./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0 --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 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:16:11,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:16:11,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:16:11,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:16:11,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:16:11,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:16:11,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:16:11,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:16:11,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:16:11,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:16:11,205 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:16:11,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:16:11,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:16:11,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:16:11,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:16:11,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:16:11,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:16:11,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:16:11,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:16:11,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:16:11,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:16:11,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:16:11,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:16:11,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:16:11,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:16:11,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:16:11,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:16:11,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:16:11,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:16:11,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:16:11,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:16:11,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:16:11,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:16:11,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:16:11,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:16:11,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:16:11,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:16:11,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:16:11,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:16:11,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:16:11,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:16:11,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:16:11,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:16:11,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:16:11,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:16:11,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:16:11,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:16:11,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:16:11,329 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:16:11,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:16:11,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:16:11,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:16:11,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:16:11,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:16:11,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:16:11,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:16:11,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:16:11,333 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:16:11,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:16:11,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:16:11,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:16:11,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:16:11,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:16:11,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:16:11,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:11,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:16:11,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:16:11,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:16:11,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:16:11,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:16:11,337 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:16:11,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:16:11,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:16:11,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:16:11,340 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_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9597042154fc2fc3c1808d4beed7ae6070061c42e65231c1781a660590e51714 [2021-11-22 16:16:11,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:16:11,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:16:11,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:16:11,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:16:11,740 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:16:11,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/mapavg1.i [2021-11-22 16:16:11,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/data/ca3f92584/779781d5d3e44393901b35823e0d937a/FLAG64b2bfef6 [2021-11-22 16:16:12,496 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:16:12,498 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/sv-benchmarks/c/array-crafted/mapavg1.i [2021-11-22 16:16:12,513 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/data/ca3f92584/779781d5d3e44393901b35823e0d937a/FLAG64b2bfef6 [2021-11-22 16:16:12,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/data/ca3f92584/779781d5d3e44393901b35823e0d937a [2021-11-22 16:16:12,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:16:12,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:16:12,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:12,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:16:12,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:16:12,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:12" (1/1) ... [2021-11-22 16:16:12,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f45913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:12, skipping insertion in model container [2021-11-22 16:16:12,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:12" (1/1) ... [2021-11-22 16:16:12,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:16:12,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:16:13,116 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_7fd568ea-3abb-4af4-a791-b7be02bd8509/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2021-11-22 16:16:13,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:13,141 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:16:13,166 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_7fd568ea-3abb-4af4-a791-b7be02bd8509/sv-benchmarks/c/array-crafted/mapavg1.i[1306,1319] [2021-11-22 16:16:13,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:13,186 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:16:13,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13 WrapperNode [2021-11-22 16:16:13,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:13,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:13,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:16:13,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:16:13,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,247 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 118 [2021-11-22 16:16:13,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:16:13,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:16:13,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:16:13,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:16:13,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:16:13,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:16:13,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:16:13,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:16:13,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (1/1) ... [2021-11-22 16:16:13,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:13,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:16:13,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:16:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:16:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:16:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:16:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 16:16:13,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:16:13,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:16:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:16:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:16:13,566 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:16:13,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:16:13,919 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:16:13,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:16:13,941 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 16:16:13,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:13 BoogieIcfgContainer [2021-11-22 16:16:13,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:16:13,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:16:13,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:16:13,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:16:13,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:16:12" (1/3) ... [2021-11-22 16:16:13,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc9579c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:13, skipping insertion in model container [2021-11-22 16:16:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:13" (2/3) ... [2021-11-22 16:16:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dc9579c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:16:13, skipping insertion in model container [2021-11-22 16:16:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:16:13" (3/3) ... [2021-11-22 16:16:13,955 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2021-11-22 16:16:13,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:16:13,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 16:16:14,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:16:14,088 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 [2021-11-22 16:16:14,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 16:16:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:16:14,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:14,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:14,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-22 16:16:14,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:14,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506454855] [2021-11-22 16:16:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:14,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:14,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:14,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506454855] [2021-11-22 16:16:14,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506454855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:14,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:16:14,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:16:14,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72134719] [2021-11-22 16:16:14,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:14,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:14,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:14,505 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:14,562 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-22 16:16:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 16:16:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:14,578 INFO L225 Difference]: With dead ends: 52 [2021-11-22 16:16:14,578 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 16:16:14,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:16:14,590 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:14,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 16:16:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-22 16:16:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-22 16:16:14,649 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-22 16:16:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:14,650 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-22 16:16:14,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-22 16:16:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:16:14,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:14,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:14,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:16:14,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-22 16:16:14,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:14,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800908361] [2021-11-22 