./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add-1.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_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/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_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/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_34cd2e90-f112-4826-8aaa-2c135f8950e8/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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:39:11,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:39:11,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:39:11,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:39:11,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:39:11,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:39:11,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:39:11,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:39:11,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:39:11,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:39:11,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:39:11,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:39:11,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:39:11,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:39:11,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:39:11,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:39:11,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:39:11,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:39:11,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:39:11,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:39:11,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:39:11,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:39:11,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:39:11,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:39:11,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:39:11,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:39:11,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:39:11,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:39:11,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:39:11,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:39:11,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:39:11,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:39:11,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:39:11,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:39:11,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:39:11,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:39:11,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:39:11,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:39:11,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:39:11,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:39:11,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:39:11,950 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:39:11,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:39:11,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:39:11,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:39:12,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:39:12,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:39:12,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:39:12,008 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:39:12,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:39:12,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:39:12,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:39:12,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:39:12,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:39:12,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:39:12,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:39:12,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:39:12,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:39:12,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:39:12,011 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:39:12,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:39:12,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:39:12,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:39:12,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:39:12,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:39:12,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:39:12,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:39:12,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:39:12,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:39:12,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:39:12,014 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:39:12,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:39:12,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:39:12,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:39:12,016 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_34cd2e90-f112-4826-8aaa-2c135f8950e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-22 14:39:12,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:39:12,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:39:12,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:39:12,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:39:12,307 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:39:12,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-22 14:39:12,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/4b991c49d/85ea35b294b943dd898523a4ef7ffcf5/FLAG920fcf237 [2021-11-22 14:39:12,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:39:12,869 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-22 14:39:12,896 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/4b991c49d/85ea35b294b943dd898523a4ef7ffcf5/FLAG920fcf237 [2021-11-22 14:39:13,208 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/4b991c49d/85ea35b294b943dd898523a4ef7ffcf5 [2021-11-22 14:39:13,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:39:13,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:39:13,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:39:13,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:39:13,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:39:13,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce37b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13, skipping insertion in model container [2021-11-22 14:39:13,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:39:13,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:39:13,455 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_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-22 14:39:13,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:39:13,516 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:39:13,529 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_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-22 14:39:13,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:39:13,562 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:39:13,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13 WrapperNode [2021-11-22 14:39:13,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:39:13,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:39:13,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:39:13,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:39:13,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,603 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-22 14:39:13,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:39:13,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:39:13,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:39:13,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:39:13,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:39:13,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:39:13,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:39:13,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:39:13,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (1/1) ... [2021-11-22 14:39:13,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:39:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:13,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:39:13,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:39:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:39:13,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:39:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:39:13,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:39:13,820 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:39:13,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:39:14,112 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:39:14,118 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:39:14,119 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:39:14,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:14 BoogieIcfgContainer [2021-11-22 14:39:14,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:39:14,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:39:14,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:39:14,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:39:14,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:39:13" (1/3) ... [2021-11-22 14:39:14,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300ecda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:14, skipping insertion in model container [2021-11-22 14:39:14,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:13" (2/3) ... [2021-11-22 14:39:14,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300ecda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:14, skipping insertion in model container [2021-11-22 14:39:14,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:14" (3/3) ... [2021-11-22 14:39:14,130 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-22 14:39:14,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:39:14,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:39:14,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:39:14,244 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 14:39:14,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:39:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:39:14,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:14,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:14,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-22 14:39:14,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:14,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661170565] [2021-11-22 14:39:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:14,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:14,511 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 14:39:14,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:14,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661170565] [2021-11-22 14:39:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661170565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:14,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:14,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:39:14,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91690490] [2021-11-22 14:39:14,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:14,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:39:14,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:39:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:39:14,561 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:14,585 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-22 14:39:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:39:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:39:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:14,597 INFO L225 Difference]: With dead ends: 57 [2021-11-22 14:39:14,597 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:39:14,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:39:14,603 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:14,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:39:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:39:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-22 14:39:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 14:39:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-22 14:39:14,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-22 14:39:14,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:14,639 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-22 14:39:14,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-22 14:39:14,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:39:14,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:14,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:14,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:39:14,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:14,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-22 14:39:14,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:14,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868443658] [2021-11-22 14:39:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:14,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:14,749 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 14:39:14,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868443658] [2021-11-22 14:39:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868443658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:14,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:39:14,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974003070] [2021-11-22 14:39:14,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:14,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:39:14,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:39:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:39:14,754 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:14,892 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-11-22 14:39:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:39:14,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:39:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:14,894 INFO L225 Difference]: With dead ends: 89 [2021-11-22 14:39:14,894 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 14:39:14,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:39:14,897 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:14,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 14:39:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-22 14:39:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-11-22 14:39:14,958 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-11-22 14:39:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:14,959 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-11-22 14:39:14,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-11-22 14:39:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 14:39:14,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:14,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:14,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:39:14,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-11-22 14:39:14,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:14,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073271676] [2021-11-22 14:39:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:14,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:15,152 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 14:39:15,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073271676] [2021-11-22 14:39:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073271676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:15,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:39:15,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790293272] [2021-11-22 14:39:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:15,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:15,156 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 14:39:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:15,384 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-11-22 14:39:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-22 14:39:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:15,387 INFO L225 Difference]: With dead ends: 143 [2021-11-22 14:39:15,387 INFO L226 Difference]: Without dead ends: 105 [2021-11-22 14:39:15,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:15,390 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:15,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-22 14:39:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-11-22 14:39:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-11-22 14:39:15,416 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-11-22 14:39:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:15,417 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-11-22 14:39:15,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states 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 14:39:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-11-22 14:39:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:39:15,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:15,418 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 14:39:15,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:39:15,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-11-22 14:39:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439154247] [2021-11-22 14:39:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:15,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:15,536 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 14:39:15,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439154247] [2021-11-22 14:39:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439154247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:15,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:15,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:39:15,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036336924] [2021-11-22 14:39:15,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:15,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:15,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:15,539 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 14:39:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:15,796 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-11-22 14:39:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:15,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 14:39:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:15,799 INFO L225 Difference]: With dead ends: 169 [2021-11-22 14:39:15,799 INFO L226 Difference]: Without dead ends: 125 [2021-11-22 14:39:15,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:15,801 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:15,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-22 14:39:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-11-22 14:39:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 14:39:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-11-22 14:39:15,814 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-11-22 14:39:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:15,814 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-11-22 14:39:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 14:39:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-11-22 14:39:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 14:39:15,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:15,816 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] [2021-11-22 14:39:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:39:15,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-11-22 14:39:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:15,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191596813] [2021-11-22 14:39:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:15,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:15,919 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 14:39:15,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:15,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191596813] [2021-11-22 14:39:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191596813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:15,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481150199] [2021-11-22 14:39:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:15,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:15,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:15,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:39:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:16,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:39:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:16,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:16,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481150199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:16,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:16,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-22 