./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd2.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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/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 a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:15:33,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:15:33,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:15:33,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:15:33,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:15:33,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:15:33,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:15:33,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:15:33,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:15:33,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:15:33,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:15:33,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:15:33,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:15:33,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:15:33,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:15:33,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:15:33,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:15:33,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:15:33,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:15:33,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:15:33,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:15:33,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:15:33,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:15:33,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:15:33,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:15:33,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:15:33,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:15:33,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:15:33,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:15:33,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:15:33,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:15:33,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:15:33,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:15:33,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:15:33,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:15:33,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:15:33,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:15:33,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:15:33,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:15:33,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:15:33,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:15:33,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:15:33,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:15:33,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:15:33,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:15:33,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:15:33,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:15:33,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:15:33,707 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:15:33,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:15:33,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:15:33,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:15:33,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:15:33,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:15:33,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:15:33,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:15:33,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:15:33,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:15:33,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:15:33,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:15:33,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:15:33,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:15:33,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:15:33,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:15:33,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:15:33,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:15:33,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:15:33,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:15:33,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:15:33,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:15:33,713 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:15:33,714 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:15:33,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:15:33,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:15:33,715 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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 [2021-11-22 15:15:33,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:15:34,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:15:34,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:15:34,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:15:34,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:15:34,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/bAnd2.i [2021-11-22 15:15:34,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/data/87cd71e64/03b2fc4aed714f65b1dca3341d4528fd/FLAG506630d5b [2021-11-22 15:15:34,569 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:15:34,570 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/sv-benchmarks/c/array-crafted/bAnd2.i [2021-11-22 15:15:34,576 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/data/87cd71e64/03b2fc4aed714f65b1dca3341d4528fd/FLAG506630d5b [2021-11-22 15:15:34,942 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/data/87cd71e64/03b2fc4aed714f65b1dca3341d4528fd [2021-11-22 15:15:34,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:15:34,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:15:34,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:15:34,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:15:34,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:15:34,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:15:34" (1/1) ... [2021-11-22 15:15:34,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6927d17a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:34, skipping insertion in model container [2021-11-22 15:15:34,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:15:34" (1/1) ... [2021-11-22 15:15:34,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:15:34,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:15:35,170 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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2021-11-22 15:15:35,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:15:35,182 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:15:35,203 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_df33f6ee-be68-4c16-ab53-edb294e2b1fb/sv-benchmarks/c/array-crafted/bAnd2.i[1296,1309] [2021-11-22 15:15:35,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:15:35,221 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:15:35,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35 WrapperNode [2021-11-22 15:15:35,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:15:35,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:15:35,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:15:35,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:15:35,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,285 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 124 [2021-11-22 15:15:35,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:15:35,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:15:35,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:15:35,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:15:35,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:15:35,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:15:35,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:15:35,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:15:35,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (1/1) ... [2021-11-22 15:15:35,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:15:35,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:35,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:15:35,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:15:35,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:15:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:15:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:15:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:15:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:15:35,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:15:35,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:15:35,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:15:35,519 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:15:35,521 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:15:35,714 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:15:35,721 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:15:35,721 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-22 15:15:35,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:15:35 BoogieIcfgContainer [2021-11-22 15:15:35,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:15:35,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:15:35,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:15:35,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:15:35,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:15:34" (1/3) ... [2021-11-22 15:15:35,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16287f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:15:35, skipping insertion in model container [2021-11-22 15:15:35,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:15:35" (2/3) ... [2021-11-22 15:15:35,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16287f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:15:35, skipping insertion in model container [2021-11-22 15:15:35,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:15:35" (3/3) ... [2021-11-22 15:15:35,733 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2021-11-22 15:15:35,739 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:15:35,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:15:35,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:15:35,814 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 15:15:35,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:15:35,829 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 15:15:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 15:15:35,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:35,836 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 15:15:35,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:35,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-22 15:15:35,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:35,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274612321] [2021-11-22 15:15:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:35,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:36,018 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 15:15:36,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:36,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274612321] [2021-11-22 15:15:36,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274612321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:15:36,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:15:36,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 