./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array24_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array24_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF --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 b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:38:42,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:38:42,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:38:42,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:38:42,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:38:42,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:38:42,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:38:42,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:38:42,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:38:42,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:38:42,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:38:42,206 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:38:42,207 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:38:42,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:38:42,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:38:42,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:38:42,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:38:42,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:38:42,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:38:42,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:38:42,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:38:42,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:38:42,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:38:42,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:38:42,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:38:42,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:38:42,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:38:42,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:38:42,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:38:42,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:38:42,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:38:42,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:38:42,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:38:42,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:38:42,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:38:42,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:38:42,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:38:42,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:38:42,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:38:42,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:38:42,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:38:42,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:38:42,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:38:42,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:38:42,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:38:42,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:38:42,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:38:42,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:38:42,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:38:42,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:38:42,302 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:38:42,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:38:42,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:38:42,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:38:42,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:38:42,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:38:42,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:38:42,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:38:42,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:38:42,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:38:42,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:38:42,307 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:38:42,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:38:42,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:38:42,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:38:42,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:38:42,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:42,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:38:42,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:38:42,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:38:42,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:38:42,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:38:42,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:38:42,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:38:42,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:38:42,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:38:42,313 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_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2021-11-20 06:38:42,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:38:42,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:38:42,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:38:42,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:38:42,731 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:38:42,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array24_pattern.c [2021-11-20 06:38:42,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/2ed0c01cf/526d280951e54ab285215ab1e9a55e50/FLAG845967a0d [2021-11-20 06:38:43,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:38:43,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c [2021-11-20 06:38:43,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/2ed0c01cf/526d280951e54ab285215ab1e9a55e50/FLAG845967a0d [2021-11-20 06:38:43,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/2ed0c01cf/526d280951e54ab285215ab1e9a55e50 [2021-11-20 06:38:43,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:38:43,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:38:43,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:43,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:38:43,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:38:43,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:43" (1/1) ... [2021-11-20 06:38:43,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d163d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:43, skipping insertion in model container [2021-11-20 06:38:43,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:43" (1/1) ... [2021-11-20 06:38:43,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:38:43,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:38:43,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2021-11-20 06:38:44,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:44,018 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:38:44,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2021-11-20 06:38:44,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:44,065 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:38:44,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44 WrapperNode [2021-11-20 06:38:44,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:44,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:44,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:38:44,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:38:44,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,114 INFO L137 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-11-20 06:38:44,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:44,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:38:44,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:38:44,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:38:44,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:38:44,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:38:44,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:38:44,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:38:44,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (1/1) ... [2021-11-20 06:38:44,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:44,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:44,219 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:38:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:38:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-20 06:38:44,288 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-20 06:38:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:38:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:38:44,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:38:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:38:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:38:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:38:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:38:44,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:38:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:38:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:38:44,411 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:38:44,414 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:38:44,617 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:38:44,624 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:38:44,625 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 06:38:44,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:44 BoogieIcfgContainer [2021-11-20 06:38:44,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:38:44,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:38:44,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:38:44,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:38:44,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:38:43" (1/3) ... [2021-11-20 06:38:44,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b47899b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:44, skipping insertion in model container [2021-11-20 06:38:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:44" (2/3) ... [2021-11-20 06:38:44,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b47899b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:44, skipping insertion in model container [2021-11-20 06:38:44,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:44" (3/3) ... [2021-11-20 06:38:44,651 INFO L111 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2021-11-20 06:38:44,657 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:38:44,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:38:44,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:38:44,758 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 [2021-11-20 06:38:44,759 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:38:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:44,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:38:44,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:44,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:44,807 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2021-11-20 06:38:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919228087] [2021-11-20 06:38:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:44,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:38:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:45,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919228087] [2021-11-20 06:38:45,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919228087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:45,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:45,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:38:45,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071623171] [2021-11-20 06:38:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:45,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:38:45,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:45,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:38:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:45,069 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:38:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:45,097 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2021-11-20 06:38:45,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:38:45,100 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 06:38:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:45,110 INFO L225 Difference]: With dead ends: 77 [2021-11-20 06:38:45,110 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:38:45,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:45,125 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:45,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:38:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 06:38:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-20 06:38:45,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2021-11-20 06:38:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:45,174 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-20 06:38:45,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:38:45,175 