14:39:16,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305662539] [2021-11-22 14:39:16,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:16,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:16,273 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:16,472 INFO L93 Difference]: Finished difference Result 146 states and 237 transitions. [2021-11-22 14:39:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 14:39:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:16,474 INFO L225 Difference]: With dead ends: 146 [2021-11-22 14:39:16,474 INFO L226 Difference]: Without dead ends: 118 [2021-11-22 14:39:16,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:16,476 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:16,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 73 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-22 14:39:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-11-22 14:39:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.393939393939394) internal successors, (138), 99 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2021-11-22 14:39:16,498 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2021-11-22 14:39:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2021-11-22 14:39:16,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2021-11-22 14:39:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:39:16,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:16,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:16,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:16,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:16,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2021-11-22 14:39:16,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:16,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144522260] [2021-11-22 14:39:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:16,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:16,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144522260] [2021-11-22 14:39:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144522260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084709091] [2021-11-22 14:39:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:16,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:16,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:16,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:39:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:16,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:39:17,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:17,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084709091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:17,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:17,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-11-22 14:39:17,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013739300] [2021-11-22 14:39:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:17,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:17,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:17,112 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 14:39:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:17,221 INFO L93 Difference]: Finished difference Result 199 states and 284 transitions. [2021-11-22 14:39:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:17,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2021-11-22 14:39:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:17,223 INFO L225 Difference]: With dead ends: 199 [2021-11-22 14:39:17,223 INFO L226 Difference]: Without dead ends: 132 [2021-11-22 14:39:17,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:17,225 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:17,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-11-22 14:39:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-22 14:39:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-11-22 14:39:17,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3883495145631068) internal successors, (143), 103 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 14:39:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2021-11-22 14:39:17,237 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 26 [2021-11-22 14:39:17,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:17,237 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2021-11-22 14:39:17,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 14:39:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2021-11-22 14:39:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:39:17,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:17,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:17,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 14:39:17,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:17,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1853130052, now seen corresponding path program 1 times [2021-11-22 14:39:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:17,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106717596] [2021-11-22 14:39:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:17,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:39:17,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:17,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106717596] [2021-11-22 14:39:17,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106717596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:17,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:17,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:39:17,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871528878] [2021-11-22 14:39:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:17,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:17,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:17,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:17,550 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 14:39:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:17,747 INFO L93 Difference]: Finished difference Result 282 states and 387 transitions. [2021-11-22 14:39:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) Word has length 32 [2021-11-22 14:39:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:17,750 INFO L225 Difference]: With dead ends: 282 [2021-11-22 14:39:17,750 INFO L226 Difference]: Without dead ends: 211 [2021-11-22 14:39:17,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:17,751 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 106 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 91 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-22 14:39:17,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 124. [2021-11-22 14:39:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 123 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 14:39:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 171 transitions. [2021-11-22 14:39:17,782 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 171 transitions. Word has length 32 [2021-11-22 14:39:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:17,783 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 171 transitions. [2021-11-22 14:39:17,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 14:39:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 171 transitions. [2021-11-22 14:39:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:39:17,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:17,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:17,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:39:17,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:17,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1751644167, now seen corresponding path program 1 times [2021-11-22 14:39:17,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:17,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055540863] [2021-11-22 14:39:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:17,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:17,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:17,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055540863] [2021-11-22 14:39:17,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055540863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:17,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:17,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:39:17,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147443192] [2021-11-22 14:39:17,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:17,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:39:17,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:39:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:39:17,862 INFO L87 Difference]: Start difference. First operand 124 states and 171 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 14:39:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:17,957 INFO L93 Difference]: Finished difference Result 242 states and 342 transitions. [2021-11-22 14:39:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:39:17,957 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 32 [2021-11-22 14:39:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:17,959 INFO L225 Difference]: With dead ends: 242 [2021-11-22 14:39:17,959 INFO L226 Difference]: Without dead ends: 151 [2021-11-22 14:39:17,960 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 14:39:17,964 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:17,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 59 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-22 14:39:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2021-11-22 14:39:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.4306569343065694) internal successors, (196), 137 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 196 transitions. [2021-11-22 14:39:17,981 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 196 transitions. Word has length 32 [2021-11-22 14:39:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:17,981 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 196 transitions. [2021-11-22 14:39:17,982 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 14:39:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 196 transitions. [2021-11-22 14:39:17,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:39:17,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:17,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:17,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:39:17,993 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash 23363195, now seen corresponding path program 1 times [2021-11-22 14:39:17,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:17,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986692491] [2021-11-22 14:39:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:17,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:18,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:18,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986692491] [2021-11-22 14:39:18,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986692491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:18,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755635866] [2021-11-22 14:39:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:18,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:18,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:18,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:39:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:18,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:18,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755635866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:18,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:18,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2021-11-22 14:39:18,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026541385] [2021-11-22 14:39:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:18,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:18,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:18,360 INFO L87 Difference]: Start difference. First operand 138 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 14:39:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:18,440 INFO L93 Difference]: Finished difference Result 249 states and 354 transitions. [2021-11-22 14:39:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 32 [2021-11-22 14:39:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:18,442 INFO L225 Difference]: With dead ends: 249 [2021-11-22 14:39:18,442 INFO L226 Difference]: Without dead ends: 144 [2021-11-22 14:39:18,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:18,443 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:18,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-22 14:39:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-22 14:39:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-11-22 14:39:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.3597122302158273) internal successors, (189), 139 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 14:39:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2021-11-22 14:39:18,452 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 32 [2021-11-22 14:39:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:18,452 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2021-11-22 14:39:18,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 14:39:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2021-11-22 14:39:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:39:18,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:18,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:18,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:18,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 14:39:18,663 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1733976503, now seen corresponding path program 1 times [2021-11-22 14:39:18,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:18,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601283110] [2021-11-22 14:39:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:18,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:18,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:18,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601283110] [2021-11-22 14:39:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601283110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:18,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330065571] [2021-11-22 14:39:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:18,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:18,791 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:18,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:39:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:39:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:39:19,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:39:19,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330065571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:19,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:19,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-11-22 14:39:19,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702748740] [2021-11-22 14:39:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:19,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:39:19,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:39:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:19,248 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 14:39:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:19,679 INFO L93 Difference]: Finished difference Result 365 states and 519 transitions. [2021-11-22 14:39:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:39:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 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 32 [2021-11-22 14:39:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:19,682 INFO L225 Difference]: With dead ends: 365 [2021-11-22 14:39:19,682 INFO L226 Difference]: Without dead ends: 258 [2021-11-22 14:39:19,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:39:19,683 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 286 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:19,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 98 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 346 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2021-11-22 14:39:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-22 14:39:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 193. [2021-11-22 14:39:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 14:39:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-11-22 14:39:19,711 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 32 [2021-11-22 14:39:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:19,712 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-11-22 14:39:19,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 14:39:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-11-22 14:39:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 14:39:19,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:19,713 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:19,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:19,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:39:19,913 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash 86397356, now seen corresponding path program 2 times [2021-11-22 14:39:19,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:19,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739048182] [2021-11-22 14:39:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:19,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:39:20,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739048182] [2021-11-22 14:39:20,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739048182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:20,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:20,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:39:20,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489457278] [2021-11-22 14:39:20,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:20,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:20,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:20,018 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:20,304 INFO L93 Difference]: Finished difference Result 736 states and 1022 transitions. [2021-11-22 14:39:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-22 14:39:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:20,308 INFO L225 Difference]: With dead ends: 736 [2021-11-22 14:39:20,308 INFO L226 Difference]: Without dead ends: 573 [2021-11-22 14:39:20,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:20,310 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 182 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:20,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 258 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-22 14:39:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 193. [2021-11-22 14:39:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 14:39:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-11-22 14:39:20,321 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 38 [2021-11-22 14:39:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:20,321 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-11-22 14:39:20,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-11-22 14:39:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:20,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:20,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:39:20,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -345904797, now seen corresponding path program 1 times [2021-11-22 14:39:20,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524598598] [2021-11-22 14:39:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:20,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:39:20,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:20,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524598598] [2021-11-22 14:39:20,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524598598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:20,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:20,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:39:20,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036181104] [2021-11-22 14:39:20,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:20,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:20,399 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 14:39:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:20,716 INFO L93 Difference]: Finished difference Result 718 states and 999 transitions. [2021-11-22 