15:15:36,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361443079] [2021-11-22 15:15:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:15:36,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:15:36,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:15:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 15:15:36,067 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 15:15:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:36,116 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-22 15:15:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:15:36,119 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 15:15:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:36,129 INFO L225 Difference]: With dead ends: 52 [2021-11-22 15:15:36,129 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:15:36,139 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 15:15:36,143 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 15:15:36,145 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 15:15:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:15:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-22 15:15:36,173 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 15:15:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-22 15:15:36,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-22 15:15:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:36,176 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-22 15:15:36,176 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 15:15:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-22 15:15:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:15:36,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:36,178 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 15:15:36,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:15:36,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:36,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:36,179 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-22 15:15:36,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670432943] [2021-11-22 15:15:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:36,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:36,240 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 15:15:36,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670432943] [2021-11-22 15:15:36,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670432943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783752724] [2021-11-22 15:15:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:36,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:36,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:36,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:15:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:15:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:36,392 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 15:15:36,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:15:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783752724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:15:36,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:15:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 15:15:36,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133491875] [2021-11-22 15:15:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:15:36,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:15:36,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:15:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:15:36,411 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 15:15:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:36,441 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-22 15:15:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:15:36,442 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 15:15:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:36,443 INFO L225 Difference]: With dead ends: 46 [2021-11-22 15:15:36,443 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 15:15:36,444 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 15:15:36,446 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 15:15:36,447 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 15:15:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 15:15:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-22 15:15:36,452 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 15:15:36,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-22 15:15:36,454 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-22 15:15:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:36,454 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-22 15:15:36,455 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 15:15:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-22 15:15:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 15:15:36,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:36,456 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 15:15:36,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:36,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:36,682 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-22 15:15:36,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244849117] [2021-11-22 15:15:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:36,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:36,770 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 15:15:36,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244849117] [2021-11-22 15:15:36,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244849117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804503244] [2021-11-22 15:15:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:36,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:36,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:36,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:36,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:15:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 15:15:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:36,902 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 15:15:36,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 15:15:36,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804503244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:15:36,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 15:15:36,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-22 15:15:36,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137822998] [2021-11-22 15:15:36,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:15:36,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 15:15:36,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:36,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 15:15:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 15:15:36,905 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 15:15:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:36,918 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-22 15:15:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 15:15:36,918 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 15:15:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:36,919 INFO L225 Difference]: With dead ends: 38 [2021-11-22 15:15:36,920 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 15:15:36,920 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 15:15:36,922 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 15:15:36,922 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 15:15:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 15:15:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-22 15:15:36,927 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 15:15:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-22 15:15:36,928 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-22 15:15:36,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:36,929 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-22 15:15:36,929 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 15:15:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-22 15:15:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 15:15:36,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:36,930 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 15:15:36,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:37,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:37,146 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:37,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:37,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-22 15:15:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:37,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130230019] [2021-11-22 15:15:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:37,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:37,186 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 15:15:37,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130230019] [2021-11-22 15:15:37,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130230019] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:37,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321795724] [2021-11-22 15:15:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:37,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:37,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:37,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:15:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:15:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:37,399 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 15:15:37,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:37,465 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 15:15:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321795724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:37,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:37,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:15:37,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079554004] [2021-11-22 15:15:37,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:37,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:15:37,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:15:37,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:15:37,468 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 15:15:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:37,496 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-22 15:15:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:15:37,497 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 15:15:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:37,498 INFO L225 Difference]: With dead ends: 57 [2021-11-22 15:15:37,498 INFO L226 Difference]: Without dead ends: 34 [2021-11-22 15:15:37,499 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 15:15:37,500 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 15:15:37,500 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 15:15:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-22 15:15:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-22 15:15:37,505 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 15:15:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-22 15:15:37,506 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2021-11-22 15:15:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-22 15:15:37,507 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 15:15:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-22 