16:16:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:14,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:16:14,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800908361] [2021-11-22 16:16:14,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800908361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888674799] [2021-11-22 16:16:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:14,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:14,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:14,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:16:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:16:14,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:16:15,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:16:15,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888674799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:15,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:16:15,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 16:16:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421628062] [2021-11-22 16:16:15,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:15,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:15,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:15,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:15,059 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:15,113 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-22 16:16:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 16:16:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:15,116 INFO L225 Difference]: With dead ends: 46 [2021-11-22 16:16:15,117 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 16:16:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:15,125 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:15,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 16:16:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-22 16:16:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-22 16:16:15,148 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-22 16:16:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:15,148 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-22 16:16:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-22 16:16:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 16:16:15,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:15,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:15,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:15,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:15,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:15,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-22 16:16:15,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:15,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939374424] [2021-11-22 16:16:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:15,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 16:16:15,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939374424] [2021-11-22 16:16:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939374424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:15,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319374017] [2021-11-22 16:16:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:15,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:15,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:15,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:15,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:16:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:16:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:15,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:16:15,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319374017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:16:15,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:16:15,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 16:16:15,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18451779] [2021-11-22 16:16:15,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:16:15,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:16:15,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:16:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:15,640 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:15,661 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-22 16:16:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:16:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 16:16:15,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:15,666 INFO L225 Difference]: With dead ends: 38 [2021-11-22 16:16:15,666 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 16:16:15,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:16:15,673 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:15,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 16:16:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-22 16:16:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-22 16:16:15,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-22 16:16:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:15,691 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-22 16:16:15,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-22 16:16:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 16:16:15,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:15,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:15,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:15,913 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-22 16:16:15,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:15,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991937708] [2021-11-22 16:16:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:15,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:16,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991937708] [2021-11-22 16:16:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991937708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830059230] [2021-11-22 16:16:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:16,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:16,010 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:16,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:16:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:16:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:16,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:16,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830059230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:16,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:16,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:16:16,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536901252] [2021-11-22 16:16:16,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:16,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:16,303 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:16,339 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-22 16:16:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:16:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 16:16:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:16,345 INFO L225 Difference]: With dead ends: 57 [2021-11-22 16:16:16,345 INFO L226 Difference]: Without dead ends: 34 [2021-11-22 16:16:16,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:16,353 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:16,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-22 16:16:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-22 16:16:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-22 16:16:16,364 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2021-11-22 16:16:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:16,365 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-22 16:16:16,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-22 16:16:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:16:16,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:16,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-22 16:16:16,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:16,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:16,594 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1267081640, now seen corresponding path program 2 times [2021-11-22 16:16:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:16,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044304267] [2021-11-22 16:16:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:16,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-22 16:16:16,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044304267] [2021-11-22 16:16:16,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044304267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071886530] [2021-11-22 16:16:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:16:16,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:16,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:16,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:16:16,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:16:16,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:16:16,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:16,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:16:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071886530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:17,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-22 16:16:17,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475085257] [2021-11-22 16:16:17,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:17,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:16:17,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:16:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:16:17,142 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:17,255 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-22 16:16:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:16:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 16:16:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:17,258 INFO L225 Difference]: With dead ends: 78 [2021-11-22 16:16:17,258 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 16:16:17,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:16:17,260 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:17,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 16:16:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-22 16:16:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-22 16:16:17,296 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 33 [2021-11-22 16:16:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:17,297 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-22 16:16:17,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-22 16:16:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:16:17,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:17,300 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-11-22 16:16:17,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:17,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:17,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1849229898, now seen corresponding path program 3 times [2021-11-22 16:16:17,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702782651] [2021-11-22 16:16:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:17,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 16:16:17,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:17,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702782651] [2021-11-22 16:16:17,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702782651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:17,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643678979] [2021-11-22 16:16:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:16:17,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:17,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:17,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:16:17,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 16:16:17,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:17,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:16:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 16:16:17,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-22 16:16:18,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643678979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:18,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:18,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 16:16:18,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367410811] [2021-11-22 16:16:18,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:18,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:16:18,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:16:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:18,007 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:18,055 