14:39:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:20,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 39 [2021-11-22 14:39:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:20,720 INFO L225 Difference]: With dead ends: 718 [2021-11-22 14:39:20,720 INFO L226 Difference]: Without dead ends: 556 [2021-11-22 14:39:20,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:20,722 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 171 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:20,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 283 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:39:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-22 14:39:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 193. [2021-11-22 14:39:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 14:39:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-11-22 14:39:20,736 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 39 [2021-11-22 14:39:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:20,736 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-11-22 14:39:20,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 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 14:39:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-11-22 14:39:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 14:39:20,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:20,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:20,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:39:20,738 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:20,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash 190859729, now seen corresponding path program 1 times [2021-11-22 14:39:20,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:20,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28546816] [2021-11-22 14:39:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:20,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:39:20,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:20,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28546816] [2021-11-22 14:39:20,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28546816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:20,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:20,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:39:20,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370537398] [2021-11-22 14:39:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:20,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:20,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:20,837 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:21,317 INFO L93 Difference]: Finished difference Result 904 states and 1253 transitions. [2021-11-22 14:39:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:39:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 14:39:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:21,323 INFO L225 Difference]: With dead ends: 904 [2021-11-22 14:39:21,323 INFO L226 Difference]: Without dead ends: 742 [2021-11-22 14:39:21,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:39:21,324 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 257 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:21,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 481 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:39:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-22 14:39:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 193. [2021-11-22 14:39:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.4114583333333333) internal successors, (271), 192 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 14:39:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 271 transitions. [2021-11-22 14:39:21,343 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 271 transitions. Word has length 40 [2021-11-22 14:39:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 271 transitions. [2021-11-22 14:39:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 271 transitions. [2021-11-22 14:39:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 14:39:21,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:21,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:21,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:39:21,346 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -83899885, now seen corresponding path program 1 times [2021-11-22 14:39:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543928594] [2021-11-22 14:39:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:21,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:39:21,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:21,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543928594] [2021-11-22 14:39:21,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543928594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:21,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:21,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:39:21,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415111158] [2021-11-22 14:39:21,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:21,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:39:21,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:21,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:39:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:21,472 INFO L87 Difference]: Start difference. First operand 193 states and 271 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:22,088 INFO L93 Difference]: Finished difference Result 948 states and 1307 transitions. [2021-11-22 14:39:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:39:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 14:39:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:22,093 INFO L225 Difference]: With dead ends: 948 [2021-11-22 14:39:22,094 INFO L226 Difference]: Without dead ends: 785 [2021-11-22 14:39:22,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:22,095 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 367 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:22,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 666 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:39:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-22 14:39:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 181. [2021-11-22 14:39:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.4055555555555554) internal successors, (253), 180 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 14:39:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2021-11-22 14:39:22,110 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 40 [2021-11-22 14:39:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2021-11-22 14:39:22,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2021-11-22 14:39:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 14:39:22,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:22,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:22,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:39:22,112 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:22,113 INFO L85 PathProgramCache]: Analyzing trace with hash -175922243, now seen corresponding path program 1 times [2021-11-22 14:39:22,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:22,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098521831] [2021-11-22 14:39:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:22,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:39:22,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098521831] [2021-11-22 14:39:22,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098521831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:22,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:22,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:39:22,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528835996] [2021-11-22 14:39:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:22,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:22,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:22,154 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:22,217 INFO L93 Difference]: Finished difference Result 434 states and 608 transitions. [2021-11-22 14:39:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-22 14:39:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:22,219 INFO L225 Difference]: With dead ends: 434 [2021-11-22 14:39:22,219 INFO L226 Difference]: Without dead ends: 274 [2021-11-22 14:39:22,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:22,221 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 40 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:22,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 223 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:39:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-22 14:39:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 205. [2021-11-22 14:39:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4068627450980393) internal successors, (287), 204 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 14:39:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 287 transitions. [2021-11-22 14:39:22,232 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 287 transitions. Word has length 45 [2021-11-22 14:39:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:22,232 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 287 transitions. [2021-11-22 14:39:22,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:22,233 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 287 transitions. [2021-11-22 14:39:22,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 14:39:22,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:22,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:22,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:39:22,234 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash -543246986, now seen corresponding path program 1 times [2021-11-22 14:39:22,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:22,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435098899] [2021-11-22 14:39:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:22,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:22,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435098899] [2021-11-22 14:39:22,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435098899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:22,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996261234] [2021-11-22 14:39:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:22,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:22,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:22,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:22,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:39:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:39:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:39:22,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:22,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996261234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:22,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:22,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-22 14:39:22,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300291844] [2021-11-22 14:39:22,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:22,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:22,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:22,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:22,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:22,582 INFO L87 Difference]: Start difference. First operand 205 states and 287 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 14:39:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:22,758 INFO L93 Difference]: Finished difference Result 598 states and 839 transitions. [2021-11-22 14:39:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) Word has length 45 [2021-11-22 14:39:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:22,761 INFO L225 Difference]: With dead ends: 598 [2021-11-22 14:39:22,761 INFO L226 Difference]: Without dead ends: 396 [2021-11-22 14:39:22,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:39:22,762 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:22,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 139 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-22 14:39:22,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 351. [2021-11-22 14:39:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.3828571428571428) internal successors, (484), 350 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 14:39:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 484 transitions. [2021-11-22 14:39:22,780 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 484 transitions. Word has length 45 [2021-11-22 14:39:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:22,781 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 484 transitions. [2021-11-22 14:39:22,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 14:39:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 484 transitions. [2021-11-22 14:39:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 14:39:22,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:22,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:22,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:39:23,007 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1776534260, now seen corresponding path program 1 times [2021-11-22 14:39:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096179894] [2021-11-22 14:39:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:23,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:23,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096179894] [2021-11-22 14:39:23,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096179894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899960241] [2021-11-22 14:39:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:23,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:23,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:23,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:39:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 14:39:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:39:23,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:23,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899960241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:23,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:23,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-22 14:39:23,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011912401] [2021-11-22 14:39:23,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:23,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:39:23,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:23,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:39:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:39:23,431 INFO L87 Difference]: Start difference. First operand 351 states and 484 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 14:39:23,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:23,741 INFO L93 Difference]: Finished difference Result 1593 states and 2207 transitions. [2021-11-22 14:39:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:23,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-22 14:39:23,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:23,749 INFO L225 Difference]: With dead ends: 1593 [2021-11-22 14:39:23,750 INFO L226 Difference]: Without dead ends: 1270 [2021-11-22 14:39:23,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:39:23,751 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 205 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:23,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 727 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:39:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-11-22 14:39:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 566. [2021-11-22 14:39:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.3769911504424779) internal successors, (778), 565 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 14:39:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 778 transitions. [2021-11-22 14:39:23,785 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 778 transitions. Word has length 46 [2021-11-22 14:39:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:23,786 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 778 transitions. [2021-11-22 14:39:23,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 14:39:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 778 transitions. [2021-11-22 14:39:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-22 14:39:23,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:23,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:23,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:39:24,016 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1701631379, now seen corresponding path program 1 times [2021-11-22 14:39:24,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:24,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772018886] [2021-11-22 14:39:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:24,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:24,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772018886] [2021-11-22 14:39:24,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772018886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454690397] [2021-11-22 14:39:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:24,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:24,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:24,152 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:24,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:39:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:39:24,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:39:24,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454690397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:24,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:24,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-22 14:39:24,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106199818] [2021-11-22 14:39:24,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:24,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:24,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:24,413 INFO L87 Difference]: Start difference. First operand 566 states and 778 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:24,595 INFO L93 Difference]: Finished difference Result 1254 states and 1735 transitions. [2021-11-22 14:39:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-22 14:39:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:24,602 INFO L225 Difference]: With dead ends: 1254 [2021-11-22 14:39:24,602 INFO L226 Difference]: Without dead ends: 914 [2021-11-22 14:39:24,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:39:24,603 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:24,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 148 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-11-22 14:39:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 836. [2021-11-22 14:39:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 1.377245508982036) internal successors, (1150), 835 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states 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 14:39:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1150 transitions. [2021-11-22 14:39:24,647 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1150 transitions. Word has length 48 [2021-11-22 14:39:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:24,648 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 1150 transitions. [2021-11-22 14:39:24,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1150 transitions. [2021-11-22 14:39:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 14:39:24,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:24,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:24,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:24,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 14:39:24,886 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1042781594, now seen corresponding path program 1 times [2021-11-22 14:39:24,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951257421] [2021-11-22 14:39:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:24,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:24,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:24,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951257421] [2021-11-22 14:39:24,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951257421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:24,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922657639] [2021-11-22 