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-20 06:38:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:38:45,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:45,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:38:45,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2021-11-20 06:38:45,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:45,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023960154] [2021-11-20 06:38:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:45,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:45,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:45,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996390995] [2021-11-20 06:38:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:45,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:45,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:45,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:38:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:45,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:38:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:38:45,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:45,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023960154] [2021-11-20 06:38:45,551 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996390995] [2021-11-20 06:38:45,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996390995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:45,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:45,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:38:45,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351968260] [2021-11-20 06:38:45,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:45,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:38:45,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:38:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:38:45,555 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:38:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:45,724 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-20 06:38:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:38:45,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 06:38:45,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:45,727 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:38:45,727 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:38:45,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:38:45,730 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:45,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:38:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-11-20 06:38:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-20 06:38:45,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 35 [2021-11-20 06:38:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:45,767 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-20 06:38:45,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:38:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-20 06:38:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:38:45,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:45,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:45,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:45,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:38:45,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:45,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1308831759, now seen corresponding path program 1 times [2021-11-20 06:38:45,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:45,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75233119] [2021-11-20 06:38:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:45,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:45,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:45,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729128496] [2021-11-20 06:38:45,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:45,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:45,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:45,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:38:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:38:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:38:46,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:46,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75233119] [2021-11-20 06:38:46,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:46,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729128496] [2021-11-20 06:38:46,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729128496] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:46,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:46,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:38:46,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143361763] [2021-11-20 06:38:46,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:46,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:38:46,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:38:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:46,331 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:38:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:46,402 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-11-20 06:38:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-11-20 06:38:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:46,404 INFO L225 Difference]: With dead ends: 79 [2021-11-20 06:38:46,405 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 06:38:46,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:38:46,408 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:46,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 06:38:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-20 06:38:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-20 06:38:46,434 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 41 [2021-11-20 06:38:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:46,435 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-20 06:38:46,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:38:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-20 06:38:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:38:46,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:46,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:46,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:46,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:46,664 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2021-11-20 06:38:46,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:46,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748544061] [2021-11-20 06:38:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:46,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:46,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:46,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701552244] [2021-11-20 06:38:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:46,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:46,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:46,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:38:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:38:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:38:46,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:38:47,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748544061] [2021-11-20 06:38:47,303 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701552244] [2021-11-20 06:38:47,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701552244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:47,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:47,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-20 06:38:47,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164451061] [2021-11-20 06:38:47,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:47,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:38:47,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:38:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:38:47,310 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:38:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:47,652 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-11-20 06:38:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:38:47,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-20 06:38:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:47,654 INFO L225 Difference]: With dead ends: 85 [2021-11-20 06:38:47,654 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 06:38:47,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:38:47,657 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:47,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 151 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:38:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 06:38:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-20 06:38:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-20 06:38:47,668 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2021-11-20 06:38:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-20 06:38:47,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:38:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-20 06:38:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:38:47,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:47,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:47,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:47,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:47,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2021-11-20 06:38:47,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:47,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525369497] [2021-11-20 06:38:47,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:47,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:47,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:47,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512487300] [2021-11-20 06:38:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:38:47,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:47,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:47,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:47,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:38:48,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:38:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:48,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:38:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:38:48,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:38:48,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525369497] [2021-11-20 06:38:48,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512487300] [2021-11-20 06:38:48,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512487300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:48,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:48,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 06:38:48,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72830931] [2021-11-20 06:38:48,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:48,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:38:48,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:38:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:38:48,438 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:38:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:48,697 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-11-20 06:38:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:38:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-11-20 06:38:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:48,699 INFO L225 Difference]: With dead ends: 106 [2021-11-20 06:38:48,699 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:38:48,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:38:48,701 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:48,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 198 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:38:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:38:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-11-20 06:38:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:38:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-11-20 06:38:48,726 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2021-11-20 06:38:48,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-11-20 06:38:48,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:38:48,730 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-11-20 06:38:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:38:48,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:48,742 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:48,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:48,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:48,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2021-11-20 