,603 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 226 transitions. [2021-11-07 08:15:27,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.426829268292683) internal successors, (199), 82 states have internal predecessors, (199), 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) [2021-11-07 08:15:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 226 transitions. [2021-11-07 08:15:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 08:15:27,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:27,605 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:27,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-07 08:15:27,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 08:15:27,812 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1586356554, now seen corresponding path program 54 times [2021-11-07 08:15:27,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:27,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950813941] [2021-11-07 08:15:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:27,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-11-07 08:15:29,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:29,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950813941] [2021-11-07 08:15:29,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950813941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:29,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955300997] [2021-11-07 08:15:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:15:29,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:29,097 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:29,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 08:16:26,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2021-11-07 08:16:26,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:16:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 107 proven. 1001 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2021-11-07 08:16:28,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955300997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:28,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:28,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 31] total 86 [2021-11-07 08:16:28,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771323934] [2021-11-07 08:16:28,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 08:16:28,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 08:16:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2116, Invalid=5194, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 08:16:28,053 INFO L87 Difference]: Start difference. First operand 198 states and 226 transitions. Second operand has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 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) [2021-11-07 08:16:29,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:29,820 INFO L93 Difference]: Finished difference Result 294 states and 354 transitions. [2021-11-07 08:16:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 08:16:29,821 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 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 195 [2021-11-07 08:16:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:29,822 INFO L225 Difference]: With dead ends: 294 [2021-11-07 08:16:29,822 INFO L226 Difference]: Without dead ends: 207 [2021-11-07 08:16:29,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=9730, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 08:16:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-07 08:16:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-11-07 08:16:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1470588235294117) internal successors, (234), 204 states have internal predecessors, (234), 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) [2021-11-07 08:16:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 234 transitions. [2021-11-07 08:16:29,829 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 234 transitions. Word has length 195 [2021-11-07 08:16:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:29,829 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 234 transitions. [2021-11-07 08:16:29,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.395348837209302) internal successors, (206), 86 states have internal predecessors, (206), 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) [2021-11-07 08:16:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 234 transitions. [2021-11-07 08:16:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-07 08:16:29,831 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:29,831 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:29,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:30,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:30,032 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 865331039, now seen corresponding path program 55 times [2021-11-07 08:16:30,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210940588] [2021-11-07 08:16:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:30,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4216 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-07 08:16:31,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:31,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210940588] [2021-11-07 08:16:31,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210940588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:31,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423291025] [2021-11-07 08:16:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:16:31,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:31,750 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 08:16:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:33,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 08:16:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4216 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-07 08:16:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423291025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:34,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:34,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-07 08:16:34,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244767394] [2021-11-07 08:16:34,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 08:16:34,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 08:16:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:16:34,318 INFO L87 Difference]: Start difference. First operand 205 states and 234 transitions. Second operand has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 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) [2021-11-07 08:16:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:34,509 INFO L93 Difference]: Finished difference Result 298 states and 356 transitions. [2021-11-07 08:16:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 08:16:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 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 202 [2021-11-07 08:16:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:34,511 INFO L225 Difference]: With dead ends: 298 [2021-11-07 08:16:34,511 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 08:16:34,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:16:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 08:16:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-07 08:16:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.145631067961165) internal successors, (236), 206 states have internal predecessors, (236), 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) [2021-11-07 08:16:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2021-11-07 08:16:34,518 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 202 [2021-11-07 08:16:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:34,518 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2021-11-07 08:16:34,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1166666666666667) internal successors, (127), 60 states have internal predecessors, (127), 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) [2021-11-07 08:16:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2021-11-07 08:16:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-07 08:16:34,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:34,521 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:34,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-11-07 08:16:34,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 08:16:34,735 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash 491205089, now seen corresponding path program 56 times [2021-11-07 08:16:34,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:34,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103320431] [2021-11-07 08:16:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:34,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-07 08:16:36,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:36,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103320431] [2021-11-07 08:16:36,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103320431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:36,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294796286] [2021-11-07 08:16:36,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:16:36,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:36,382 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:36,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 08:16:38,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:16:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:38,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 08:16:38,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-07 