14:39:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:24,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:24,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:25,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:39:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:39:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:39:25,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:25,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922657639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:25,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:25,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2021-11-22 14:39:25,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452687857] [2021-11-22 14:39:25,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:25,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:25,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:39:25,222 INFO L87 Difference]: Start difference. First operand 836 states and 1150 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:25,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:25,462 INFO L93 Difference]: Finished difference Result 2098 states and 2893 transitions. [2021-11-22 14:39:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-22 14:39:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:25,470 INFO L225 Difference]: With dead ends: 2098 [2021-11-22 14:39:25,470 INFO L226 Difference]: Without dead ends: 1269 [2021-11-22 14:39:25,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:25,472 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 109 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:25,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 255 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-22 14:39:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1124. [2021-11-22 14:39:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 1.3401602849510241) internal successors, (1505), 1123 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states 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 14:39:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1505 transitions. [2021-11-22 14:39:25,528 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1505 transitions. Word has length 49 [2021-11-22 14:39:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:25,529 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1505 transitions. [2021-11-22 14:39:25,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1505 transitions. [2021-11-22 14:39:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 14:39:25,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:25,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:25,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:25,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:25,759 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash -727344150, now seen corresponding path program 1 times [2021-11-22 14:39:25,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816654263] [2021-11-22 14:39:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:25,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:25,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:25,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816654263] [2021-11-22 14:39:25,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816654263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109741626] [2021-11-22 14:39:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:25,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:25,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:25,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:39:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:39:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:39:26,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:26,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109741626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:26,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:26,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2021-11-22 14:39:26,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653034311] [2021-11-22 14:39:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:26,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:26,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:39:26,350 INFO L87 Difference]: Start difference. First operand 1124 states and 1505 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:26,778 INFO L93 Difference]: Finished difference Result 2469 states and 3323 transitions. [2021-11-22 14:39:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:39:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-22 14:39:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:26,789 INFO L225 Difference]: With dead ends: 2469 [2021-11-22 14:39:26,789 INFO L226 Difference]: Without dead ends: 1830 [2021-11-22 14:39:26,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:26,791 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 149 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:26,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 263 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:39:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-11-22 14:39:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1637. [2021-11-22 14:39:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 1.3221271393643033) internal successors, (2163), 1636 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states 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 14:39:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2163 transitions. [2021-11-22 14:39:26,889 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2163 transitions. Word has length 50 [2021-11-22 14:39:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:26,890 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 2163 transitions. [2021-11-22 14:39:26,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:26,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2163 transitions. [2021-11-22 14:39:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 14:39:26,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:26,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:26,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:27,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:27,107 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 48257313, now seen corresponding path program 1 times [2021-11-22 14:39:27,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:27,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38801808] [2021-11-22 14:39:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:27,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:39:27,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38801808] [2021-11-22 14:39:27,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38801808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999366106] [2021-11-22 14:39:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:27,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:27,239 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:27,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:39:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:27,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:39:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:39:28,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:39:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999366106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:28,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:28,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2021-11-22 14:39:28,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110017594] [2021-11-22 14:39:28,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:28,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:28,226 INFO L87 Difference]: Start difference. First operand 1637 states and 2163 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 14:39:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:28,552 INFO L93 Difference]: Finished difference Result 2755 states and 3585 transitions. [2021-11-22 14:39:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:39:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 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 14:39:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:28,568 INFO L225 Difference]: With dead ends: 2755 [2021-11-22 14:39:28,568 INFO L226 Difference]: Without dead ends: 2722 [2021-11-22 14:39:28,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:39:28,570 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 94 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:28,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 414 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2021-11-22 14:39:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-11-22 14:39:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1676. [2021-11-22 14:39:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 1.3188059701492538) internal successors, (2209), 1675 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states 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 14:39:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2209 transitions. [2021-11-22 14:39:28,677 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2209 transitions. Word has length 51 [2021-11-22 14:39:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:28,677 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 2209 transitions. [2021-11-22 14:39:28,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 14:39:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2209 transitions. [2021-11-22 14:39:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 14:39:28,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:28,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:28,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:28,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-11-22 14:39:28,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:28,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429792205] [2021-11-22 14:39:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:28,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:39:28,924 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:39:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:39:28,972 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:39:28,972 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 14:39:28,973 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:39:28,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 14:39:28,978 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:28,981 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:39:29,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:39:29 BoogieIcfgContainer [2021-11-22 14:39:29,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:39:29,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:39:29,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:39:29,072 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:39:29,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:14" (3/4) ... [2021-11-22 14:39:29,075 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 14:39:29,075 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:39:29,076 INFO L158 Benchmark]: Toolchain (without parser) took 15863.76ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 72.2MB in the beginning and 103.3MB in the end (delta: -31.1MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,077 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 88.4MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:39:29,077 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.75ms. Allocated memory is still 113.2MB. Free memory was 72.0MB in the beginning and 86.0MB in the end (delta: -14.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,082 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.55ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,082 INFO L158 Benchmark]: Boogie Preprocessor took 25.93ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 82.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,082 INFO L158 Benchmark]: RCFGBuilder took 489.71ms. Allocated memory is still 113.2MB. Free memory was 82.9MB in the beginning and 69.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,083 INFO L158 Benchmark]: TraceAbstraction took 14948.57ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 69.4MB in the beginning and 103.3MB in the end (delta: -33.9MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2021-11-22 14:39:29,083 INFO L158 Benchmark]: Witness Printer took 3.96ms. Allocated memory is still 163.6MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:39:29,089 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory was 88.5MB in the beginning and 88.4MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 349.75ms. Allocated memory is still 113.2MB. Free memory was 72.0MB in the beginning and 86.0MB in the end (delta: -14.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.55ms. Allocated memory is still 113.2MB. Free memory was 86.0MB in the beginning and 84.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.93ms. Allocated memory is still 113.2MB. Free memory was 84.0MB in the beginning and 82.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 489.71ms. Allocated memory is still 113.2MB. Free memory was 82.9MB in the beginning and 69.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14948.57ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 69.4MB in the beginning and 103.3MB in the end (delta: -33.9MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * Witness Printer took 3.96ms. Allocated memory is still 163.6MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116. Possible FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0, r0=0] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0] [L109] COND TRUE i == (unsigned char)1 [L109] r1 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=0, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r0=0, r1=0, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=0, \old(b)=0, \result=3, a=0, a0=0, a1=0, a2=0, a3=0, b=0, b0=0, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=0, r=3, r0=0, r1=0, r2=0, r3=0] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.8s, OverallIterations: 22, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2387 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2387 mSDsluCounter, 4840 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 308 IncrementalHoareTripleChecker+Unchecked, 3108 mSDsCounter, 291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3835 IncrementalHoareTripleChecker+Invalid, 4434 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 291 mSolverCounterUnsat, 1732 mSDtfsCounter, 3835 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 587 GetRequests, 446 SyntacticMatches, 26 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1676occurred in iteration=21, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 21 MinimizatonAttempts, 4479 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1176 NumberOfCodeBlocks, 1176 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1125 ConstructedInterpolants, 27 QuantifiedInterpolants, 6293 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1253 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 32 InterpolantComputations, 20 PerfectInterpolantSequences, 557/611 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-22 14:39:29,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/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_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/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 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:39:31,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:39:31,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:39:31,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:39:31,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:39:31,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:39:31,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:39:31,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:39:31,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:39:31,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:39:31,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:39:31,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:39:31,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:39:31,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:39:31,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:39:31,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:39:31,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:39:31,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:39:31,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:39:31,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:39:31,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:39:31,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:39:31,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:39:31,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:39:31,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:39:31,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:39:31,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:39:31,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:39:31,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:39:31,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:39:31,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:39:31,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:39:31,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:39:31,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:39:31,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:39:31,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:39:31,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:39:31,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:39:31,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:39:31,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:39:31,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:39:31,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-22 14:39:31,745 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:39:31,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:39:31,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:39:31,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:39:31,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:39:31,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:39:31,748 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:39:31,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:39:31,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:39:31,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:39:31,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:39:31,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:39:31,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:39:31,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:39:31,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 14:39:31,750 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 14:39:31,750 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 14:39:31,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:39:31,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:39:31,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:39:31,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:39:31,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:39:31,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:39:31,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:39:31,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:39:31,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:39:31,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:39:31,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:39:31,754 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 14:39:31,754 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 14:39:31,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:39:31,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:39:31,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:39:31,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:39:31,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 14:39:31,755 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dfc9f1e1cbceb1807370dcac22a0449d857eff9a54bdefbc84178983a910e84 [2021-11-22 14:39:32,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:39:32,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:39:32,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:39:32,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:39:32,123 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:39:32,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-22 