06:38:48,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:48,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39345319] [2021-11-20 06:38:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:48,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:48,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814171597] [2021-11-20 06:38:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:38:48,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:48,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:49,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:38:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 06:38:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-20 06:38:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:50,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:38:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:38:50,274 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-20 06:38:50,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 87 [2021-11-20 06:38:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:50,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 22 [2021-11-20 06:38:50,617 INFO L354 Elim1Store]: treesize reduction 182, result has 15.3 percent of original size [2021-11-20 06:38:50,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 96 [2021-11-20 06:38:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:50,664 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-20 06:38:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 10 [2021-11-20 06:38:50,924 INFO L354 Elim1Store]: treesize reduction 376, result has 15.9 percent of original size [2021-11-20 06:38:50,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 137 [2021-11-20 06:38:50,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:38:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:51,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:38:51,047 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-20 06:38:51,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 39 [2021-11-20 06:39:09,906 INFO L354 Elim1Store]: treesize reduction 747, result has 11.7 percent of original size [2021-11-20 06:39:09,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 162 treesize of output 191 [2021-11-20 06:39:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:39:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 53 [2021-11-20 06:39:23,095 INFO L354 Elim1Store]: treesize reduction 343, result has 0.9 percent of original size [2021-11-20 06:39:23,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-11-20 06:39:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:39:23,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:15,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:41:15,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 542 treesize of output 542 [2021-11-20 06:41:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 4 [2021-11-20 06:41:15,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 490 treesize of output 472 [2021-11-20 06:41:15,571 INFO L354 Elim1Store]: treesize reduction 102, result has 44.9 percent of original size [2021-11-20 06:41:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 388614 treesize of output 365131 [2021-11-20 06:41:19,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:41:19,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39345319] [2021-11-20 06:41:19,051 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:41:19,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814171597] [2021-11-20 06:41:19,052 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:41:19,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:19,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-20 06:41:19,052 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-20 06:41:19,053 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-20 06:41:19,061 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:41:19,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:19,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:41:19,274 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2021-11-20 06:41:19,277 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:41:19,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:41:19 BoogieIcfgContainer [2021-11-20 06:41:19,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:41:19,302 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:41:19,302 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:41:19,303 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:41:19,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:44" (3/4) ... [2021-11-20 06:41:19,306 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:41:19,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:41:19,307 INFO L158 Benchmark]: Toolchain (without parser) took 155585.62ms. Allocated memory was 113.2MB in the beginning and 184.5MB in the end (delta: 71.3MB). Free memory was 75.3MB in the beginning and 125.4MB in the end (delta: -50.1MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-11-20 06:41:19,307 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:41:19,308 INFO L158 Benchmark]: CACSL2BoogieTranslator took 342.41ms. Allocated memory is still 113.2MB. Free memory was 75.1MB in the beginning and 87.1MB in the end (delta: -12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:41:19,308 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.23ms. Allocated memory is still 113.2MB. Free memory was 87.1MB in the beginning and 85.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:41:19,309 INFO L158 Benchmark]: Boogie Preprocessor took 56.28ms. Allocated memory is still 113.2MB. Free memory was 85.4MB in the beginning and 84.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:41:19,309 INFO L158 Benchmark]: RCFGBuilder took 455.13ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 71.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 06:41:19,310 INFO L158 Benchmark]: TraceAbstraction took 154672.14ms. Allocated memory was 113.2MB in the beginning and 184.5MB in the end (delta: 71.3MB). Free memory was 71.3MB in the beginning and 125.4MB in the end (delta: -54.2MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. [2021-11-20 06:41:19,310 INFO L158 Benchmark]: Witness Printer took 4.26ms. Allocated memory is still 184.5MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:41:19,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 113.2MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 342.41ms. Allocated memory is still 113.2MB. Free memory was 75.1MB in the beginning and 87.1MB in the end (delta: -12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.23ms. Allocated memory is still 113.2MB. Free memory was 87.1MB in the beginning and 85.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.28ms. Allocated memory is still 113.2MB. Free memory was 85.4MB in the beginning and 84.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 455.13ms. Allocated memory is still 113.2MB. Free memory was 83.8MB in the beginning and 71.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 154672.14ms. Allocated memory was 113.2MB in the beginning and 184.5MB in the end (delta: 71.3MB). Free memory was 71.3MB in the beginning and 125.4MB in the end (delta: -54.2MB). Peak memory consumption was 95.7MB. Max. memory is 16.1GB. * Witness Printer took 4.26ms. Allocated memory is still 184.5MB. Free memory is still 125.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L49] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L50] CALL assume_abort_if_not(ARR_SIZE > 1) [L31] COND FALSE !(!cond) [L50] RET assume_abort_if_not(ARR_SIZE > 1) [L52] int array[ARR_SIZE][ARR_SIZE] ; [L54] int row = 0, column = 0, num = -1 ; [L55] signed long long sum = 0 ; [L56] int temp ; [L57] short index1,index2 ; [L59] row=0 [L59] COND TRUE row=0 && index1 < ARR_SIZE) [L31] COND FALSE !(!cond) [L68] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L69] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND FALSE !(!cond) [L69] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L72] CALL, EXPR outerBoundaryPatternCheck(index1) [L41] COND TRUE (index == 0) || (index == ARR_SIZE-1) [L42] return 1 ; [L72] RET, EXPR outerBoundaryPatternCheck(index1) [L72] EXPR outerBoundaryPatternCheck(index1)||outerBoundaryPatternCheck(index2) [L72] EXPR (outerBoundaryPatternCheck(index1)||outerBoundaryPatternCheck(index2)) ? array[index1][index2] : (num*num) [L72] EXPR array[index1][index2] [L72] EXPR (outerBoundaryPatternCheck(index1)||outerBoundaryPatternCheck(index2)) ? array[index1][index2] : (num*num) [L72] array[index1][index2] = (outerBoundaryPatternCheck(index1)||outerBoundaryPatternCheck(index2)) ? array[index1][index2] : (num*num) [L75] temp = __VERIFIER_nondet_int() [L76] COND TRUE temp == 0 [L79] row=0 [L79] COND TRUE row= 0 && sum <= (ARR_SIZE-2)*(ARR_SIZE-2)) [L33] COND TRUE !(cond) [L33] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 154.5s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 244 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 230 mSDsluCounter, 567 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 395 mSDsCounter, 105 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 515 IncrementalHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 105 mSolverCounterUnsat, 172 mSDtfsCounter, 515 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=5, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 150.7s InterpolantComputationTime, 248 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 334 ConstructedInterpolants, 36 QuantifiedInterpolants, 3634 SizeOfPredicates, 32 NumberOfNonLiveVariables, 718 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 98/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 06:41:19,538 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-20 06:41:19,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array24_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF --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 b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:41:22,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:41:22,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:41:22,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:41:22,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:41:22,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:41:22,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:41:22,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:41:22,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:41:22,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:41:22,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:41:22,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:41:22,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:41:22,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:41:22,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:41:22,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:41:22,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:41:22,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:41:22,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:41:22,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:41:22,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:41:22,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:41:22,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:41:22,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:41:22,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:41:22,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:41:22,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:41:22,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:41:22,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:41:22,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:41:22,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:41:22,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:41:22,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:41:22,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:41:22,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:41:22,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:41:22,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:41:22,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:41:22,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:41:22,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:41:22,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:41:22,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 06:41:22,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:41:22,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:41:22,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:41:22,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:41:22,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:41:22,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:41:22,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:41:22,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:41:22,560 