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-22 16:16:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:16:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:16:18,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:18,064 INFO L225 Difference]: With dead ends: 69 [2021-11-22 16:16:18,064 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 16:16:18,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:16:18,067 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:18,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:16:18,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 16:16:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 16:16:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-22 16:16:18,080 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2021-11-22 16:16:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:18,080 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-22 16:16:18,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-22 16:16:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:16:18,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:18,082 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:18,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:18,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash -790181948, now seen corresponding path program 4 times [2021-11-22 16:16:18,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568484278] [2021-11-22 16:16:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:18,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 16:16:18,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568484278] [2021-11-22 16:16:18,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568484278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942483984] [2021-11-22 16:16:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:16:18,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:18,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:16:18,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:16:18,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:16:18,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 16:16:18,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 16:16:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942483984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:18,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:18,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-11-22 16:16:18,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889574326] [2021-11-22 16:16:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 16:16:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 16:16:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:16:18,983 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:19,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:19,185 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-22 16:16:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:16:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-22 16:16:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:19,192 INFO L225 Difference]: With dead ends: 120 [2021-11-22 16:16:19,193 INFO L226 Difference]: Without dead ends: 85 [2021-11-22 16:16:19,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:16:19,196 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:19,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 126 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-22 16:16:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-22 16:16:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-22 16:16:19,230 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 57 [2021-11-22 16:16:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:19,231 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-22 16:16:19,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-22 16:16:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 16:16:19,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:19,235 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:19,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 16:16:19,450 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 38809594, now seen corresponding path program 5 times [2021-11-22 16:16:19,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:19,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182232729] [2021-11-22 16:16:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:19,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 16:16:19,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:19,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182232729] [2021-11-22 16:16:19,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182232729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:19,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399615583] [2021-11-22 16:16:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:16:19,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:19,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:19,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:16:20,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-22 16:16:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:16:20,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-22 16:16:20,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-22 16:16:20,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399615583] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:20,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:20,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2021-11-22 16:16:20,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829055805] [2021-11-22 16:16:20,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-22 16:16:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-22 16:16:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:16:20,605 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:20,920 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2021-11-22 16:16:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 16:16:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 16:16:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:20,923 INFO L225 Difference]: With dead ends: 194 [2021-11-22 16:16:20,923 INFO L226 Difference]: Without dead ends: 135 [2021-11-22 16:16:20,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:16:20,925 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:20,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 96 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:16:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-22 16:16:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-11-22 16:16:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-11-22 16:16:20,954 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 83 [2021-11-22 16:16:20,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:20,954 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-11-22 16:16:20,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-11-22 16:16:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-22 16:16:20,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:20,965 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:21,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:21,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:21,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash 713910696, now seen corresponding path program 6 times [2021-11-22 16:16:21,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559390320] [2021-11-22 16:16:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-22 16:16:21,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559390320] [2021-11-22 16:16:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559390320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:21,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656074573] [2021-11-22 16:16:21,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:16:21,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:21,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:21,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:16:22,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 16:16:22,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:16:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-22 16:16:22,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-22 16:16:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656074573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:22,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:22,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2021-11-22 16:16:22,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853190234] [2021-11-22 16:16:22,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 16:16:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 16:16:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:16:22,640 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:22,762 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2021-11-22 16:16:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 16:16:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-22 16:16:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:22,764 INFO L225 Difference]: With dead ends: 256 [2021-11-22 16:16:22,764 INFO L226 Difference]: Without dead ends: 149 [2021-11-22 16:16:22,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:16:22,772 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:22,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-22 16:16:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-11-22 16:16:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-11-22 16:16:22,798 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 133 [2021-11-22 16:16:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:22,798 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-11-22 16:16:22,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:22,799 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-11-22 16:16:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-22 16:16:22,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:22,803 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:22,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:23,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:23,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash -645004454, now seen corresponding path program 7 times [2021-11-22 16:16:23,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:23,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137611931] [2021-11-22 16:16:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:23,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:23,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137611931] [2021-11-22 16:16:23,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137611931] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:23,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865459286] [2021-11-22 16:16:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:16:23,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:23,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:23,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:23,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:16:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:16:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:23,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865459286] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:24,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:24,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-22 16:16:24,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006766234] [2021-11-22 16:16:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:24,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 16:16:24,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 16:16:24,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-22 16:16:24,480 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:24,595 INFO L93 Difference]: Finished difference Result 297 states and 319 transitions. [2021-11-22 16:16:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 16:16:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-22 16:16:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:24,598 INFO L225 Difference]: With dead ends: 297 [2021-11-22 16:16:24,598 INFO L226 Difference]: Without dead ends: 178 [2021-11-22 16:16:24,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-22 16:16:24,600 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:24,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 140 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:16:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-22 16:16:24,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-22 16:16:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-11-22 16:16:24,611 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 147 [2021-11-22 16:16:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:24,612 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-11-22 16:16:24,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-11-22 16:16:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-22 16:16:24,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:24,616 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:24,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:24,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 16:16:24,831 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1078903804, now seen corresponding path program 8 times [2021-11-22 16:16:24,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129820776] [2021-11-22 16:16:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:24,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:25,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:25,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129820776] [2021-11-22 16:16:25,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129820776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:25,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083887264] [2021-11-22 16:16:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:16:25,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:25,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:25,524 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:25,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:16:25,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:16:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 16:16:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:26,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083887264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:27,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-11-22 16:16:27,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346825232] [2021-11-22 16:16:27,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:27,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-22 16:16:27,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-22 16:16:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 16:16:27,972 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:28,218 INFO L93 Difference]: Finished difference Result 357 states and 394 transitions. [2021-11-22 16:16:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-22 16:16:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-22 16:16:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:28,224 INFO L225 Difference]: With dead ends: 357 [2021-11-22 16:16:28,224 INFO L226 Difference]: Without dead ends: 238 [2021-11-22 16:16:28,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 16:16:28,227 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:28,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 163 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-22 16:16:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-22 16:16:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.021097046413502) internal successors, (242), 237 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2021-11-22 16:16:28,243 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 177 [2021-11-22 16:16:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:28,245 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2021-11-22 16:16:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2021-11-22 16:16:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-22 16:16:28,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:28,250 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:28,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:28,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:28,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:28,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash 639536832, now seen corresponding path program 9 times [2021-11-22 16:16:28,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435494897] [2021-11-22 16:16:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:28,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 16:16:30,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435494897] [2021-11-22 16:16:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435494897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:30,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326227094] [2021-11-22 16:16:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:16:30,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:30,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:30,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:16:32,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 16:16:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:16:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2021-11-22 16:16:33,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2021-11-22 16:16:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326227094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:33,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:33,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 13, 13] total 83 [2021-11-22 16:16:33,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66629471] [2021-11-22 16:16:33,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:33,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-22 16:16:33,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:33,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-22 16:16:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2105, Invalid=4701, Unknown=0, NotChecked=0, Total=6806 [2021-11-22 16:16:33,999 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:34,332 INFO L93 Difference]: Finished difference Result 384 states and 404 transitions. [2021-11-22 16:16:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-22 16:16:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-22 16:16:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:34,336 INFO L225 Difference]: With dead ends: 384 [2021-11-22 16:16:34,336 INFO L226 Difference]: Without dead ends: 265 [2021-11-22 16:16:34,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2105, Invalid=4701, Unknown=0, NotChecked=0, Total=6806 [2021-11-22 16:16:34,341 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:34,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 208 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-22 16:16:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-11-22 16:16:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0190114068441065) internal successors, (268), 263 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2021-11-22 16:16:34,355 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 237 [2021-11-22 16:16:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:34,355 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2021-11-22 16:16:34,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2021-11-22 16:16:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-22 16:16:34,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:34,361 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:34,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:34,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 16:16:34,588 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -624080410, now seen corresponding path program 10 times [2021-11-22 16:16:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:34,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752239956] [2021-11-22 16:16:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:34,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 16:16:36,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752239956] [2021-11-22 16:16:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752239956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776904942] [2021-11-22 16:16:36,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:16:36,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:36,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:36,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:36,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:16:36,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:16:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:16:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 16:16:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:16:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 16:16:37,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:16:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 16:16:40,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776904942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:16:40,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:16:40,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 103 [2021-11-22 16:16:40,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584938556] [2021-11-22 16:16:40,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:16:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-22 16:16:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:16:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-22 16:16:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-22 16:16:40,926 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 103 states, 103 states have (on average 2.2135922330097086) internal successors, (228), 103 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:16:41,305 INFO L93 Difference]: Finished difference Result 489 states and 537 transitions. [2021-11-22 16:16:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-22 16:16:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.2135922330097086) internal successors, (228), 103 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-22 16:16:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:16:41,310 INFO L225 Difference]: With dead ends: 489 [2021-11-22 16:16:41,310 INFO L226 Difference]: Without dead ends: 346 [2021-11-22 16:16:41,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 484 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-22 16:16:41,316 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:16:41,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 140 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:16:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-22 16:16:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-11-22 16:16:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.0144927536231885) internal successors, (350), 345 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 350 transitions. [2021-11-22 16:16:41,332 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 350 transitions. Word has length 263 [2021-11-22 16:16:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:16:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 350 transitions. [2021-11-22 16:16:41,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.2135922330097086) internal successors, (228), 103 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:16:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 350 transitions. [2021-11-22 16:16:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-22 16:16:41,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:16:41,341 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:16:41,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:16:41,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 16:16:41,565 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 16:16:41,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:16:41,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1659266644, now seen corresponding path program 11 times [2021-11-22 16:16:41,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:16:41,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857900507] [2021-11-22 16:16:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:16:41,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:16:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:16:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11072 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10588 trivial. 0 not checked. [2021-11-22 16:16:42,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:16:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857900507] [2021-11-22 16:16:42,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857900507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:16:42,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40288454] [2021-11-22 16:16:42,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:16:42,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:16:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:16:42,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:16:42,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fd568ea-3abb-4af4-a791-b7be02bd8509/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process