14:39:32,186 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/8a6c5ebd3/bc4c455939b84dc5bb57a2aa56b07c90/FLAG2c6820379 [2021-11-22 14:39:32,794 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:39:32,794 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i [2021-11-22 14:39:32,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/8a6c5ebd3/bc4c455939b84dc5bb57a2aa56b07c90/FLAG2c6820379 [2021-11-22 14:39:33,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/data/8a6c5ebd3/bc4c455939b84dc5bb57a2aa56b07c90 [2021-11-22 14:39:33,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:39:33,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:39:33,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:39:33,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:39:33,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:39:33,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43cd77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33, skipping insertion in model container [2021-11-22 14:39:33,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:39:33,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:39:33,307 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_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-22 14:39:33,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:39:33,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:39:33,364 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_34cd2e90-f112-4826-8aaa-2c135f8950e8/sv-benchmarks/c/bitvector/byte_add-1.i[1166,1179] [2021-11-22 14:39:33,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:39:33,400 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:39:33,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33 WrapperNode [2021-11-22 14:39:33,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:39:33,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:39:33,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:39:33,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:39:33,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,442 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-22 14:39:33,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:39:33,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:39:33,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:39:33,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:39:33,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:39:33,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:39:33,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:39:33,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:39:33,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (1/1) ... [2021-11-22 14:39:33,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:39:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:33,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:39:33,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:39:33,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:39:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 14:39:33,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:39:33,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:39:33,658 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:39:33,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:39:33,986 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:39:33,995 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:39:34,005 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:39:34,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:34 BoogieIcfgContainer [2021-11-22 14:39:34,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:39:34,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:39:34,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:39:34,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:39:34,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:39:33" (1/3) ... [2021-11-22 14:39:34,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d13ecf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:34, skipping insertion in model container [2021-11-22 14:39:34,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:39:33" (2/3) ... [2021-11-22 14:39:34,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d13ecf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:39:34, skipping insertion in model container [2021-11-22 14:39:34,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:34" (3/3) ... [2021-11-22 14:39:34,019 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2021-11-22 14:39:34,024 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:39:34,025 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:39:34,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:39:34,112 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 14:39:34,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:39:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:39:34,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:34,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:34,145 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-22 14:39:34,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747994704] [2021-11-22 14:39:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:34,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:34,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:34,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 14:39:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-22 14:39:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:34,367 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 14:39:34,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:34,410 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 14:39:34,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747994704] [2021-11-22 14:39:34,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747994704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:34,425 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:34,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 14:39:34,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663061917] [2021-11-22 14:39:34,428 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:34,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:39:34,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:39:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:39:34,465 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:34,484 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-22 14:39:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:39:34,487 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:39:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:34,496 INFO L225 Difference]: With dead ends: 57 [2021-11-22 14:39:34,496 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:39:34,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:39:34,503 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:34,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:39:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:39:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-22 14:39:34,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 14:39:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-22 14:39:34,541 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-22 14:39:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:34,542 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-22 14:39:34,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 14:39:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-22 14:39:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:39:34,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:34,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:34,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:34,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:34,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:34,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:34,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-22 14:39:34,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:34,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92434000] [2021-11-22 14:39:34,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:34,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:34,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:34,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:34,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 14:39:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:34,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:34,872 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 14:39:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:34,922 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 14:39:34,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92434000] [2021-11-22 14:39:34,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92434000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:34,923 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:34,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:39:34,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072640915] [2021-11-22 14:39:34,924 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:34,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:34,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:34,926 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 14:39:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:35,401 INFO L93 Difference]: Finished difference Result 172 states and 301 transitions. [2021-11-22 14:39:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2021-11-22 14:39:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:35,404 INFO L225 Difference]: With dead ends: 172 [2021-11-22 14:39:35,405 INFO L226 Difference]: Without dead ends: 144 [2021-11-22 14:39:35,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:35,407 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:35,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:39:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-22 14:39:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-11-22 14:39:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 111 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 183 transitions. [2021-11-22 14:39:35,448 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 183 transitions. Word has length 12 [2021-11-22 14:39:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:35,450 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 183 transitions. [2021-11-22 14:39:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 14:39:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 183 transitions. [2021-11-22 14:39:35,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:39:35,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:35,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:35,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:35,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:35,665 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-11-22 14:39:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:35,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356968840] [2021-11-22 14:39:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:35,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:35,669 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:35,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 14:39:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:35,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:35,807 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 14:39:35,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:35,880 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 14:39:35,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356968840] [2021-11-22 14:39:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356968840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:35,881 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:35,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-22 14:39:35,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677937686] [2021-11-22 14:39:35,882 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:35,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:39:35,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:39:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:35,884 INFO L87 Difference]: Start difference. First operand 112 states and 183 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:36,622 INFO L93 Difference]: Finished difference Result 345 states and 594 transitions. [2021-11-22 14:39:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:39:36,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 14:39:36,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:36,626 INFO L225 Difference]: With dead ends: 345 [2021-11-22 14:39:36,626 INFO L226 Difference]: Without dead ends: 300 [2021-11-22 14:39:36,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:39:36,629 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 925 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:36,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:39:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-22 14:39:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 225. [2021-11-22 14:39:36,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 224 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 14:39:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 367 transitions. [2021-11-22 14:39:36,670 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 367 transitions. Word has length 14 [2021-11-22 14:39:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:36,671 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 367 transitions. [2021-11-22 14:39:36,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 367 transitions. [2021-11-22 14:39:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:39:36,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:36,674 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] [2021-11-22 14:39:36,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:36,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:36,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:36,886 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2021-11-22 14:39:36,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:36,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618230294] [2021-11-22 14:39:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:36,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:36,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:36,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 14:39:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:36,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:37,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:37,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:37,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618230294] [2021-11-22 14:39:37,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618230294] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:37,112 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:37,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:39:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632155637] [2021-11-22 14:39:37,113 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:37,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:37,115 INFO L87 Difference]: Start difference. First operand 225 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 14:39:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:37,452 INFO L93 Difference]: Finished difference Result 1018 states and 1671 transitions. [2021-11-22 14:39:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:37,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 26 [2021-11-22 14:39:37,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:37,458 INFO L225 Difference]: With dead ends: 1018 [2021-11-22 14:39:37,459 INFO L226 Difference]: Without dead ends: 818 [2021-11-22 14:39:37,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:37,462 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:37,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:39:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-22 14:39:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 467. [2021-11-22 14:39:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.53862660944206) internal successors, (717), 466 states have internal predecessors, (717), 0 states have call successors, (0), 0 states 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 14:39:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 717 transitions. [2021-11-22 14:39:37,519 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 717 transitions. Word has length 26 [2021-11-22 14:39:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:37,520 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 717 transitions. [2021-11-22 14:39:37,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 14:39:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 717 transitions. [2021-11-22 14:39:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:39:37,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:37,523 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, 1] [2021-11-22 14:39:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:37,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:37,734 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1924928046, now seen corresponding path program 1 times [2021-11-22 14:39:37,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14288410] [2021-11-22 14:39:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:37,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:37,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:37,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 14:39:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:39:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:37,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:38,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14288410] [2021-11-22 14:39:38,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14288410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:38,081 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:38,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-22 14:39:38,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054808765] [2021-11-22 14:39:38,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:38,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:39:38,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:38,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:39:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:38,083 INFO L87 Difference]: Start difference. First operand 467 states and 717 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 14:39:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:38,696 INFO L93 Difference]: Finished difference Result 1528 states and 2404 transitions. [2021-11-22 14:39:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:39:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) Word has length 28 [2021-11-22 14:39:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:38,704 INFO L225 Difference]: With dead ends: 1528 [2021-11-22 14:39:38,704 INFO L226 Difference]: Without dead ends: 1086 [2021-11-22 14:39:38,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:39:38,707 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 438 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:38,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 615 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 705 Invalid, 0 Unknown, 123 Unchecked, 0.5s Time] [2021-11-22 14:39:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-22 14:39:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 490. [2021-11-22 14:39:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.4969325153374233) internal successors, (732), 489 states have internal predecessors, (732), 0 states have call successors, (0), 0 states 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 14:39:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 732 transitions. [2021-11-22 14:39:38,738 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 732 transitions. Word has length 28 [2021-11-22 14:39:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 732 transitions. [2021-11-22 14:39:38,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 14:39:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 732 transitions. [2021-11-22 14:39:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:39:38,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:38,741 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, 1] [2021-11-22 14:39:38,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:38,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:38,956 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1604924270, now