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:41:22,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:41:22,561 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:41:22,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:41:22,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:41:22,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:41:22,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:41:22,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:41:22,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:41:22,564 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:41:22,564 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:41:22,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:41:22,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:41:22,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:41:22,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:41:22,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:41:22,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:41:22,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:41:22,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:41:22,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:41:22,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:41:22,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:41:22,568 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:41:22,568 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:41:22,569 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:41:22,569 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:41:22,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:41:22,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:41:22,570 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:41:22,570 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2021-11-20 06:41:23,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:41:23,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:41:23,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:41:23,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:41:23,057 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:41:23,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array24_pattern.c [2021-11-20 06:41:23,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/0af585703/da9eb15d4fd6496790c150a32e941644/FLAG94370126d [2021-11-20 06:41:23,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:41:23,750 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c [2021-11-20 06:41:23,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/0af585703/da9eb15d4fd6496790c150a32e941644/FLAG94370126d [2021-11-20 06:41:24,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/data/0af585703/da9eb15d4fd6496790c150a32e941644 [2021-11-20 06:41:24,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:41:24,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:41:24,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:41:24,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:41:24,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:41:24,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1018fa4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24, skipping insertion in model container [2021-11-20 06:41:24,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:41:24,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:41:24,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2021-11-20 06:41:24,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:41:24,378 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:41:24,417 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2021-11-20 06:41:24,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:41:24,492 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:41:24,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24 WrapperNode [2021-11-20 06:41:24,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:41:24,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:41:24,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:41:24,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:41:24,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,545 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2021-11-20 06:41:24,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:41:24,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:41:24,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:41:24,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:41:24,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:41:24,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:41:24,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:41:24,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:41:24,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (1/1) ... [2021-11-20 06:41:24,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:41:24,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:41:24,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:41:24,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:41:24,732 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-20 06:41:24,733 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-20 06:41:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:41:24,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:41:24,734 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:41:24,734 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:41:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:41:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 06:41:24,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:41:24,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:41:24,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:41:24,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 06:41:24,870 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:41:24,871 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:41:25,563 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:41:25,571 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:41:25,572 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 06:41:25,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:41:25 BoogieIcfgContainer [2021-11-20 06:41:25,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:41:25,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:41:25,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:41:25,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:41:25,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:41:24" (1/3) ... [2021-11-20 06:41:25,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd3f164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:41:25, skipping insertion in model container [2021-11-20 06:41:25,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:41:24" (2/3) ... [2021-11-20 06:41:25,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd3f164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:41:25, skipping insertion in model container [2021-11-20 06:41:25,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:41:25" (3/3) ... [2021-11-20 06:41:25,585 INFO L111 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2021-11-20 06:41:25,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:41:25,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:41:25,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:41:25,695 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 [2021-11-20 06:41:25,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:41:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:41:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:41:25,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:25,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:25,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2021-11-20 06:41:25,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119686016] [2021-11-20 06:41:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:25,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:25,767 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:25,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:41:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:41:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:41:26,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:26,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119686016] [2021-11-20 06:41:26,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119686016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:41:26,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:41:26,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:41:26,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806705089] [2021-11-20 06:41:26,224 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:26,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:41:26,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:41:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:41:26,283 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:41:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:26,330 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2021-11-20 06:41:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:41:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 06:41:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:26,345 INFO L225 Difference]: With dead ends: 77 [2021-11-20 06:41:26,345 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:41:26,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:41:26,356 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:26,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:41:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:41:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 06:41:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:41:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-20 06:41:26,426 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2021-11-20 06:41:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-20 06:41:26,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:41:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-20 06:41:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:41:26,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:26,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:26,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:26,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:26,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:26,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2021-11-20 06:41:26,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:26,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136201859] [2021-11-20 06:41:26,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:26,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:26,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:26,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:41:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:41:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:41:27,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:41:27,958 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136201859] [2021-11-20 06:41:27,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136201859] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:27,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:41:27,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:41:27,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718038889] [2021-11-20 06:41:27,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:41:27,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:41:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:27,972 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:41:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:28,008 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-11-20 06:41:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:41:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 06:41:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:28,011 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:41:28,011 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 06:41:28,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:28,014 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:28,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2021-11-20 06:41:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 06:41:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-20 06:41:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:41:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-11-20 06:41:28,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 35 [2021-11-20 06:41:28,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:28,029 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-11-20 06:41:28,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:41:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-11-20 