08:16:38,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294796286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:38,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:38,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-07 08:16:38,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100138562] [2021-11-07 08:16:38,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 08:16:38,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:39,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 08:16:39,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:16:39,000 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 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) [2021-11-07 08:16:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:39,156 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2021-11-07 08:16:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:16:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 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 204 [2021-11-07 08:16:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:39,158 INFO L225 Difference]: With dead ends: 300 [2021-11-07 08:16:39,158 INFO L226 Difference]: Without dead ends: 210 [2021-11-07 08:16:39,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 08:16:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-07 08:16:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-07 08:16:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.1442307692307692) internal successors, (238), 208 states have internal predecessors, (238), 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) [2021-11-07 08:16:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2021-11-07 08:16:39,168 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 204 [2021-11-07 08:16:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2021-11-07 08:16:39,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 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) [2021-11-07 08:16:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2021-11-07 08:16:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-07 08:16:39,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:39,171 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:39,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:39,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:39,392 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1733420003, now seen corresponding path program 57 times [2021-11-07 08:16:39,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:39,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428179169] [2021-11-07 08:16:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4444 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-11-07 08:16:40,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:40,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428179169] [2021-11-07 08:16:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428179169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:40,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302374567] [2021-11-07 08:16:40,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:16:40,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:40,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:40,941 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:40,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 08:16:46,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 08:16:46,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 08:16:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4444 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2021-11-07 08:16:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302374567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:47,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:47,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 30] total 89 [2021-11-07 08:16:47,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527382199] [2021-11-07 08:16:47,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 08:16:47,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 08:16:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2264, Invalid=5568, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 08:16:47,708 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand has 89 states, 89 states have (on average 2.4157303370786516) internal successors, (215), 89 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:48,080 INFO L93 Difference]: Finished difference Result 307 states and 368 transitions. [2021-11-07 08:16:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 08:16:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.4157303370786516) internal successors, (215), 89 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2021-11-07 08:16:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:48,083 INFO L225 Difference]: With dead ends: 307 [2021-11-07 08:16:48,083 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 08:16:48,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2264, Invalid=5568, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 08:16:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 08:16:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-11-07 08:16:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1455399061032865) internal successors, (244), 213 states have internal predecessors, (244), 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) [2021-11-07 08:16:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2021-11-07 08:16:48,092 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 206 [2021-11-07 08:16:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:48,092 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2021-11-07 08:16:48,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.4157303370786516) internal successors, (215), 89 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2021-11-07 08:16:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-07 08:16:48,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:48,095 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:48,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:48,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 08:16:48,310 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1281125664, now seen corresponding path program 58 times [2021-11-07 08:16:48,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:48,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630291893] [2021-11-07 08:16:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:48,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4643 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-07 08:16:49,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:49,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630291893] [2021-11-07 08:16:49,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630291893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:49,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249661818] [2021-11-07 08:16:49,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:16:49,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:49,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:49,869 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:49,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 08:16:51,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:16:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:51,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 08:16:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4643 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-07 08:16:52,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249661818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:52,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:52,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-07 08:16:52,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25844208] [2021-11-07 08:16:52,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 08:16:52,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:52,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 08:16:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:16:52,331 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2021-11-07 08:16:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:52,525 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2021-11-07 08:16:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:16:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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 211 [2021-11-07 08:16:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:52,527 INFO L225 Difference]: With dead ends: 310 [2021-11-07 08:16:52,528 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 08:16:52,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:16:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 08:16:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2021-11-07 08:16:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 215 states have internal predecessors, (246), 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) [2021-11-07 08:16:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 246 transitions. [2021-11-07 08:16:52,535 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 246 transitions. Word has length 211 [2021-11-07 08:16:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 246 transitions. [2021-11-07 08:16:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 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) [2021-11-07 08:16:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 246 transitions. [2021-11-07 08:16:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 08:16:52,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:52,537 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:52,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-07 08:16:52,760 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1263467166, now seen corresponding path program 59 times [2021-11-07 08:16:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:52,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008119784] [2021-11-07 08:16:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:52,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-07 08:16:54,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:54,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008119784] [2021-11-07 08:16:54,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008119784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901548414] [2021-11-07 08:16:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:16:54,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:54,434 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:54,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 08:19:20,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-11-07 08:19:20,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:19:20,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 08:19:20,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:19:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-07 08:19:20,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901548414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:19:20,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:19:20,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-07 08:19:20,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187407941] [2021-11-07 08:19:20,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 08:19:20,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:19:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 08:19:20,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:19:20,791 INFO L87 Difference]: Start difference. First operand 216 states and 246 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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) [2021-11-07 08:19:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:19:20,980 INFO L93 Difference]: Finished difference Result 312 states and 372 transitions. [2021-11-07 08:19:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 08:19:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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 213 [2021-11-07 08:19:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:19:20,982 INFO L225 Difference]: With dead ends: 312 [2021-11-07 08:19:20,982 INFO L226 Difference]: Without dead ends: 219 [2021-11-07 08:19:20,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:19:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-07 08:19:20,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2021-11-07 08:19:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.1428571428571428) internal successors, (248), 217 states have internal predecessors, (248), 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) [2021-11-07 08:19:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 248 transitions. [2021-11-07 08:19:20,990 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 248 transitions. Word has length 213 [2021-11-07 08:19:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:19:20,990 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 248 transitions. [2021-11-07 08:19:20,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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) [2021-11-07 08:19:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 248 transitions. [2021-11-07 08:19:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-07 08:19:20,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:19:20,992 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:19:21,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 08:19:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:19:21,208 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:19:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:19:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1514181924, now seen corresponding path program 60 times [2021-11-07 08:19:21,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:19:21,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920494363] [2021-11-07 08:19:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:19:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:19:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:19:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4883 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2021-11-07 08:19:22,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:19:22,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920494363] [2021-11-07 08:19:22,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920494363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:19:22,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585480292] [2021-11-07 08:19:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:19:22,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:19:22,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:19:22,691 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:19:22,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 08:21:11,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2021-11-07 08:21:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:21:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4883 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 3721 trivial. 0 not checked. [2021-11-07 08:21:12,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585480292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:12,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:12,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 31] total 93 [2021-11-07 08:21:12,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485397301] [2021-11-07 08:21:12,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 08:21:12,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 08:21:12,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2480, Invalid=6076, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:21:12,765 INFO L87 Difference]: Start difference. First operand 218 states and 248 transitions. Second operand has 93 states, 93 states have (on average 2.4086021505376345) internal successors, (224), 93 states have internal predecessors, (224), 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) [2021-11-07 08:21:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:13,092 INFO L93 Difference]: Finished difference Result 319 states and 382 transitions. [2021-11-07 08:21:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-07 08:21:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.4086021505376345) internal successors, (224), 93 states have internal predecessors, (224), 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 215 [2021-11-07 08:21:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:13,094 INFO L225 Difference]: With dead ends: 319 [2021-11-07 08:21:13,094 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 08:21:13,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2480, Invalid=6076, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:21:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 08:21:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-11-07 08:21:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1441441441441442) internal successors, (254), 222 states have internal predecessors, (254), 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) [2021-11-07 08:21:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2021-11-07 08:21:13,101 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 215 [2021-11-07 08:21:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:13,101 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2021-11-07 08:21:13,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.4086021505376345) internal successors, (224), 93 states have internal predecessors, (224), 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) [2021-11-07 08:21:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2021-11-07 08:21:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-07 08:21:13,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:13,105 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:13,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:13,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:13,320 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -2058009461, now seen corresponding path program 61 times [2021-11-07 08:21:13,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:13,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643261964] [2021-11-07 08:21:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:13,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5091 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-11-07 08:21:14,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:14,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643261964] [2021-11-07 08:21:14,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643261964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:14,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856678328] [2021-11-07 08:21:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:21:14,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:14,828 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:14,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 08:21:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 08:21:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5091 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-11-07 08:21:17,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856678328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:17,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:17,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-07 