15:15:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 15:15:37,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:37,508 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 15:15:37,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:37,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:37,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1267081640, now seen corresponding path program 2 times [2021-11-22 15:15:37,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170952655] [2021-11-22 15:15:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:37,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:37,803 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 15:15:37,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:37,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170952655] [2021-11-22 15:15:37,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170952655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:37,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103238456] [2021-11-22 15:15:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:15:37,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:37,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:37,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:15:37,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:15:37,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:37,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:15:37,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:37,962 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 15:15:37,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:38,094 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 15:15:38,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103238456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:38,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:38,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-22 15:15:38,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923595064] [2021-11-22 15:15:38,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:38,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 15:15:38,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 15:15:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-22 15:15:38,097 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 15:15:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:38,175 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-22 15:15:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 15:15:38,175 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 15:15:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:38,176 INFO L225 Difference]: With dead ends: 78 [2021-11-22 15:15:38,177 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 15:15:38,177 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 15:15:38,178 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 15:15:38,179 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 15:15:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 15:15:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-22 15:15:38,185 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 15:15:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-22 15:15:38,186 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 33 [2021-11-22 15:15:38,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:38,186 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-22 15:15:38,187 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 15:15:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-22 15:15:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 15:15:38,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:38,189 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 15:15:38,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-22 15:15:38,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:38,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1849229898, now seen corresponding path program 3 times [2021-11-22 15:15:38,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:38,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739952069] [2021-11-22 15:15:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:38,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:38,534 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 15:15:38,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:38,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739952069] [2021-11-22 15:15:38,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739952069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:38,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615150115] [2021-11-22 15:15:38,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:15:38,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:38,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:38,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:38,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 15:15:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 15:15:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:38,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 15:15:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:38,710 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 15:15:38,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:38,800 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 15:15:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615150115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:38,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 15:15:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139807414] [2021-11-22 15:15:38,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:38,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 15:15:38,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 15:15:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-22 15:15:38,802 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 15:15:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:38,840 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-22 15:15:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 15:15:38,846 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 15:15:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:38,851 INFO L225 Difference]: With dead ends: 69 [2021-11-22 15:15:38,851 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 15:15:38,851 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 15:15:38,854 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 15:15:38,855 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 15:15:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 15:15:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 15:15:38,872 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 15:15:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-22 15:15:38,878 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2021-11-22 15:15:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:38,879 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-22 15:15:38,879 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 15:15:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-22 15:15:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 15:15:38,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:38,883 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 15:15:38,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:39,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:39,098 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -790181948, now seen corresponding path program 4 times [2021-11-22 15:15:39,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207167622] [2021-11-22 15:15:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:39,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:39,178 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 15:15:39,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207167622] [2021-11-22 15:15:39,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207167622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:39,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411937093] [2021-11-22 15:15:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:15:39,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:39,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:39,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 15:15:39,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:15:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 15:15:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:39,347 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 15:15:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:39,440 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 15:15:39,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411937093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:39,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:39,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-22 15:15:39,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152343054] [2021-11-22 15:15:39,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:39,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:15:39,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:39,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:15:39,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:15:39,445 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 15:15:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:39,519 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-11-22 15:15:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 15:15:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 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 15:15:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:39,523 INFO L225 Difference]: With dead ends: 111 [2021-11-22 15:15:39,523 INFO L226 Difference]: Without dead ends: 82 [2021-11-22 15:15:39,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:15:39,527 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:39,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-22 15:15:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-22 15:15:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 15:15:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-22 15:15:39,545 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 57 [2021-11-22 15:15:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:39,546 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-22 15:15:39,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 15:15:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-22 15:15:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 15:15:39,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:39,548 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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 15:15:39,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:39,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 15:15:39,749 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash 459280572, now seen corresponding path program 5 times [2021-11-22 15:15:39,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:39,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403798030] [2021-11-22 15:15:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:39,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-22 15:15:39,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403798030] [2021-11-22 15:15:39,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403798030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286642646] [2021-11-22 15:15:39,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:15:39,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:39,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:39,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:39,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 15:15:40,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-22 15:15:40,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 15:15:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-22 15:15:40,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-22 15:15:40,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286642646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:40,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:40,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-11-22 15:15:40,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940171609] [2021-11-22 15:15:40,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:40,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 15:15:40,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 15:15:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:15:40,564 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 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 15:15:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:40,775 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2021-11-22 15:15:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 15:15:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 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 81 [2021-11-22 15:15:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:40,777 INFO L225 Difference]: With dead ends: 192 [2021-11-22 15:15:40,778 INFO L226 Difference]: Without dead ends: 133 [2021-11-22 15:15:40,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-11-22 15:15:40,780 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:40,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 131 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:15:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-22 15:15:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-11-22 15:15:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-11-22 15:15:40,809 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 81 [2021-11-22 15:15:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-11-22 15:15:40,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 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 15:15:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-11-22 15:15:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-22 15:15:40,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:40,818 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:40,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-22 15:15:41,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:41,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1420700182, now seen corresponding path program 6 times [2021-11-22 15:15:41,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:41,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791235864] [2021-11-22 15:15:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:41,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-22 15:15:41,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:41,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791235864] [2021-11-22 15:15:41,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791235864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:41,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184967214] [2021-11-22 15:15:41,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 15:15:41,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:41,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 15:15:41,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-22 15:15:41,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:15:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2021-11-22 15:15:41,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2021-11-22 15:15:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184967214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:41,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:41,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2021-11-22 15:15:41,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713535555] [2021-11-22 15:15:41,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:41,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 15:15:41,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 15:15:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:15:41,992 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:42,065 INFO L93 Difference]: Finished difference Result 254 states and 268 transitions. [2021-11-22 15:15:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 15:15:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-22 15:15:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:42,067 INFO L225 Difference]: With dead ends: 254 [2021-11-22 15:15:42,067 INFO L226 Difference]: Without dead ends: 147 [2021-11-22 15:15:42,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-11-22 15:15:42,069 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:42,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-22 15:15:42,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-11-22 15:15:42,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2021-11-22 15:15:42,078 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 131 [2021-11-22 15:15:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:42,078 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2021-11-22 15:15:42,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2021-11-22 15:15:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-22 15:15:42,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:42,081 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:15:42,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:42,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:42,306 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1857475612, now seen corresponding path program 7 times [2021-11-22 15:15:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103321065] [2021-11-22 15:15:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:42,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:42,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:42,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103321065] [2021-11-22 15:15:42,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103321065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:42,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688202166] [2021-11-22 15:15:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 15:15:42,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:42,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:42,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:42,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 15:15:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 15:15:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:42,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688202166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:43,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-11-22 15:15:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228717523] [2021-11-22 15:15:43,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 15:15:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 15:15:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:15:43,341 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:43,438 INFO L93 Difference]: Finished difference Result 293 states and 314 transitions. [2021-11-22 15:15:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 15:15:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-22 15:15:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:43,440 INFO L225 Difference]: With dead ends: 293 [2021-11-22 15:15:43,441 INFO L226 Difference]: Without dead ends: 174 [2021-11-22 15:15:43,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-22 15:15:43,442 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:43,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 117 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-22 15:15:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-22 15:15:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2021-11-22 15:15:43,452 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 145 [2021-11-22 15:15:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:43,452 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2021-11-22 15:15:43,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2021-11-22 15:15:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-22 15:15:43,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:43,455 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 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 15:15:43,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:43,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 15:15:43,674 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1542409984, now seen corresponding path program 8 times [2021-11-22 15:15:43,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644146310] [2021-11-22 15:15:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:43,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:44,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:44,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644146310] [2021-11-22 15:15:44,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644146310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:44,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850158087] [2021-11-22 15:15:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:15:44,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:44,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:44,116 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 15:15:44,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:15:44,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:44,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 15:15:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:44,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850158087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:45,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:45,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2021-11-22 15:15:45,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229166770] [2021-11-22 15:15:45,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:45,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-22 15:15:45,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-22 15:15:45,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 15:15:45,712 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 15:15:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:45,902 INFO L93 Difference]: Finished difference Result 349 states and 384 transitions. [2021-11-22 15:15:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-22 15:15:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 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 173 [2021-11-22 15:15:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:45,904 INFO L225 Difference]: With dead ends: 349 [2021-11-22 15:15:45,904 INFO L226 Difference]: Without dead ends: 230 [2021-11-22 15:15:45,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-22 15:15:45,907 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:45,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 140 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:15:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-22 15:15:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-11-22 15:15:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.0218340611353711) internal successors, (234), 229 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 15:15:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 234 transitions. [2021-11-22 15:15:45,918 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 234 transitions. Word has length 173 [2021-11-22 15:15:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 234 transitions. [2021-11-22 15:15:45,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3508771929824563) internal successors, (134), 57 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 15:15:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 234 transitions. [2021-11-22 15:15:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-22 15:15:45,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:45,922 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 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 15:15:45,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:46,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-22 15:15:46,137 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1936799032, now seen corresponding path program 9 times [2021-11-22 15:15:46,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:46,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517634152] [2021-11-22 15:15:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:46,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-22 15:15:47,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517634152] [2021-11-22 15:15:47,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517634152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:47,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312708853] [2021-11-22 15:15:47,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:15:47,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:47,586 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:47,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 15:15:49,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 15:15:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:49,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 15:15:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2021-11-22 15:15:49,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3604 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2021-11-22 15:15:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312708853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:50,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:50,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 13, 13] total 79 [2021-11-22 15:15:50,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124927343] [2021-11-22 15:15:50,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:50,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-22 15:15:50,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-22 15:15:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1871, Invalid=4291, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 15:15:50,426 INFO L87 Difference]: Start difference. First operand 230 states and 234 transitions. Second operand has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 15:15:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:50,663 INFO L93 Difference]: Finished difference Result 376 states and 396 transitions. [2021-11-22 15:15:50,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-22 15:15:50,663 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-22 15:15:50,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:50,666 INFO L225 Difference]: With dead ends: 376 [2021-11-22 15:15:50,666 INFO L226 Difference]: Without dead ends: 257 [2021-11-22 15:15:50,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1871, Invalid=4291, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 15:15:50,670 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:50,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 186 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 15:15:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-22 15:15:50,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-11-22 15:15:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.0196078431372548) internal successors, (260), 255 states have internal predecessors, (260), 0 states have call successors, (0), 0 states 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 15:15:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 260 transitions. [2021-11-22 15:15:50,681 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 260 transitions. Word has length 229 [2021-11-22 15:15:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:50,683 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 260 transitions. [2021-11-22 15:15:50,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.4177215189873418) internal successors, (191), 79 states have internal predecessors, (191), 0 states have call successors, (0), 0 states 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 15:15:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 260 transitions. [2021-11-22 15:15:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-22 15:15:50,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:50,687 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 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 15:15:50,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:50,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 15:15:50,906 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -541914130, now seen corresponding path program 10 times [2021-11-22 15:15:50,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154788290] [2021-11-22 15:15:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:50,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:15:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:15:52,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:15:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154788290] [2021-11-22 15:15:52,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154788290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:15:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832810197] [2021-11-22 15:15:52,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 15:15:52,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:15:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:15:52,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:15:52,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 15:15:52,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 15:15:52,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:15:52,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-22 15:15:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:15:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:15:53,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:15:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:15:56,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832810197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:15:56,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:15:56,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2021-11-22 15:15:56,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505556094] [2021-11-22 15:15:56,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:15:56,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-22 15:15:56,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:15:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-22 15:15:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 15:15:56,556 INFO L87 Difference]: Start difference. First operand 256 states and 260 transitions. Second operand has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 15:15:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:15:56,972 INFO L93 Difference]: Finished difference Result 513 states and 577 transitions. [2021-11-22 15:15:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-22 15:15:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 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 255 [2021-11-22 15:15:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:15:56,977 INFO L225 Difference]: With dead ends: 513 [2021-11-22 15:15:56,977 INFO L226 Difference]: Without dead ends: 370 [2021-11-22 15:15:56,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 15:15:56,982 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 112 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 15:15:56,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 163 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 15:15:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-22 15:15:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-22 15:15:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.013550135501355) internal successors, (374), 369 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 15:15:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 374 transitions. [2021-11-22 15:15:56,996 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 374 transitions. Word has length 255 [2021-11-22 15:15:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:15:56,997 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 374 transitions. [2021-11-22 15:15:56,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states 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 15:15:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 374 transitions. [2021-11-22 15:15:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-22 15:15:57,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:15:57,004 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 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 15:15:57,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 15:15:57,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 15:15:57,218 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:15:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:15:57,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1296472516, now seen corresponding path program 11 times [2021-11-22 15:15:57,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:15:57,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527874715] [2021-11-22 15:15:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:15:57,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:15:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:16:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 13616 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-22 15:16:01,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:16:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527874715] [2021-11-22 15:16:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527874715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:16:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555692317] [2021-11-22 15:16:01,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 15:16:01,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:16:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:16:01,929 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:16:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df33f6ee-be68-4c16-ab53-edb294e2b1fb/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process