06:41:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:41:28,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:28,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:28,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:28,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:28,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1511137102, now seen corresponding path program 1 times [2021-11-20 06:41:28,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868239] [2021-11-20 06:41:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:28,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:28,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:28,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:41:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:41:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:41:28,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:41:29,313 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868239] [2021-11-20 06:41:29,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868239] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:29,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:41:29,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-11-20 06:41:29,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581020701] [2021-11-20 06:41:29,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:29,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:41:29,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:41:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:29,316 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:41:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:29,347 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2021-11-20 06:41:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:41:29,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-20 06:41:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:29,352 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:41:29,354 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 06:41:29,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:29,358 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:29,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 70 Unchecked, 0.0s Time] [2021-11-20 06:41:29,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 06:41:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 06:41:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:41:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-20 06:41:29,383 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 38 [2021-11-20 06:41:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:29,384 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-20 06:41:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:41:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-20 06:41:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:41:29,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:29,393 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:29,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:29,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -50149008, now seen corresponding path program 1 times [2021-11-20 06:41:29,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496385342] [2021-11-20 06:41:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:29,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:29,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:29,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:41:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:41:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:41:30,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:41:30,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496385342] [2021-11-20 06:41:30,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496385342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:30,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:30,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-20 06:41:30,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648407962] [2021-11-20 06:41:30,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:30,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:41:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:41:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:41:30,707 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:31,044 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2021-11-20 06:41:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:41:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2021-11-20 06:41:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:31,046 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:41:31,047 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 06:41:31,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:41:31,049 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:31,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 129 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2021-11-20 06:41:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 06:41:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 06:41:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:41:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-20 06:41:31,062 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 40 [2021-11-20 06:41:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:31,063 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-20 06:41:31,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:31,064 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-20 06:41:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:41:31,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:31,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:31,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:31,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:31,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -494896466, now seen corresponding path program 2 times [2021-11-20 06:41:31,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778223968] [2021-11-20 06:41:31,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:31,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:31,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:31,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:31,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:41:31,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:31,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:41:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:41:32,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:41:32,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778223968] [2021-11-20 06:41:32,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778223968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:32,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:32,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-20 06:41:32,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678757616] [2021-11-20 06:41:32,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:32,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:41:32,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:41:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:41:32,660 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:33,165 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-20 06:41:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:41:33,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 42 [2021-11-20 06:41:33,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:33,171 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:41:33,171 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 06:41:33,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:41:33,173 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:33,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 158 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2021-11-20 06:41:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 06:41:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-11-20 06:41:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-20 06:41:33,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-11-20 06:41:33,189 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 42 [2021-11-20 06:41:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-11-20 06:41:33,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-11-20 06:41:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 06:41:33,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:33,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:33,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:33,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:33,410 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1708514187, now seen corresponding path program 1 times [2021-11-20 06:41:33,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:33,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484918360] [2021-11-20 06:41:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:33,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:33,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:33,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:41:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:41:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:41:34,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:41:35,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:35,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484918360] [2021-11-20 06:41:35,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484918360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:35,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:35,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-20 06:41:35,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489984795] [2021-11-20 06:41:35,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:35,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:41:35,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:41:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:41:35,359 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:35,647 INFO L93 Difference]: Finished difference Result 130 states and 169 transitions. [2021-11-20 06:41:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:41:35,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2021-11-20 06:41:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:35,652 INFO L225 Difference]: With dead ends: 130 [2021-11-20 06:41:35,653 INFO L226 Difference]: Without dead ends: 78 [2021-11-20 06:41:35,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:41:35,655 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 249 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 56 Unchecked, 0.0s Time] [2021-11-20 06:41:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-20 06:41:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-11-20 06:41:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-20 06:41:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-11-20 06:41:35,671 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 45 [2021-11-20 06:41:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:35,671 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-11-20 06:41:35,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-11-20 06:41:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:41:35,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:35,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:35,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:35,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:35,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1484083089, now seen corresponding path program 2 times [2021-11-20 06:41:35,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841278270] [2021-11-20 06:41:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:35,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:35,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:35,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:41:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:41:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:41:36,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:41:37,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841278270] [2021-11-20 06:41:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841278270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:37,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:37,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-20 06:41:37,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900113018] [2021-11-20 06:41:37,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:37,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:41:37,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:41:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:41:37,366 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:37,745 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2021-11-20 