seen corresponding path program 1 times [2021-11-22 14:39:38,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668868459] [2021-11-22 14:39:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:38,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:38,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:38,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:38,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 14:39:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:39:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:39,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:39,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668868459] [2021-11-22 14:39:39,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668868459] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:39,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:39,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-22 14:39:39,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999909820] [2021-11-22 14:39:39,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:39,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:39:39,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:39:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:39:39,192 INFO L87 Difference]: Start difference. First operand 490 states and 732 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 14:39:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:39,697 INFO L93 Difference]: Finished difference Result 1425 states and 2205 transitions. [2021-11-22 14:39:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:39:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) Word has length 28 [2021-11-22 14:39:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:39,705 INFO L225 Difference]: With dead ends: 1425 [2021-11-22 14:39:39,705 INFO L226 Difference]: Without dead ends: 1197 [2021-11-22 14:39:39,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:39:39,707 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1098 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:39,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1098 Valid, 407 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:39:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-22 14:39:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 954. [2021-11-22 14:39:39,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 1.459601259181532) internal successors, (1391), 953 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states 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 14:39:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1391 transitions. [2021-11-22 14:39:39,746 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1391 transitions. Word has length 28 [2021-11-22 14:39:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:39,746 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1391 transitions. [2021-11-22 14:39:39,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 14:39:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1391 transitions. [2021-11-22 14:39:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 14:39:39,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:39,749 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, 1, 1, 1, 1] [2021-11-22 14:39:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:39,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1970910225, now seen corresponding path program 1 times [2021-11-22 14:39:39,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:39,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374665351] [2021-11-22 14:39:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:39,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:39,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:39,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:39,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 14:39:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:39:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:40,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:40,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374665351] [2021-11-22 14:39:40,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374665351] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:40,119 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:40,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 14:39:40,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583430900] [2021-11-22 14:39:40,120 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:40,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:40,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:40,123 INFO L87 Difference]: Start difference. First operand 954 states and 1391 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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 14:39:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:40,251 INFO L93 Difference]: Finished difference Result 2054 states and 2999 transitions. [2021-11-22 14:39:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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 31 [2021-11-22 14:39:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:40,261 INFO L225 Difference]: With dead ends: 2054 [2021-11-22 14:39:40,261 INFO L226 Difference]: Without dead ends: 1211 [2021-11-22 14:39:40,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:40,264 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:40,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-22 14:39:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1077. [2021-11-22 14:39:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.3986988847583643) internal successors, (1505), 1076 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states 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 14:39:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1505 transitions. [2021-11-22 14:39:40,321 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1505 transitions. Word has length 31 [2021-11-22 14:39:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:40,322 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1505 transitions. [2021-11-22 14:39:40,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 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 14:39:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1505 transitions. [2021-11-22 14:39:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 14:39:40,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:40,327 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, 1, 1, 1, 1] [2021-11-22 14:39:40,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:40,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:40,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2075339537, now seen corresponding path program 1 times [2021-11-22 14:39:40,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:40,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332702604] [2021-11-22 14:39:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:40,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:40,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:40,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:40,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 14:39:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:40,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:40,725 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 14:39:40,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:40,823 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 14:39:40,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332702604] [2021-11-22 14:39:40,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332702604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:40,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:39:40,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-22 14:39:40,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707285875] [2021-11-22 14:39:40,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:40,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:39:40,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:39:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:40,826 INFO L87 Difference]: Start difference. First operand 1077 states and 1505 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:41,626 INFO L93 Difference]: Finished difference Result 2678 states and 3832 transitions. [2021-11-22 14:39:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:39:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 14:39:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:41,638 INFO L225 Difference]: With dead ends: 2678 [2021-11-22 14:39:41,642 INFO L226 Difference]: Without dead ends: 1969 [2021-11-22 14:39:41,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:39:41,647 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 570 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:41,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 349 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:39:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-11-22 14:39:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1518. [2021-11-22 14:39:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 1.3935398813447595) internal successors, (2114), 1517 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states 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 14:39:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2114 transitions. [2021-11-22 14:39:41,703 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2114 transitions. Word has length 31 [2021-11-22 14:39:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:41,705 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 2114 transitions. [2021-11-22 14:39:41,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2114 transitions. [2021-11-22 14:39:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:39:41,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:41,707 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, 1, 1, 1, 1, 1] [2021-11-22 14:39:41,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:41,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:41,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash 876862355, now seen corresponding path program 1 times [2021-11-22 14:39:41,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:41,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658023125] [2021-11-22 14:39:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:41,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:41,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:41,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:41,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 14:39:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:41,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:42,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:42,349 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 14:39:42,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:42,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658023125] [2021-11-22 14:39:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658023125] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:42,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:42,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-22 14:39:42,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672973874] [2021-11-22 14:39:42,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:42,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:42,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:42,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:42,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:42,353 INFO L87 Difference]: Start difference. First operand 1518 states and 2114 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 14:39:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:42,468 INFO L93 Difference]: Finished difference Result 1656 states and 2297 transitions. [2021-11-22 14:39:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) Word has length 32 [2021-11-22 14:39:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:42,479 INFO L225 Difference]: With dead ends: 1656 [2021-11-22 14:39:42,479 INFO L226 Difference]: Without dead ends: 1639 [2021-11-22 14:39:42,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:42,482 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 115 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:42,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 273 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2021-11-22 14:39:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-11-22 14:39:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1521. [2021-11-22 14:39:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.3927631578947368) internal successors, (2117), 1520 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states 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 14:39:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2117 transitions. [2021-11-22 14:39:42,542 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2117 transitions. Word has length 32 [2021-11-22 14:39:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:42,542 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 2117 transitions. [2021-11-22 14:39:42,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 14:39:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2117 transitions. [2021-11-22 14:39:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 14:39:42,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:42,545 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, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:42,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:42,758 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1981630602, now seen corresponding path program 1 times [2021-11-22 14:39:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035547118] [2021-11-22 14:39:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:42,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:42,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:42,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 14:39:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 14:39:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:42,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:42,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035547118] [2021-11-22 14:39:42,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035547118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:42,906 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:42,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 14:39:42,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516409498] [2021-11-22 14:39:42,907 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:42,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:39:42,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:39:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:42,909 INFO L87 Difference]: Start difference. First operand 1521 states and 2117 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 14:39:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:42,966 INFO L93 Difference]: Finished difference Result 2152 states and 2960 transitions. [2021-11-22 14:39:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:39:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 14:39:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:42,978 INFO L225 Difference]: With dead ends: 2152 [2021-11-22 14:39:42,978 INFO L226 Difference]: Without dead ends: 2016 [2021-11-22 14:39:42,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:39:42,980 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:42,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 182 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:39:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-11-22 14:39:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1807. [2021-11-22 14:39:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.3909191583610188) internal successors, (2512), 1806 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states 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 14:39:43,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2512 transitions. [2021-11-22 14:39:43,047 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2512 transitions. Word has length 33 [2021-11-22 14:39:43,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2512 transitions. [2021-11-22 14:39:43,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 14:39:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2512 transitions. [2021-11-22 14:39:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 14:39:43,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:43,050 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, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:43,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:43,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:43,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:43,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2055171256, now seen corresponding path program 1 times [2021-11-22 14:39:43,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176856244] [2021-11-22 14:39:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:43,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:43,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:43,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:43,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 14:39:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:43,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:43,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:43,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176856244] [2021-11-22 14:39:43,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176856244] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:43,472 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:43,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:39:43,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239214551] [2021-11-22 14:39:43,473 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:43,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:43,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:43,475 INFO L87 Difference]: Start difference. First operand 1807 states and 2512 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 14:39:43,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:43,582 INFO L93 Difference]: Finished difference Result 1885 states and 2593 transitions. [2021-11-22 14:39:43,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 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 14:39:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:43,594 INFO L225 Difference]: With dead ends: 1885 [2021-11-22 14:39:43,594 INFO L226 Difference]: Without dead ends: 1880 [2021-11-22 14:39:43,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:43,598 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:43,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-22 14:39:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-11-22 14:39:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1816. [2021-11-22 14:39:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 1.3900826446280992) internal successors, (2523), 1815 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states 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 14:39:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2523 transitions. [2021-11-22 14:39:43,664 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2523 transitions. Word has length 33 [2021-11-22 14:39:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:43,665 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 2523 transitions. [2021-11-22 14:39:43,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 14:39:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2523 transitions. [2021-11-22 14:39:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:43,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:43,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:43,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:43,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:43,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1693819129, now seen corresponding path program 1 times [2021-11-22 14:39:43,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:43,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748798724] [2021-11-22 14:39:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:43,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:43,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:43,880 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:43,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-22 