08:21:17,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640015376] [2021-11-07 08:21:17,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 08:21:17,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 08:21:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:21:17,362 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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) [2021-11-07 08:21:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:17,514 INFO L93 Difference]: Finished difference Result 322 states and 384 transitions. [2021-11-07 08:21:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:21:17,515 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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 220 [2021-11-07 08:21:17,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:17,516 INFO L225 Difference]: With dead ends: 322 [2021-11-07 08:21:17,516 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 08:21:17,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:21:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 08:21:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-11-07 08:21:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.1428571428571428) internal successors, (256), 224 states have internal predecessors, (256), 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) [2021-11-07 08:21:17,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 256 transitions. [2021-11-07 08:21:17,529 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 256 transitions. Word has length 220 [2021-11-07 08:21:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:17,529 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 256 transitions. [2021-11-07 08:21:17,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 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) [2021-11-07 08:21:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 256 transitions. [2021-11-07 08:21:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-07 08:21:17,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:17,531 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:17,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:17,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:17,756 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash 957330061, now seen corresponding path program 62 times [2021-11-07 08:21:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:17,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761944222] [2021-11-07 08:21:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:17,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5216 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-11-07 08:21:19,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:19,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761944222] [2021-11-07 08:21:19,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761944222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:19,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745489332] [2021-11-07 08:21:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:21:19,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:19,230 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:19,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 08:21:21,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:21:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:21,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 08:21:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5216 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-11-07 08:21:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745489332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:21,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:21,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-07 08:21:21,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849503171] [2021-11-07 08:21:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 08:21:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 08:21:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:21:21,713 INFO L87 Difference]: Start difference. First operand 225 states and 256 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 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) [2021-11-07 08:21:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:21,844 INFO L93 Difference]: Finished difference Result 324 states and 386 transitions. [2021-11-07 08:21:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 08:21:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 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 222 [2021-11-07 08:21:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:21,846 INFO L225 Difference]: With dead ends: 324 [2021-11-07 08:21:21,846 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 08:21:21,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:21:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 08:21:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-11-07 08:21:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.1415929203539823) internal successors, (258), 226 states have internal predecessors, (258), 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) [2021-11-07 08:21:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 258 transitions. [2021-11-07 08:21:21,853 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 258 transitions. Word has length 222 [2021-11-07 08:21:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:21,853 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 258 transitions. [2021-11-07 08:21:21,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 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) [2021-11-07 08:21:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 258 transitions. [2021-11-07 08:21:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 08:21:21,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:21,855 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:21,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:22,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-07 08:21:22,068 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash -404314097, now seen corresponding path program 63 times [2021-11-07 08:21:22,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:22,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247120235] [2021-11-07 08:21:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:22,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2021-11-07 08:21:23,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247120235] [2021-11-07 08:21:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247120235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:23,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190945416] [2021-11-07 08:21:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:21:23,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:23,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:23,719 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 08:21:31,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-07 08:21:31,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:31,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 08:21:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5343 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2021-11-07 08:21:32,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190945416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:32,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:32,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 32] total 97 [2021-11-07 08:21:32,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780928886] [2021-11-07 08:21:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 08:21:32,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 08:21:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=6606, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:21:32,606 INFO L87 Difference]: Start difference. First operand 227 states and 258 transitions. Second operand has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 97 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:32,866 INFO L93 Difference]: Finished difference Result 331 states and 396 transitions. [2021-11-07 08:21:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 08:21:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 97 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2021-11-07 08:21:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:32,867 INFO L225 Difference]: With dead ends: 331 [2021-11-07 08:21:32,867 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 08:21:32,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2706, Invalid=6606, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:21:32,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 08:21:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2021-11-07 08:21:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.1428571428571428) internal successors, (264), 231 states have internal predecessors, (264), 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) [2021-11-07 08:21:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2021-11-07 08:21:32,874 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 224 [2021-11-07 08:21:32,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:32,874 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2021-11-07 08:21:32,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.402061855670103) internal successors, (233), 97 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:32,875 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2021-11-07 08:21:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-07 08:21:32,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:32,876 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:32,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:33,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:33,096 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:33,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:33,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1114752076, now seen corresponding path program 64 times [2021-11-07 08:21:33,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:33,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345302134] [2021-11-07 08:21:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:33,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5560 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-11-07 08:21:34,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:34,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345302134] [2021-11-07 08:21:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345302134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:34,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544894812] [2021-11-07 08:21:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:21:34,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:34,764 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:34,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 08:21:36,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:21:36,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:36,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 08:21:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5560 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-11-07 08:21:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544894812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:37,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:37,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-07 08:21:37,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665179628] [2021-11-07 08:21:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 08:21:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 08:21:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:21:37,526 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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) [2021-11-07 08:21:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:37,673 INFO L93 Difference]: Finished difference Result 334 states and 398 transitions. [2021-11-07 08:21:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 08:21:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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 229 [2021-11-07 08:21:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:37,682 INFO L225 Difference]: With dead ends: 334 [2021-11-07 08:21:37,682 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 08:21:37,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 08:21:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 08:21:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2021-11-07 08:21:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1416309012875536) internal successors, (266), 233 states have internal predecessors, (266), 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) [2021-11-07 08:21:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 266 transitions. [2021-11-07 08:21:37,691 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 266 transitions. Word has length 229 [2021-11-07 08:21:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:37,691 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 266 transitions. [2021-11-07 08:21:37,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 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) [2021-11-07 08:21:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 266 transitions. [2021-11-07 08:21:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-07 08:21:37,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:37,694 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:37,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:37,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:37,909 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash 306343922, now seen corresponding path program 65 times [2021-11-07 08:21:37,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:37,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156795393] [2021-11-07 08:21:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:37,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2021-11-07 08:21:39,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:39,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156795393] [2021-11-07 08:21:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156795393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:39,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217195113] [2021-11-07 08:21:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:21:39,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:39,705 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:39,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 08:23:28,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-11-07 08:23:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:23:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:23:28,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:23:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 4356 trivial. 0 not checked. [2021-11-07 08:23:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217195113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:30,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:23:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 33] total 100 [2021-11-07 08:23:30,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597952829] [2021-11-07 08:23:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-07 08:23:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:23:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-07 08:23:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2873, Invalid=7027, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:23:30,203 INFO L87 Difference]: Start difference. First operand 234 states and 266 transitions. Second operand has 100 states, 100 states have (on average 2.4) internal successors, (240), 100 states have internal predecessors, (240), 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) [2021-11-07 08:23:30,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:23:30,478 INFO L93 Difference]: Finished difference Result 341 states and 408 transitions. [2021-11-07 08:23:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-07 08:23:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 100 states have internal predecessors, (240), 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 231 [2021-11-07 08:23:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:23:30,480 INFO L225 Difference]: With dead ends: 341 [2021-11-07 08:23:30,480 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 08:23:30,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2873, Invalid=7027, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:23:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 08:23:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2021-11-07 08:23:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.1428571428571428) internal successors, (272), 238 states have internal predecessors, (272), 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) [2021-11-07 08:23:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 272 transitions. [2021-11-07 08:23:30,487 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 272 transitions. Word has length 231 [2021-11-07 08:23:30,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:23:30,487 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 272 transitions. [2021-11-07 08:23:30,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 100 states have internal predecessors, (240), 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) [2021-11-07 08:23:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 272 transitions. [2021-11-07 08:23:30,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-07 08:23:30,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:23:30,489 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:23:30,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 08:23:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-07 08:23:30,716 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:23:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:23:30,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1783047243, now seen corresponding path program 66 times [2021-11-07 08:23:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:23:30,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476530263] [2021-11-07 08:23:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:23:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:23:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:23:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5915 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-11-07 08:23:32,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:23:32,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476530263] [2021-11-07 08:23:32,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476530263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:23:32,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523630275] [2021-11-07 08:23:32,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:23:32,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:23:32,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:23:32,430 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:23:32,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b133d9f4-3cf7-4ac3-a773-fc1a5d9ab201/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process