06:41:37,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:41:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2021-11-20 06:41:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:37,748 INFO L225 Difference]: With dead ends: 101 [2021-11-20 06:41:37,749 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 06:41:37,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:41:37,768 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 52 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:37,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 173 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-11-20 06:41:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 06:41:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-11-20 06:41:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-20 06:41:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2021-11-20 06:41:37,790 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 48 [2021-11-20 06:41:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:37,790 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2021-11-20 06:41:37,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2021-11-20 06:41:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:41:37,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:37,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:37,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:38,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:38,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash 434964531, now seen corresponding path program 1 times [2021-11-20 06:41:38,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:38,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228342181] [2021-11-20 06:41:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:38,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:38,014 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:38,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:41:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:41:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:41:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:41:39,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228342181] [2021-11-20 06:41:39,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228342181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:39,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:39,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 06:41:39,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613618078] [2021-11-20 06:41:39,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:41:39,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:41:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:41:39,568 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:40,498 INFO L93 Difference]: Finished difference Result 186 states and 252 transitions. [2021-11-20 06:41:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:41:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-11-20 06:41:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:40,501 INFO L225 Difference]: With dead ends: 186 [2021-11-20 06:41:40,502 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 06:41:40,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:40,504 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:40,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 180 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 111 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2021-11-20 06:41:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 06:41:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2021-11-20 06:41:40,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 88 states have internal predecessors, (114), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-20 06:41:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-11-20 06:41:40,525 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 50 [2021-11-20 06:41:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:40,526 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-11-20 06:41:40,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:41:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2021-11-20 06:41:40,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 06:41:40,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:40,529 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:40,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:40,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:40,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1360318877, now seen corresponding path program 2 times [2021-11-20 06:41:40,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:40,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803363051] [2021-11-20 06:41:40,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:41:40,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:40,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:40,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:41:40,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:41:40,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:41:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:41:42,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:41:43,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803363051] [2021-11-20 06:41:43,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803363051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:43,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-20 06:41:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004036321] [2021-11-20 06:41:43,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:43,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:41:43,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:41:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:43,073 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:44,695 INFO L93 Difference]: Finished difference Result 259 states and 360 transitions. [2021-11-20 06:41:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:41:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-11-20 06:41:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:44,700 INFO L225 Difference]: With dead ends: 259 [2021-11-20 06:41:44,701 INFO L226 Difference]: Without dead ends: 255 [2021-11-20 06:41:44,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:41:44,703 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 124 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:44,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 540 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 272 Unchecked, 0.9s Time] [2021-11-20 06:41:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-20 06:41:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2021-11-20 06:41:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.3540372670807452) internal successors, (218), 161 states have internal predecessors, (218), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2021-11-20 06:41:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 271 transitions. [2021-11-20 06:41:44,739 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 271 transitions. Word has length 53 [2021-11-20 06:41:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:44,740 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 271 transitions. [2021-11-20 06:41:44,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 271 transitions. [2021-11-20 06:41:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:41:44,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:44,744 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:44,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:44,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:44,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2106651293, now seen corresponding path program 1 times [2021-11-20 06:41:44,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:44,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225269459] [2021-11-20 06:41:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:44,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:44,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:44,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:41:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:45,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:41:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-20 06:41:45,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:41:45,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:45,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225269459] [2021-11-20 06:41:45,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225269459] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:41:45,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:41:45,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-20 06:41:45,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432789376] [2021-11-20 06:41:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:41:45,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:41:45,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:41:45,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:41:45,410 INFO L87 Difference]: Start difference. First operand 196 states and 271 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:41:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:45,588 INFO L93 Difference]: Finished difference Result 324 states and 448 transitions. [2021-11-20 06:41:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:41:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2021-11-20 06:41:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:45,597 INFO L225 Difference]: With dead ends: 324 [2021-11-20 06:41:45,597 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:41:45,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:41:45,604 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:45,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 164 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:41:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:41:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2021-11-20 06:41:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 145 states have (on average 1.289655172413793) internal successors, (187), 144 states have internal predecessors, (187), 17 states have call successors, (17), 7 states have call predecessors, (17), 9 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-20 06:41:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2021-11-20 06:41:45,641 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 54 [2021-11-20 06:41:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:45,642 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2021-11-20 06:41:45,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:41:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2021-11-20 06:41:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:41:45,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:45,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:45,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:45,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:45,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash -175998025, now seen corresponding path program 3 times [2021-11-20 06:41:45,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:45,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497831291] [2021-11-20 06:41:45,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:41:45,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:45,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:45,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:41:46,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:41:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:41:46,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:41:46,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:41:48,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:48,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497831291] [2021-11-20 06:41:48,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497831291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:48,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 06:41:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920312012] [2021-11-20 06:41:48,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:48,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:41:48,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:41:48,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:41:48,480 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 06:41:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:48,998 INFO L93 Difference]: Finished difference Result 236 states and 311 transitions. [2021-11-20 06:41:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:41:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-11-20 06:41:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:49,004 INFO L225 Difference]: With dead ends: 236 [2021-11-20 06:41:49,004 INFO L226 Difference]: Without dead ends: 232 [2021-11-20 06:41:49,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:41:49,006 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 84 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:49,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 190 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-11-20 06:41:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-20 06:41:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2021-11-20 06:41:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 123 states have internal predecessors, (157), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (19), 17 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-20 06:41:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2021-11-20 06:41:49,033 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 54 [2021-11-20 06:41:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:49,033 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2021-11-20 06:41:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 5 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 06:41:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2021-11-20 06:41:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 06:41:49,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:49,036 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:49,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:49,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:49,248 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:49,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash -409666130, now seen corresponding path program 3 times [2021-11-20 06:41:49,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:49,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319567010] [2021-11-20 06:41:49,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:41:49,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:49,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:49,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:49,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:41:49,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:41:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:41:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:41:50,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:41:51,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:51,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319567010] [2021-11-20 06:41:51,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319567010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:51,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:51,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-20 06:41:51,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783996979] [2021-11-20 06:41:51,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:51,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:41:51,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:51,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:41:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:41:51,242 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:51,770 INFO L93 Difference]: Finished difference Result 202 states and 259 transitions. [2021-11-20 06:41:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:41:51,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-11-20 06:41:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:51,773 INFO L225 Difference]: With dead ends: 202 [2021-11-20 06:41:51,773 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 06:41:51,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:51,775 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 85 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:51,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 159 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2021-11-20 06:41:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 06:41:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 182. [2021-11-20 06:41:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 153 states have (on average 1.2549019607843137) internal successors, (192), 152 states have internal predecessors, (192), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-20 06:41:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2021-11-20 06:41:51,799 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 55 [2021-11-20 06:41:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:51,799 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 232 transitions. [2021-11-20 06:41:51,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 232 transitions. [2021-11-20 06:41:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:41:51,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:51,802 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:51,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:52,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:52,017 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1608098576, now seen corresponding path program 4 times [2021-11-20 06:41:52,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:52,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556920713] [2021-11-20 06:41:52,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:41:52,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:52,019 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:52,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:41:52,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:41:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:41:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:41:53,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 06:41:53,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:53,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556920713] [2021-11-20 06:41:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556920713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:53,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:53,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-20 06:41:53,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160195727] [2021-11-20 06:41:53,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:53,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:41:53,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:41:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:41:53,641 INFO L87 Difference]: Start difference. First operand 182 states and 232 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:54,050 INFO L93 Difference]: Finished difference Result 245 states and 316 transitions. [2021-11-20 06:41:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:41:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2021-11-20 06:41:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:54,053 INFO L225 Difference]: With dead ends: 245 [2021-11-20 06:41:54,054 INFO L226 Difference]: Without dead ends: 222 [2021-11-20 06:41:54,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:41:54,055 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 69 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:54,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 238 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2021-11-20 06:41:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-20 06:41:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-11-20 06:41:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 154 states have (on average 1.2662337662337662) internal successors, (195), 154 states have internal predecessors, (195), 17 states have call successors, (17), 9 states have call predecessors, (17), 12 states have return successors, (23), 20 states have call predecessors, (23), 17 states have call successors, (23) [2021-11-20 06:41:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 235 transitions. [2021-11-20 06:41:54,082 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 235 transitions. Word has length 57 [2021-11-20 06:41:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:54,082 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 235 transitions. [2021-11-20 06:41:54,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:41:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 235 transitions. [2021-11-20 06:41:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:41:54,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:54,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:54,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:41:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:54,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1872717108, now seen corresponding path program 5 times [2021-11-20 06:41:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964572705] [2021-11-20 06:41:54,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:41:54,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:54,304 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:54,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:41:54,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 06:41:54,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:41:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:41:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:41:55,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:41:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-20 06:41:55,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:41:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964572705] [2021-11-20 06:41:55,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964572705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:41:55,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:41:55,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-11-20 06:41:55,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716824448] [2021-11-20 06:41:55,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:41:55,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:41:55,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:41:55,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:41:55,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:41:55,432 INFO L87 Difference]: Start difference. First operand 184 states and 235 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:41:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:41:57,348 INFO L93 Difference]: Finished difference Result 427 states and 556 transitions. [2021-11-20 06:41:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:41:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2021-11-20 06:41:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:41:57,353 INFO L225 Difference]: With dead ends: 427 [2021-11-20 06:41:57,353 INFO L226 Difference]: Without dead ends: 320 [2021-11-20 06:41:57,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:41:57,355 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 135 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:41:57,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 285 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 06:41:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-20 06:41:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 225. [2021-11-20 06:41:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 188 states have (on average 1.2287234042553192) internal successors, (231), 188 states have internal predecessors, (231), 21 states have call successors, (21), 11 states have call predecessors, (21), 15 states have return successors, (29), 25 states have call predecessors, (29), 21 states have call successors, (29) [2021-11-20 06:41:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 281 transitions. [2021-11-20 06:41:57,392 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 281 transitions. Word has length 57 [2021-11-20 06:41:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:41:57,393 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 281 transitions. [2021-11-20 06:41:57,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-20 06:41:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 281 transitions. [2021-11-20 06:41:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 06:41:57,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:41:57,396 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:41:57,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 06:41:57,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:41:57,611 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:41:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:41:57,612 INFO L85 PathProgramCache]: Analyzing trace with hash 989567329, now seen corresponding path program 1 times [2021-11-20 06:41:57,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:41:57,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744998986] [2021-11-20 06:41:57,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:41:57,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:41:57,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:41:57,614 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:41:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:41:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:41:57,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:41:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:41:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:41:58,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:42:00,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:00,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744998986] [2021-11-20 06:42:00,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744998986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:00,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:00,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-11-20 06:42:00,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573860855] [2021-11-20 06:42:00,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:42:00,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:42:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:42:00,275 INFO L87 Difference]: Start difference. First operand 225 states and 281 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:42:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:07,640 INFO L93 Difference]: Finished difference Result 420 states and 535 transitions. [2021-11-20 06:42:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 06:42:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-11-20 06:42:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:07,645 INFO L225 Difference]: With dead ends: 420 [2021-11-20 06:42:07,645 INFO L226 Difference]: Without dead ends: 292 [2021-11-20 06:42:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:42:07,648 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:07,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 258 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 266 Invalid, 0 Unknown, 76 Unchecked, 2.1s Time] [2021-11-20 06:42:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-20 06:42:07,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 258. [2021-11-20 06:42:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 221 states have (on average 1.257918552036199) internal successors, (278), 221 states have internal predecessors, (278), 21 states have call successors, (21), 11 states have call predecessors, (21), 15 states have return successors, (29), 25 states have call predecessors, (29), 21 states have call successors, (29) [2021-11-20 06:42:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 328 transitions. [2021-11-20 06:42:07,696 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 328 transitions. Word has length 59 [2021-11-20 06:42:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:07,697 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 328 transitions. [2021-11-20 06:42:07,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:42:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 328 transitions. [2021-11-20 06:42:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:42:07,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:07,700 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:07,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:07,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:07,912 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1640328777, now seen corresponding path program 2 times [2021-11-20 06:42:07,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340953072] [2021-11-20 06:42:07,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:42:07,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:07,925 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:07,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:42:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:42:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:42:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:42:09,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 06:42:09,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340953072] [2021-11-20 06:42:09,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340953072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:09,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:09,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-20 06:42:09,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3554761] [2021-11-20 06:42:09,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:09,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:42:09,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:42:09,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:42:09,532 INFO L87 Difference]: Start difference. First operand 258 states and 328 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:42:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:09,813 INFO L93 Difference]: Finished difference Result 274 states and 347 transitions. [2021-11-20 06:42:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:42:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2021-11-20 06:42:09,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:09,825 INFO L225 Difference]: With dead ends: 274 [2021-11-20 06:42:09,826 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 06:42:09,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:42:09,827 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:09,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2021-11-20 06:42:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 06:42:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2021-11-20 06:42:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 200 states have (on average 1.25) internal successors, (250), 201 states have internal predecessors, (250), 18 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (25), 21 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-20 06:42:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 293 transitions. [2021-11-20 06:42:09,869 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 293 transitions. Word has length 60 [2021-11-20 06:42:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:09,870 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 293 transitions. [2021-11-20 06:42:09,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:42:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 293 transitions. [2021-11-20 06:42:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:42:09,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:09,873 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:09,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:10,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1008155692, now seen corresponding path program 6 times [2021-11-20 06:42:10,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:10,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867390443] [2021-11-20 06:42:10,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:42:10,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:10,090 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:10,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:42:10,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-20 06:42:10,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:42:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:42:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 06:42:11,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:42:13,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:13,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867390443] [2021-11-20 06:42:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867390443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:13,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:13,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-11-20 06:42:13,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592989554] [2021-11-20 06:42:13,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:13,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:42:13,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:42:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:42:13,254 INFO L87 Difference]: Start difference. First operand 234 states and 293 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:42:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:16,248 INFO L93 Difference]: Finished difference Result 327 states and 410 transitions. [2021-11-20 06:42:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:42:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-11-20 06:42:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:16,263 INFO L225 Difference]: With dead ends: 327 [2021-11-20 06:42:16,263 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 06:42:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:42:16,265 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:16,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 376 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 217 Unchecked, 0.2s Time] [2021-11-20 06:42:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 06:42:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 231. [2021-11-20 06:42:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 197 states have (on average 1.2385786802030456) internal successors, (244), 198 states have internal predecessors, (244), 18 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (25), 21 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-20 06:42:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 287 transitions. [2021-11-20 06:42:16,307 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 287 transitions. Word has length 61 [2021-11-20 06:42:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:16,307 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 287 transitions. [2021-11-20 06:42:16,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 06:42:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 287 transitions. [2021-11-20 06:42:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:42:16,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:16,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:16,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:16,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:16,525 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:42:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 7 times [2021-11-20 06:42:16,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:16,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520578536] [2021-11-20 06:42:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:42:16,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:16,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:16,528 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:16,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1865df2a-22e0-4d93-89ca-405aa6c48623/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:42:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 06:42:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:17,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 06:42:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 06:42:19,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:19,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:19,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:42:19,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-20 06:42:20,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:20,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:42:20,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-20 06:42:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:23,761 INFO L354 Elim1Store]: treesize reduction 292, result has 12.6 percent of original size [2021-11-20 06:42:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 99 treesize of output 91 [2021-11-20 06:42:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:26,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:42:26,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:42:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 17 [2021-11-20 06:42:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:42:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 247 [2021-11-20 06:49:45,508 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-11-20 06:49:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3276064 treesize of output 3190094 [2021-11-20 06:49:58,438 WARN L227 SmtUtils]: Spent 12.93s on a formula simplification that was a NOOP. DAG size: 390 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:50:24,559 WARN L227 SmtUtils]: Spent 16.11s on a formula simplification that was a NOOP. DAG size: 385 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:50:56,289 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 365 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)