14:39:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:44,096 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:44,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748798724] [2021-11-22 14:39:44,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748798724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:44,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:44,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:39:44,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378719624] [2021-11-22 14:39:44,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:44,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:44,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:44,098 INFO L87 Difference]: Start difference. First operand 1816 states and 2523 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:39:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:44,332 INFO L93 Difference]: Finished difference Result 4369 states and 6149 transitions. [2021-11-22 14:39:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 39 [2021-11-22 14:39:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:44,347 INFO L225 Difference]: With dead ends: 4369 [2021-11-22 14:39:44,347 INFO L226 Difference]: Without dead ends: 2624 [2021-11-22 14:39:44,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:44,351 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:44,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 117 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 181 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2021-11-22 14:39:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-11-22 14:39:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2323. [2021-11-22 14:39:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 1.3617571059431524) internal successors, (3162), 2322 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 14:39:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3162 transitions. [2021-11-22 14:39:44,434 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3162 transitions. Word has length 39 [2021-11-22 14:39:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:44,434 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 3162 transitions. [2021-11-22 14:39:44,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 14:39:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3162 transitions. [2021-11-22 14:39:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:44,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:44,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:44,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:44,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:44,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 884472503, now seen corresponding path program 1 times [2021-11-22 14:39:44,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:44,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995409234] [2021-11-22 14:39:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:44,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:44,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:44,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-22 14:39:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:44,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:44,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995409234] [2021-11-22 14:39:44,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995409234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:44,890 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:44,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:39:44,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719282898] [2021-11-22 14:39:44,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:44,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:44,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:39:44,892 INFO L87 Difference]: Start difference. First operand 2323 states and 3162 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:45,073 INFO L93 Difference]: Finished difference Result 4198 states and 5715 transitions. [2021-11-22 14:39:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:39:45,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 14:39:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:45,088 INFO L225 Difference]: With dead ends: 4198 [2021-11-22 14:39:45,088 INFO L226 Difference]: Without dead ends: 2775 [2021-11-22 14:39:45,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:39:45,092 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:45,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 102 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 133 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-11-22 14:39:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2021-11-22 14:39:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2384. [2021-11-22 14:39:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 1.3453629878304658) internal successors, (3206), 2383 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states 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 14:39:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 3206 transitions. [2021-11-22 14:39:45,209 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 3206 transitions. Word has length 39 [2021-11-22 14:39:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:45,210 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 3206 transitions. [2021-11-22 14:39:45,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 3206 transitions. [2021-11-22 14:39:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:45,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:45,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:45,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:45,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:45,424 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1635487431, now seen corresponding path program 1 times [2021-11-22 14:39:45,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:45,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74102652] [2021-11-22 14:39:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:45,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:45,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:45,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-22 14:39:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:39:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:45,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:45,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74102652] [2021-11-22 14:39:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74102652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:45,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:39:45,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-22 14:39:45,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730228345] [2021-11-22 14:39:45,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:45,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:39:45,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:45,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:39:45,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:39:45,712 INFO L87 Difference]: Start difference. First operand 2384 states and 3206 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 14:39:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:45,985 INFO L93 Difference]: Finished difference Result 4107 states and 5444 transitions. [2021-11-22 14:39:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:39:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 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 39 [2021-11-22 14:39:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:46,001 INFO L225 Difference]: With dead ends: 4107 [2021-11-22 14:39:46,001 INFO L226 Difference]: Without dead ends: 3005 [2021-11-22 14:39:46,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:46,003 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:46,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 163 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 166 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2021-11-22 14:39:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-11-22 14:39:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2529. [2021-11-22 14:39:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 1.339003164556962) internal successors, (3385), 2528 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states 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 14:39:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3385 transitions. [2021-11-22 14:39:46,106 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3385 transitions. Word has length 39 [2021-11-22 14:39:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:46,107 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 3385 transitions. [2021-11-22 14:39:46,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 14:39:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3385 transitions. [2021-11-22 14:39:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:46,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:46,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:46,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-22 14:39:46,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:46,320 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1564530873, now seen corresponding path program 1 times [2021-11-22 14:39:46,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275619693] [2021-11-22 14:39:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:46,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:46,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:46,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-22 14:39:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:39:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:46,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:46,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:46,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275619693] [2021-11-22 14:39:46,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275619693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:39:46,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:39:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 14:39:46,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054843467] [2021-11-22 14:39:46,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:46,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:39:46,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:39:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:46,561 INFO L87 Difference]: Start difference. First operand 2529 states and 3385 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 14:39:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:46,737 INFO L93 Difference]: Finished difference Result 4738 states and 6371 transitions. [2021-11-22 14:39:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:39:46,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 39 [2021-11-22 14:39:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:46,751 INFO L225 Difference]: With dead ends: 4738 [2021-11-22 14:39:46,751 INFO L226 Difference]: Without dead ends: 2635 [2021-11-22 14:39:46,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:39:46,757 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:46,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 74 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 110 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-11-22 14:39:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-11-22 14:39:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2413. [2021-11-22 14:39:46,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 1.3109452736318408) internal successors, (3162), 2412 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 14:39:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 3162 transitions. [2021-11-22 14:39:46,859 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 3162 transitions. Word has length 39 [2021-11-22 14:39:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:46,860 INFO L470 AbstractCegarLoop]: Abstraction has 2413 states and 3162 transitions. [2021-11-22 14:39:46,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 14:39:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 3162 transitions. [2021-11-22 14:39:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 14:39:46,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:46,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:46,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:47,071 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1117502272, now seen corresponding path program 1 times [2021-11-22 14:39:47,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:47,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336242604] [2021-11-22 14:39:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:47,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:47,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:47,075 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:47,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-22 14:39:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:47,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:47,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336242604] [2021-11-22 14:39:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336242604] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:47,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:39:47,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-22 14:39:47,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627349949] [2021-11-22 14:39:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:39:47,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:39:47,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:39:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:47,492 INFO L87 Difference]: Start difference. First operand 2413 states and 3162 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:47,591 INFO L93 Difference]: Finished difference Result 3338 states and 4387 transitions. [2021-11-22 14:39:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:39:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 14:39:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:47,605 INFO L225 Difference]: With dead ends: 3338 [2021-11-22 14:39:47,605 INFO L226 Difference]: Without dead ends: 2611 [2021-11-22 14:39:47,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:47,608 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 79 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:47,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 231 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-11-22 14:39:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-11-22 14:39:47,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2477. [2021-11-22 14:39:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 1.3045234248788369) internal successors, (3230), 2476 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 14:39:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3230 transitions. [2021-11-22 14:39:47,719 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3230 transitions. Word has length 41 [2021-11-22 14:39:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:47,719 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 3230 transitions. [2021-11-22 14:39:47,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3230 transitions. [2021-11-22 14:39:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-22 14:39:47,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:47,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:47,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:47,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:47,933 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 775978409, now seen corresponding path program 1 times [2021-11-22 14:39:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144048989] [2021-11-22 14:39:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:47,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:47,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:47,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-22 14:39:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:39:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:48,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:48,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144048989] [2021-11-22 14:39:48,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144048989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:48,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:39:48,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-22 14:39:48,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772083915] [2021-11-22 14:39:48,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:48,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:39:48,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:39:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:39:48,208 INFO L87 Difference]: Start difference. First operand 2477 states and 3230 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:48,562 INFO L93 Difference]: Finished difference Result 5784 states and 7664 transitions. [2021-11-22 14:39:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:39:48,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-22 14:39:48,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:48,587 INFO L225 Difference]: With dead ends: 5784 [2021-11-22 14:39:48,593 INFO L226 Difference]: Without dead ends: 3802 [2021-11-22 14:39:48,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:39:48,598 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 120 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:48,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 122 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 151 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2021-11-22 14:39:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-11-22 14:39:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3185. [2021-11-22 14:39:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 1.3250628140703518) internal successors, (4219), 3184 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states 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 14:39:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4219 transitions. [2021-11-22 14:39:48,753 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4219 transitions. Word has length 42 [2021-11-22 14:39:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:48,754 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 4219 transitions. [2021-11-22 14:39:48,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4219 transitions. [2021-11-22 14:39:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 14:39:48,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:48,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:48,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:48,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:48,968 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1102041025, now seen corresponding path program 1 times [2021-11-22 14:39:48,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:48,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775433416] [2021-11-22 14:39:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:48,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:48,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:48,970 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:48,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-22 14:39:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:39:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:39:49,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:39:49,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775433416] [2021-11-22 14:39:49,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775433416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:49,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:39:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-22 14:39:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44830744] [2021-11-22 14:39:49,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:49,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:39:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:39:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:39:49,366 INFO L87 Difference]: Start difference. First operand 3185 states and 4219 transitions. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:50,063 INFO L93 Difference]: Finished difference Result 5261 states and 6881 transitions. [2021-11-22 14:39:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:39:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-22 14:39:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:50,070 INFO L225 Difference]: With dead ends: 5261 [2021-11-22 14:39:50,071 INFO L226 Difference]: Without dead ends: 3449 [2021-11-22 14:39:50,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:39:50,074 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 406 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:50,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 244 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 14:39:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-11-22 14:39:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2667. [2021-11-22 14:39:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 1.2936984246061516) internal successors, (3449), 2666 states have internal predecessors, (3449), 0 states have call successors, (0), 0 states 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 14:39:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3449 transitions. [2021-11-22 14:39:50,210 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3449 transitions. Word has length 50 [2021-11-22 14:39:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:50,210 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3449 transitions. [2021-11-22 14:39:50,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3449 transitions. [2021-11-22 14:39:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 14:39:50,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:50,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:50,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:39:50,428 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2021-11-22 14:39:50,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:39:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764935835] [2021-11-22 14:39:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:50,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:39:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:39:50,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:39:50,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-22 14:39:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:50,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 14:39:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:39:52,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:39:54,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:39:54,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764935835] [2021-11-22 14:39:54,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764935835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:54,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:39:54,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-11-22 14:39:54,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783092100] [2021-11-22 14:39:54,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:54,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-22 14:39:54,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:39:54,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-22 14:39:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 14:39:54,773 INFO L87 Difference]: Start difference. First operand 2667 states and 3449 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 14:40:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:02,404 INFO L93 Difference]: Finished difference Result 4733 states and 6181 transitions. [2021-11-22 14:40:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 14:40:02,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:40:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:02,412 INFO L225 Difference]: With dead ends: 4733 [2021-11-22 14:40:02,412 INFO L226 Difference]: Without dead ends: 4360 [2021-11-22 14:40:02,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1360, Invalid=4190, Unknown=0, NotChecked=0, Total=5550 [2021-11-22 14:40:02,416 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 1835 mSDsluCounter, 5634 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 6011 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:02,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 6011 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2400 Invalid, 0 Unknown, 111 Unchecked, 3.1s Time] [2021-11-22 14:40:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2021-11-22 14:40:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3453. [2021-11-22 14:40:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 1.2899768250289687) internal successors, (4453), 3452 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states 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 14:40:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4453 transitions. [2021-11-22 14:40:02,596 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4453 transitions. Word has length 51 [2021-11-22 14:40:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:02,596 INFO L470 AbstractCegarLoop]: Abstraction has 3453 states and 4453 transitions. [2021-11-22 14:40:02,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 38 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 14:40:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4453 transitions. [2021-11-22 14:40:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 14:40:02,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:02,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:02,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:02,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:40:02,819 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 592562209, now seen corresponding path program 1 times [2021-11-22 14:40:02,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:40:02,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708515552] [2021-11-22 14:40:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:02,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:40:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:40:02,822 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:40:02,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-22 14:40:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:02,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:40:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:03,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:40:03,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:40:03,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:40:03,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708515552] [2021-11-22 14:40:03,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708515552] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:03,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:40:03,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-22 14:40:03,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489529280] [2021-11-22 14:40:03,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:40:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:40:03,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:40:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:40:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:40:03,242 INFO L87 Difference]: Start difference. First operand 3453 states and 4453 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:03,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:03,395 INFO L93 Difference]: Finished difference Result 3700 states and 4748 transitions. [2021-11-22 14:40:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:40:03,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 14:40:03,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:03,402 INFO L225 Difference]: With dead ends: 3700 [2021-11-22 14:40:03,402 INFO L226 Difference]: Without dead ends: 3664 [2021-11-22 14:40:03,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:40:03,404 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 161 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:03,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 477 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2021-11-22 14:40:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3664 states. [2021-11-22 14:40:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3664 to 3462. [2021-11-22 14:40:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3461 states have (on average 1.289511701820283) internal successors, (4463), 3461 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states 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 14:40:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 4463 transitions. [2021-11-22 14:40:03,586 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 4463 transitions. Word has length 51 [2021-11-22 14:40:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:03,586 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 4463 transitions. [2021-11-22 14:40:03,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 4463 transitions. [2021-11-22 14:40:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 14:40:03,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:03,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:03,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:03,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:40:03,807 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -536143672, now seen corresponding path program 1 times [2021-11-22 14:40:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:40:03,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223568998] [2021-11-22 14:40:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:03,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:40:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:40:03,810 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:40:03,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-22 14:40:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:40:03,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:04,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:04,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:40:04,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223568998] [2021-11-22 14:40:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223568998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:04,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:40:04,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-22 14:40:04,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329204863] [2021-11-22 14:40:04,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:04,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:40:04,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:40:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:40:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:40:04,142 INFO L87 Difference]: Start difference. First operand 3462 states and 4463 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:04,386 INFO L93 Difference]: Finished difference Result 5923 states and 7635 transitions. [2021-11-22 14:40:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:40:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 14:40:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:04,392 INFO L225 Difference]: With dead ends: 5923 [2021-11-22 14:40:04,392 INFO L226 Difference]: Without dead ends: 2998 [2021-11-22 14:40:04,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:40:04,396 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:04,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 190 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2021-11-22 14:40:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2021-11-22 14:40:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2435. [2021-11-22 14:40:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2434 states have (on average 1.214872637633525) internal successors, (2957), 2434 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states 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 14:40:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 2957 transitions. [2021-11-22 14:40:04,532 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 2957 transitions. Word has length 52 [2021-11-22 14:40:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:04,533 INFO L470 AbstractCegarLoop]: Abstraction has 2435 states and 2957 transitions. [2021-11-22 14:40:04,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 2957 transitions. [2021-11-22 14:40:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 14:40:04,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:04,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:04,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:04,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:40:04,748 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1950719985, now seen corresponding path program 1 times [2021-11-22 14:40:04,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:40:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060336010] [2021-11-22 14:40:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:04,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:40:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:40:04,750 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:40:04,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-22 14:40:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:40:04,792 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:40:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:40:04,885 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-22 14:40:04,885 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 14:40:04,886 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:40:04,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:40:05,102 INFO L732 BasicCegarLoop]: Path program histogram: [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 14:40:05,104 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:40:05,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:40:05 BoogieIcfgContainer [2021-11-22 14:40:05,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:40:05,229 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:40:05,229 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:40:05,229 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:40:05,230 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:39:34" (3/4) ... [2021-11-22 14:40:05,244 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-22 14:40:05,341 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 14:40:05,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:40:05,343 INFO L158 Benchmark]: Toolchain (without parser) took 32265.44ms. Allocated memory was 65.0MB in the beginning and 295.7MB in the end (delta: 230.7MB). Free memory was 45.3MB in the beginning and 174.6MB in the end (delta: -129.3MB). Peak memory consumption was 104.0MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,343 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:40:05,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.80ms. Allocated memory is still 65.0MB. Free memory was 45.0MB in the beginning and 32.6MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.64ms. Allocated memory is still 65.0MB. Free memory was 32.6MB in the beginning and 30.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,344 INFO L158 Benchmark]: Boogie Preprocessor took 28.97ms. Allocated memory is still 65.0MB. Free memory was 30.8MB in the beginning and 29.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,345 INFO L158 Benchmark]: RCFGBuilder took 535.22ms. Allocated memory is still 65.0MB. Free memory was 29.2MB in the beginning and 37.7MB in the end (delta: -8.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,345 INFO L158 Benchmark]: TraceAbstraction took 31218.57ms. Allocated memory was 65.0MB in the beginning and 295.7MB in the end (delta: 230.7MB). Free memory was 37.2MB in the beginning and 181.9MB in the end (delta: -144.7MB). Peak memory consumption was 85.6MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,346 INFO L158 Benchmark]: Witness Printer took 113.30ms. Allocated memory is still 295.7MB. Free memory was 181.9MB in the beginning and 174.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:40:05,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 65.0MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.80ms. Allocated memory is still 65.0MB. Free memory was 45.0MB in the beginning and 32.6MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.64ms. Allocated memory is still 65.0MB. Free memory was 32.6MB in the beginning and 30.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.97ms. Allocated memory is still 65.0MB. Free memory was 30.8MB in the beginning and 29.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 535.22ms. Allocated memory is still 65.0MB. Free memory was 29.2MB in the beginning and 37.7MB in the end (delta: -8.5MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * TraceAbstraction took 31218.57ms. Allocated memory was 65.0MB in the beginning and 295.7MB in the end (delta: 230.7MB). Free memory was 37.2MB in the beginning and 181.9MB in the end (delta: -144.7MB). Peak memory consumption was 85.6MB. Max. memory is 16.1GB. * Witness Printer took 113.30ms. Allocated memory is still 295.7MB. Free memory was 181.9MB in the beginning and 174.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 25]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L124] unsigned int a, b, r; [L126] a = __VERIFIER_nondet_uint() [L127] b = __VERIFIER_nondet_uint() [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, na=1, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L89] COND TRUE i < nb VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=0] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=0, na=1, nb=1, partial_sum=255] [L95] COND TRUE partial_sum > ((unsigned char)254) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=0, na=1, nb=1, partial_sum=255, r0=-1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=1, i=1, na=1, nb=1, partial_sum=255, r0=-1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L83] COND FALSE !(i < na) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L89] COND FALSE !(i < nb) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L95] COND FALSE !(partial_sum > ((unsigned char)254)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=1, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L104] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1] [L110] COND TRUE i == (unsigned char)2 [L110] r2 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=2, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L107] COND TRUE i < (unsigned char)4 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L108] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L109] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L110] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0] [L111] COND TRUE i == (unsigned char)3 [L111] r3 = (unsigned char)0 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=3, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L113] i = i + (unsigned char)1 VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=0, \old(b)=255, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r0=-1, r1=1, r2=0, r3=0] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=0, \old(b)=255, \result=511, a=0, a0=0, a1=0, a2=0, a3=0, b=255, b0=-1, b1=0, b2=0, b3=0, carry=0, i=4, na=1, nb=1, partial_sum=1, r=511, r0=-1, r1=1, r2=0, r3=0] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 31.0s, OverallIterations: 22, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6547 SdHoareTripleChecker+Valid, 7.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6547 mSDsluCounter, 10308 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1025 IncrementalHoareTripleChecker+Unchecked, 8613 mSDsCounter, 872 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7281 IncrementalHoareTripleChecker+Invalid, 9178 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 872 mSolverCounterUnsat, 1695 mSDtfsCounter, 7281 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1492 GetRequests, 1258 SyntacticMatches, 9 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3462occurred in iteration=20, InterpolantAutomatonStates: 193, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 21 MinimizatonAttempts, 6868 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 777 NumberOfCodeBlocks, 777 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1404 ConstructedInterpolants, 124 QuantifiedInterpolants, 9713 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1566 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 42 InterpolantComputations, 27 PerfectInterpolantSequences, 135/228 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-22 14:40:05,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34cd2e90-f112-4826-8aaa-2c135f8950e8/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE