./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa --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 f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:52:50,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:52:50,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:52:50,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:52:50,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:52:50,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:52:50,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:52:50,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:52:50,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:52:50,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:52:50,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:52:50,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:52:50,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:52:50,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:52:50,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:52:50,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:52:50,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:52:50,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:52:50,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:52:50,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:52:50,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:52:50,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:52:50,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:52:50,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:52:50,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:52:50,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:52:50,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:52:50,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:52:50,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:52:50,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:52:50,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:52:50,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:52:50,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:52:50,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:52:50,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:52:50,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:52:50,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:52:50,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:52:50,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:52:50,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:52:50,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:52:50,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:52:50,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:52:50,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:52:50,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:52:50,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:52:50,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:52:50,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:52:50,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:52:50,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:52:50,999 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:52:50,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:52:50,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:52:50,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:52:50,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:52:50,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:52:51,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:52:51,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:52:51,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:52:51,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:52:51,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:52:51,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:52:51,002 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_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2021-12-06 22:52:51,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:52:51,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:52:51,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:52:51,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:52:51,209 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:52:51,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-06 22:52:51,264 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/data/6ced6bdac/4cb99e68bb324e2ead7bc19e6ba04a23/FLAGb1eb4f8ec [2021-12-06 22:52:51,822 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:52:51,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2021-12-06 22:52:51,845 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/data/6ced6bdac/4cb99e68bb324e2ead7bc19e6ba04a23/FLAGb1eb4f8ec [2021-12-06 22:52:52,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/data/6ced6bdac/4cb99e68bb324e2ead7bc19e6ba04a23 [2021-12-06 22:52:52,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:52:52,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:52:52,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:52:52,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:52:52,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:52:52,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:52:52" (1/1) ... [2021-12-06 22:52:52,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67430d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:52, skipping insertion in model container [2021-12-06 22:52:52,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:52:52" (1/1) ... [2021-12-06 22:52:52,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:52:52,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:52:52,808 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_94be86e7-7a40-4608-948a-a9b83609f101/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2021-12-06 22:52:53,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:52:53,068 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:52:53,122 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_94be86e7-7a40-4608-948a-a9b83609f101/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2021-12-06 22:52:53,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:52:53,255 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:52:53,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53 WrapperNode [2021-12-06 22:52:53,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:52:53,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:52:53,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:52:53,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:52:53,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,420 INFO L137 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2021-12-06 22:52:53,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:52:53,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:52:53,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:52:53,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:52:53,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:52:53,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:52:53,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:52:53,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:52:53,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (1/1) ... [2021-12-06 22:52:53,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:52:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:53,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:52:53,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:52:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 22:52:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 22:52:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 22:52:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:52:53,663 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-06 22:52:53,663 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:52:53,664 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-06 22:52:53,664 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 22:52:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-06 22:52:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2021-12-06 22:52:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-06 22:52:53,665 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 22:52:53,665 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-06 22:52:53,666 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-06 22:52:53,666 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-06 22:52:53,667 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-06 22:52:53,667 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-06 22:52:53,667 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-06 22:52:53,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-06 22:52:53,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:52:53,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:52:54,052 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:52:54,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:52:54,202 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:52:54,217 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-06 22:52:54,217 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-06 22:52:54,293 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:52:54,303 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-06 22:52:54,303 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-06 22:52:54,610 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:52:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-06 22:52:54,630 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-06 22:52:54,750 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:52:54,753 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:52:54,758 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2021-12-06 22:53:41,115 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2021-12-06 22:53:41,128 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:53:41,137 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:53:41,137 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 22:53:41,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:53:41 BoogieIcfgContainer [2021-12-06 22:53:41,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:53:41,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:53:41,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:53:41,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:53:41,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:52:52" (1/3) ... [2021-12-06 22:53:41,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653cfd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:53:41, skipping insertion in model container [2021-12-06 22:53:41,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:52:53" (2/3) ... [2021-12-06 22:53:41,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653cfd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:53:41, skipping insertion in model container [2021-12-06 22:53:41,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:53:41" (3/3) ... [2021-12-06 22:53:41,145 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2021-12-06 22:53:41,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:53:41,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:53:41,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:53:41,204 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 [2021-12-06 22:53:41,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:53:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-06 22:53:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 22:53:41,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:41,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:41,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2021-12-06 22:53:41,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:41,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267062729] [2021-12-06 22:53:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:41,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:42,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:42,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267062729] [2021-12-06 22:53:42,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267062729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:42,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:42,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:53:42,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311530151] [2021-12-06 22:53:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:42,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:53:42,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:53:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:53:42,415 INFO L87 Difference]: Start difference. First operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:42,468 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2021-12-06 22:53:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:53:42,470 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 22:53:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:42,479 INFO L225 Difference]: With dead ends: 750 [2021-12-06 22:53:42,479 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 22:53:42,485 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 [2021-12-06 22:53:42,488 INFO L933 BasicCegarLoop]: 525 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, 525 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 [2021-12-06 22:53:42,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:53:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 22:53:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-12-06 22:53:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 269 states have (on average 1.3605947955390334) internal successors, (366), 285 states have internal predecessors, (366), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-06 22:53:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2021-12-06 22:53:42,541 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2021-12-06 22:53:42,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:42,541 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2021-12-06 22:53:42,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2021-12-06 22:53:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:53:42,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:42,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:42,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:53:42,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2021-12-06 22:53:42,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:42,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504817508] [2021-12-06 22:53:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:42,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:43,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504817508] [2021-12-06 22:53:43,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504817508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:43,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:43,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:53:43,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102041198] [2021-12-06 22:53:43,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:43,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:53:43,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:53:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:53:43,422 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:43,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:43,515 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2021-12-06 22:53:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:53:43,516 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 22:53:43,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:43,520 INFO L225 Difference]: With dead ends: 744 [2021-12-06 22:53:43,520 INFO L226 Difference]: Without dead ends: 377 [2021-12-06 22:53:43,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:53:43,522 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:53:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-06 22:53:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2021-12-06 22:53:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 289 states have internal predecessors, (370), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-06 22:53:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2021-12-06 22:53:43,552 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2021-12-06 22:53:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2021-12-06 22:53:43,553 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2021-12-06 22:53:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:53:43,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:43,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:53:43,554 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2021-12-06 22:53:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:43,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335005123] [2021-12-06 22:53:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:43,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:53:45,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335005123] [2021-12-06 22:53:45,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335005123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:45,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:45,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:53:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195876052] [2021-12-06 22:53:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:45,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:53:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:53:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:53:45,851 INFO L87 Difference]: Start difference. First operand 375 states and 516 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:46,015 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2021-12-06 22:53:46,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:53:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 22:53:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:46,019 INFO L225 Difference]: With dead ends: 395 [2021-12-06 22:53:46,020 INFO L226 Difference]: Without dead ends: 375 [2021-12-06 22:53:46,020 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 [2021-12-06 22:53:46,021 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 12 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:46,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:53:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-12-06 22:53:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2021-12-06 22:53:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 289 states have internal predecessors, (369), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2021-12-06 22:53:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2021-12-06 22:53:46,048 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2021-12-06 22:53:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:46,048 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2021-12-06 22:53:46,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2021-12-06 22:53:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 22:53:46,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:46,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:46,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:53:46,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2021-12-06 22:53:46,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:46,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552806125] [2021-12-06 22:53:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:46,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:53:47,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552806125] [2021-12-06 22:53:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552806125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:47,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:53:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367112945] [2021-12-06 22:53:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:53:47,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:53:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:53:47,931 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:50,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:53:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:50,231 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2021-12-06 22:53:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:53:50,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 22:53:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:50,237 INFO L225 Difference]: With dead ends: 869 [2021-12-06 22:53:50,237 INFO L226 Difference]: Without dead ends: 614 [2021-12-06 22:53:50,238 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 [2021-12-06 22:53:50,239 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:50,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 22:53:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-12-06 22:53:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2021-12-06 22:53:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 435 states have (on average 1.335632183908046) internal successors, (581), 445 states have internal predecessors, (581), 120 states have call successors, (120), 39 states have call predecessors, (120), 38 states have return successors, (129), 113 states have call predecessors, (129), 109 states have call successors, (129) [2021-12-06 22:53:50,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2021-12-06 22:53:50,268 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2021-12-06 22:53:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:50,268 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2021-12-06 22:53:50,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:50,269 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2021-12-06 22:53:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 22:53:50,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:50,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:50,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:53:50,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:50,271 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2021-12-06 22:53:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818261] [2021-12-06 22:53:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:50,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:53:52,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:52,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818261] [2021-12-06 22:53:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:52,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:52,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:53:52,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228494139] [2021-12-06 22:53:52,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:52,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:53:52,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:53:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:53:52,123 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:52,268 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2021-12-06 22:53:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:53:52,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 22:53:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:52,274 INFO L225 Difference]: With dead ends: 1408 [2021-12-06 22:53:52,274 INFO L226 Difference]: Without dead ends: 945 [2021-12-06 22:53:52,276 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 [2021-12-06 22:53:52,277 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 421 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:52,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 924 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:53:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-12-06 22:53:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2021-12-06 22:53:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 663 states have (on average 1.3423831070889893) internal successors, (890), 674 states have internal predecessors, (890), 189 states have call successors, (189), 62 states have call predecessors, (189), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-06 22:53:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2021-12-06 22:53:52,319 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2021-12-06 22:53:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:52,319 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2021-12-06 22:53:52,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2021-12-06 22:53:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 22:53:52,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:52,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:52,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:53:52,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2021-12-06 22:53:52,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:52,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419330499] [2021-12-06 22:53:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:52,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:53:54,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419330499] [2021-12-06 22:53:54,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419330499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:54,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:54,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:53:54,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417244240] [2021-12-06 22:53:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:54,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:53:54,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:53:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:53:54,145 INFO L87 Difference]: Start difference. First operand 915 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:56,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:53:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:56,355 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2021-12-06 22:53:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:53:56,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 22:53:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:56,361 INFO L225 Difference]: With dead ends: 929 [2021-12-06 22:53:56,361 INFO L226 Difference]: Without dead ends: 925 [2021-12-06 22:53:56,362 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 [2021-12-06 22:53:56,362 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:56,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 22:53:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-12-06 22:53:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2021-12-06 22:53:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 673 states have (on average 1.3417533432392272) internal successors, (903), 682 states have internal predecessors, (903), 188 states have call successors, (188), 63 states have call predecessors, (188), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2021-12-06 22:53:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2021-12-06 22:53:56,398 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2021-12-06 22:53:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:56,398 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2021-12-06 22:53:56,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2021-12-06 22:53:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 22:53:56,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:56,400 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:53:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:53:56,400 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:53:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2021-12-06 22:53:56,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735208779] [2021-12-06 22:53:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:56,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:58,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:53:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:53:58,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735208779] [2021-12-06 22:53:58,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735208779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:53:58,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:53:58,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:53:58,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531065931] [2021-12-06 22:53:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:53:58,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:53:58,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:53:58,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:53:58,238 INFO L87 Difference]: Start difference. First operand 924 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:00,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:02,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:04,130 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2021-12-06 22:54:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-06 22:54:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:04,137 INFO L225 Difference]: With dead ends: 981 [2021-12-06 22:54:04,137 INFO L226 Difference]: Without dead ends: 970 [2021-12-06 22:54:04,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:54:04,139 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 648 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 138 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:04,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1084 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 665 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 22:54:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-12-06 22:54:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2021-12-06 22:54:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 706 states have internal predecessors, (932), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2021-12-06 22:54:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2021-12-06 22:54:04,183 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2021-12-06 22:54:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:04,183 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2021-12-06 22:54:04,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:04,184 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2021-12-06 22:54:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 22:54:04,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:04,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:04,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:54:04,185 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2021-12-06 22:54:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:04,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104827391] [2021-12-06 22:54:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:04,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:06,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:54:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:54:06,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:06,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104827391] [2021-12-06 22:54:06,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104827391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:06,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:06,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:06,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509704882] [2021-12-06 22:54:06,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:06,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:06,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:06,199 INFO L87 Difference]: Start difference. First operand 948 states and 1352 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:08,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:10,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:12,132 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2021-12-06 22:54:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:12,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-06 22:54:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:12,139 INFO L225 Difference]: With dead ends: 972 [2021-12-06 22:54:12,139 INFO L226 Difference]: Without dead ends: 964 [2021-12-06 22:54:12,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:54:12,141 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 637 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 134 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 1078 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-06 22:54:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-12-06 22:54:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2021-12-06 22:54:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.339568345323741) internal successors, (931), 706 states have internal predecessors, (931), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2021-12-06 22:54:12,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2021-12-06 22:54:12,181 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2021-12-06 22:54:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:12,181 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2021-12-06 22:54:12,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2021-12-06 22:54:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 22:54:12,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:12,182 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:54:12,183 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2021-12-06 22:54:12,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:12,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910214204] [2021-12-06 22:54:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:12,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:14,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:54:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:54:14,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910214204] [2021-12-06 22:54:14,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910214204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:14,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:14,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:14,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543251008] [2021-12-06 22:54:14,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:14,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:14,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:14,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:14,069 INFO L87 Difference]: Start difference. First operand 948 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:16,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:16,965 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2021-12-06 22:54:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:16,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-06 22:54:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:16,975 INFO L225 Difference]: With dead ends: 1745 [2021-12-06 22:54:16,976 INFO L226 Difference]: Without dead ends: 1716 [2021-12-06 22:54:16,976 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 [2021-12-06 22:54:16,977 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 674 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 138 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:16,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 1121 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-12-06 22:54:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-12-06 22:54:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2021-12-06 22:54:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1218 states have (on average 1.348111658456486) internal successors, (1642), 1233 states have internal predecessors, (1642), 338 states have call successors, (338), 119 states have call predecessors, (338), 120 states have return successors, (446), 334 states have call predecessors, (446), 329 states have call successors, (446) [2021-12-06 22:54:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2021-12-06 22:54:17,051 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2021-12-06 22:54:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:17,051 INFO L470 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2021-12-06 22:54:17,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2021-12-06 22:54:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 22:54:17,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:17,052 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:54:17,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:54:17,053 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2021-12-06 22:54:17,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:17,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15177754] [2021-12-06 22:54:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:17,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:18,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 22:54:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:54:18,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15177754] [2021-12-06 22:54:18,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15177754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:18,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:18,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:54:18,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519319046] [2021-12-06 22:54:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:54:18,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:54:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:18,927 INFO L87 Difference]: Start difference. First operand 1677 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:21,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:23,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:24,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:54:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:25,248 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2021-12-06 22:54:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-06 22:54:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:25,258 INFO L225 Difference]: With dead ends: 1710 [2021-12-06 22:54:25,258 INFO L226 Difference]: Without dead ends: 1692 [2021-12-06 22:54:25,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:25,260 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 152 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 71 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:25,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1415 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 361 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-12-06 22:54:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-06 22:54:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2021-12-06 22:54:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1215 states have (on average 1.348148148148148) internal successors, (1638), 1230 states have internal predecessors, (1638), 337 states have call successors, (337), 119 states have call predecessors, (337), 120 states have return successors, (445), 333 states have call predecessors, (445), 328 states have call successors, (445) [2021-12-06 22:54:25,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2021-12-06 22:54:25,323 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2021-12-06 22:54:25,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:25,323 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2021-12-06 22:54:25,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2021-12-06 22:54:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:54:25,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:25,325 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-06 22:54:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:54:25,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2021-12-06 22:54:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240768873] [2021-12-06 22:54:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 22:54:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 22:54:27,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:27,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240768873] [2021-12-06 22:54:27,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240768873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:27,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:27,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:54:27,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710096746] [2021-12-06 22:54:27,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:27,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:54:27,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:27,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:54:27,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:54:27,300 INFO L87 Difference]: Start difference. First operand 1673 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:29,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:31,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:33,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:37,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:39,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:40,212 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2021-12-06 22:54:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:54:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-12-06 22:54:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:40,227 INFO L225 Difference]: With dead ends: 2633 [2021-12-06 22:54:40,227 INFO L226 Difference]: Without dead ends: 2625 [2021-12-06 22:54:40,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:54:40,228 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 425 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 137 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:40,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 1116 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 604 Invalid, 5 Unknown, 0 Unchecked, 12.7s Time] [2021-12-06 22:54:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-12-06 22:54:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2021-12-06 22:54:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1317 states have (on average 1.3500379650721337) internal successors, (1778), 1336 states have internal predecessors, (1778), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2021-12-06 22:54:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2021-12-06 22:54:40,323 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2021-12-06 22:54:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:40,324 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2021-12-06 22:54:40,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:54:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2021-12-06 22:54:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 22:54:40,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:40,325 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-06 22:54:40,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:54:40,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2021-12-06 22:54:40,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65121902] [2021-12-06 22:54:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:40,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 22:54:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:41,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65121902] [2021-12-06 22:54:41,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65121902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:54:41,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246233384] [2021-12-06 22:54:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:41,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:41,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:54:41,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:54:41,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:54:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:47,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 19440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 22:54:47,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:47,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:54:47,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246233384] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:47,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:47,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-06 22:54:47,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041181083] [2021-12-06 22:54:47,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:47,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:54:47,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:54:47,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:54:47,355 INFO L87 Difference]: Start difference. First operand 1815 states and 2637 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:54:49,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:51,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:54:55,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:54:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:56,948 INFO L93 Difference]: Finished difference Result 4528 states and 6798 transitions. [2021-12-06 22:54:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:54:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-06 22:54:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:56,970 INFO L225 Difference]: With dead ends: 4528 [2021-12-06 22:54:56,971 INFO L226 Difference]: Without dead ends: 2719 [2021-12-06 22:54:56,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:54:56,978 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 508 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 143 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1485 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:56,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1485 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 646 Invalid, 3 Unknown, 0 Unchecked, 9.4s Time] [2021-12-06 22:54:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-12-06 22:54:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1825. [2021-12-06 22:54:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1327 states have (on average 1.3474001507159006) internal successors, (1788), 1346 states have internal predecessors, (1788), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2021-12-06 22:54:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2647 transitions. [2021-12-06 22:54:57,095 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2647 transitions. Word has length 44 [2021-12-06 22:54:57,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:57,096 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2647 transitions. [2021-12-06 22:54:57,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:54:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2647 transitions. [2021-12-06 22:54:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:54:57,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:54:57,097 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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] [2021-12-06 22:54:57,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:54:57,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:57,298 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:54:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:54:57,298 INFO L85 PathProgramCache]: Analyzing trace with hash -260205666, now seen corresponding path program 2 times [2021-12-06 22:54:57,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:54:57,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710482994] [2021-12-06 22:54:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:54:57,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:54:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:59,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 22:54:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:54:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:54:59,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:54:59,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710482994] [2021-12-06 22:54:59,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710482994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:54:59,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:54:59,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:54:59,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905934798] [2021-12-06 22:54:59,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:54:59,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:54:59,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:54:59,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:54:59,241 INFO L87 Difference]: Start difference. First operand 1825 states and 2647 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:01,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:03,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:06,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:55:08,599 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:55:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:09,467 INFO L93 Difference]: Finished difference Result 1874 states and 2710 transitions. [2021-12-06 22:55:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:55:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-06 22:55:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:09,477 INFO L225 Difference]: With dead ends: 1874 [2021-12-06 22:55:09,477 INFO L226 Difference]: Without dead ends: 1842 [2021-12-06 22:55:09,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:55:09,478 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 178 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 72 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:09,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1755 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 500 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time] [2021-12-06 22:55:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-12-06 22:55:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1823. [2021-12-06 22:55:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.3461538461538463) internal successors, (1785), 1345 states have internal predecessors, (1785), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-06 22:55:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2642 transitions. [2021-12-06 22:55:09,553 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2642 transitions. Word has length 54 [2021-12-06 22:55:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:09,554 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 2642 transitions. [2021-12-06 22:55:09,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2642 transitions. [2021-12-06 22:55:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:55:09,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:09,555 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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] [2021-12-06 22:55:09,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:55:09,555 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:55:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash 462825716, now seen corresponding path program 1 times [2021-12-06 22:55:09,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:09,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685033772] [2021-12-06 22:55:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:09,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:11,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:55:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:55:11,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:11,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685033772] [2021-12-06 22:55:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685033772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:55:11,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:55:11,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:55:11,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737738516] [2021-12-06 22:55:11,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:55:11,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:55:11,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:11,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:55:11,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:55:11,465 INFO L87 Difference]: Start difference. First operand 1823 states and 2642 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:13,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:15,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:17,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:23,940 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:24,757 INFO L93 Difference]: Finished difference Result 2645 states and 4042 transitions. [2021-12-06 22:55:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:55:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-12-06 22:55:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:24,774 INFO L225 Difference]: With dead ends: 2645 [2021-12-06 22:55:24,774 INFO L226 Difference]: Without dead ends: 2637 [2021-12-06 22:55:24,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:55:24,776 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1173 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 479 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:24,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1203 Valid, 1213 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 981 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2021-12-06 22:55:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-12-06 22:55:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1823. [2021-12-06 22:55:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1326 states have (on average 1.345399698340875) internal successors, (1784), 1345 states have internal predecessors, (1784), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-06 22:55:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2641 transitions. [2021-12-06 22:55:24,900 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2641 transitions. Word has length 54 [2021-12-06 22:55:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:24,900 INFO L470 AbstractCegarLoop]: Abstraction has 1823 states and 2641 transitions. [2021-12-06 22:55:24,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2641 transitions. [2021-12-06 22:55:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:55:24,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:24,901 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1] [2021-12-06 22:55:24,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:55:24,901 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:55:24,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:24,901 INFO L85 PathProgramCache]: Analyzing trace with hash 565671181, now seen corresponding path program 1 times [2021-12-06 22:55:24,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:24,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847498051] [2021-12-06 22:55:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:24,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:55:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:55:26,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:26,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847498051] [2021-12-06 22:55:26,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847498051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:55:26,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:55:26,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:55:26,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575478837] [2021-12-06 22:55:26,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:55:26,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:55:26,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:26,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:55:26,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:55:26,880 INFO L87 Difference]: Start difference. First operand 1823 states and 2641 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:29,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:31,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:33,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:35,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:37,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:39,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:41,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:43,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:49,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:49,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:55:49,842 INFO L93 Difference]: Finished difference Result 1992 states and 2980 transitions. [2021-12-06 22:55:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:55:49,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-06 22:55:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:55:49,854 INFO L225 Difference]: With dead ends: 1992 [2021-12-06 22:55:49,854 INFO L226 Difference]: Without dead ends: 1988 [2021-12-06 22:55:49,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:55:49,856 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 91 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 75 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2408 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:55:49,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 2408 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1041 Invalid, 9 Unknown, 0 Unchecked, 22.8s Time] [2021-12-06 22:55:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-12-06 22:55:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1830. [2021-12-06 22:55:49,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1333 states have (on average 1.3443360840210052) internal successors, (1792), 1352 states have internal predecessors, (1792), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2021-12-06 22:55:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2649 transitions. [2021-12-06 22:55:49,941 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2649 transitions. Word has length 55 [2021-12-06 22:55:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:55:49,941 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 2649 transitions. [2021-12-06 22:55:49,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2649 transitions. [2021-12-06 22:55:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:55:49,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:55:49,942 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1] [2021-12-06 22:55:49,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:55:49,942 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:55:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:55:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash 565394351, now seen corresponding path program 1 times [2021-12-06 22:55:49,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:55:49,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292558018] [2021-12-06 22:55:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:55:49,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:55:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:52,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-06 22:55:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:55:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:55:52,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:55:52,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292558018] [2021-12-06 22:55:52,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292558018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:55:52,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:55:52,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:55:52,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874474469] [2021-12-06 22:55:52,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:55:52,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:55:52,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:55:52,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:55:52,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:55:52,080 INFO L87 Difference]: Start difference. First operand 1830 states and 2649 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:55:54,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:56,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:55:58,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:03,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:06,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:06,762 INFO L93 Difference]: Finished difference Result 2646 states and 4042 transitions. [2021-12-06 22:56:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:56:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-06 22:56:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:06,778 INFO L225 Difference]: With dead ends: 2646 [2021-12-06 22:56:06,778 INFO L226 Difference]: Without dead ends: 2630 [2021-12-06 22:56:06,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:56:06,780 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1156 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 476 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:06,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 1214 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 979 Invalid, 5 Unknown, 0 Unchecked, 14.2s Time] [2021-12-06 22:56:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-12-06 22:56:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 1822. [2021-12-06 22:56:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1326 states have (on average 1.3446455505279036) internal successors, (1783), 1345 states have internal predecessors, (1783), 363 states have call successors, (363), 128 states have call predecessors, (363), 132 states have return successors, (492), 358 states have call predecessors, (492), 354 states have call successors, (492) [2021-12-06 22:56:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2638 transitions. [2021-12-06 22:56:06,922 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2638 transitions. Word has length 55 [2021-12-06 22:56:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 2638 transitions. [2021-12-06 22:56:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:56:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2638 transitions. [2021-12-06 22:56:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:56:06,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:06,923 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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] [2021-12-06 22:56:06,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 22:56:06,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1051370444, now seen corresponding path program 1 times [2021-12-06 22:56:06,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127646] [2021-12-06 22:56:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:06,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:09,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:09,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127646] [2021-12-06 22:56:09,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:09,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:09,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:56:09,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209501780] [2021-12-06 22:56:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:09,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:56:09,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:56:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:56:09,159 INFO L87 Difference]: Start difference. First operand 1822 states and 2638 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:09,857 INFO L93 Difference]: Finished difference Result 1849 states and 2663 transitions. [2021-12-06 22:56:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:56:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 22:56:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:09,866 INFO L225 Difference]: With dead ends: 1849 [2021-12-06 22:56:09,866 INFO L226 Difference]: Without dead ends: 1825 [2021-12-06 22:56:09,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:56:09,867 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 478 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:09,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 752 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:56:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-12-06 22:56:09,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1814. [2021-12-06 22:56:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1319 states have (on average 1.3449583017437452) internal successors, (1774), 1339 states have internal predecessors, (1774), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (490), 356 states have call predecessors, (490), 354 states have call successors, (490) [2021-12-06 22:56:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2627 transitions. [2021-12-06 22:56:09,950 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2627 transitions. Word has length 54 [2021-12-06 22:56:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:09,950 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2627 transitions. [2021-12-06 22:56:09,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2627 transitions. [2021-12-06 22:56:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:56:09,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:09,951 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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] [2021-12-06 22:56:09,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:56:09,951 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1727279395, now seen corresponding path program 1 times [2021-12-06 22:56:09,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:09,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926921118] [2021-12-06 22:56:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:09,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:11,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:11,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926921118] [2021-12-06 22:56:11,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926921118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:11,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:11,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:56:11,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145757560] [2021-12-06 22:56:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:11,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:56:11,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:56:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:56:11,722 INFO L87 Difference]: Start difference. First operand 1814 states and 2627 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:12,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:12,395 INFO L93 Difference]: Finished difference Result 1852 states and 2668 transitions. [2021-12-06 22:56:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:56:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 22:56:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:12,404 INFO L225 Difference]: With dead ends: 1852 [2021-12-06 22:56:12,404 INFO L226 Difference]: Without dead ends: 1815 [2021-12-06 22:56:12,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:56:12,406 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 465 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:12,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 761 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:56:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-12-06 22:56:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1813. [2021-12-06 22:56:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3429438543247345) internal successors, (1770), 1338 states have internal predecessors, (1770), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (489), 356 states have call predecessors, (489), 354 states have call successors, (489) [2021-12-06 22:56:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2622 transitions. [2021-12-06 22:56:12,536 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2622 transitions. Word has length 54 [2021-12-06 22:56:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:12,536 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2622 transitions. [2021-12-06 22:56:12,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2622 transitions. [2021-12-06 22:56:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:56:12,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:12,537 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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] [2021-12-06 22:56:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:56:12,538 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1993698781, now seen corresponding path program 1 times [2021-12-06 22:56:12,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683645825] [2021-12-06 22:56:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:12,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:14,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683645825] [2021-12-06 22:56:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683645825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:14,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:56:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655573697] [2021-12-06 22:56:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:14,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:56:14,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:56:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:56:14,355 INFO L87 Difference]: Start difference. First operand 1813 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:16,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:16,725 INFO L93 Difference]: Finished difference Result 2552 states and 3800 transitions. [2021-12-06 22:56:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:56:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 22:56:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:16,733 INFO L225 Difference]: With dead ends: 2552 [2021-12-06 22:56:16,733 INFO L226 Difference]: Without dead ends: 2539 [2021-12-06 22:56:16,734 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 [2021-12-06 22:56:16,735 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:16,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 22:56:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-12-06 22:56:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1813. [2021-12-06 22:56:16,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1318 states have (on average 1.3406676783004552) internal successors, (1767), 1338 states have internal predecessors, (1767), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-06 22:56:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2626 transitions. [2021-12-06 22:56:16,824 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2626 transitions. Word has length 54 [2021-12-06 22:56:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:16,825 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2626 transitions. [2021-12-06 22:56:16,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2626 transitions. [2021-12-06 22:56:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:56:16,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:16,826 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1] [2021-12-06 22:56:16,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:56:16,826 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:16,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2128531258, now seen corresponding path program 1 times [2021-12-06 22:56:16,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:16,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828039963] [2021-12-06 22:56:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:16,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:18,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:18,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828039963] [2021-12-06 22:56:18,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828039963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:18,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:18,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:56:18,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18361451] [2021-12-06 22:56:18,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:18,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:56:18,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:56:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:56:18,825 INFO L87 Difference]: Start difference. First operand 1813 states and 2626 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:20,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:23,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:25,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:27,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:29,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:29,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:29,576 INFO L93 Difference]: Finished difference Result 1827 states and 2641 transitions. [2021-12-06 22:56:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:56:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 22:56:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:29,586 INFO L225 Difference]: With dead ends: 1827 [2021-12-06 22:56:29,586 INFO L226 Difference]: Without dead ends: 1823 [2021-12-06 22:56:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:56:29,588 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 42 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:29,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 2249 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 5 Unknown, 0 Unchecked, 10.6s Time] [2021-12-06 22:56:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-12-06 22:56:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1819. [2021-12-06 22:56:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1324 states have (on average 1.3398791540785497) internal successors, (1774), 1344 states have internal predecessors, (1774), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-06 22:56:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2633 transitions. [2021-12-06 22:56:29,672 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2633 transitions. Word has length 55 [2021-12-06 22:56:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:29,672 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2633 transitions. [2021-12-06 22:56:29,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2633 transitions. [2021-12-06 22:56:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:56:29,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:29,673 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1] [2021-12-06 22:56:29,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 22:56:29,674 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2128254428, now seen corresponding path program 1 times [2021-12-06 22:56:29,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:29,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153801874] [2021-12-06 22:56:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:29,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:31,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153801874] [2021-12-06 22:56:31,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153801874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:31,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:31,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:56:31,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425019581] [2021-12-06 22:56:31,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:31,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:56:31,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:56:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:56:31,593 INFO L87 Difference]: Start difference. First operand 1819 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:32,557 INFO L93 Difference]: Finished difference Result 2547 states and 3793 transitions. [2021-12-06 22:56:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:56:32,558 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 22:56:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:32,564 INFO L225 Difference]: With dead ends: 2547 [2021-12-06 22:56:32,565 INFO L226 Difference]: Without dead ends: 2520 [2021-12-06 22:56:32,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:56:32,566 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 665 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:32,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 1046 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:56:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-12-06 22:56:32,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1796. [2021-12-06 22:56:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1301 states have (on average 1.342044581091468) internal successors, (1746), 1321 states have internal predecessors, (1746), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2021-12-06 22:56:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 2605 transitions. [2021-12-06 22:56:32,656 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 2605 transitions. Word has length 55 [2021-12-06 22:56:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 2605 transitions. [2021-12-06 22:56:32,656 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:56:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 2605 transitions. [2021-12-06 22:56:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 22:56:32,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:32,657 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1] [2021-12-06 22:56:32,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 22:56:32,657 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2028226751, now seen corresponding path program 1 times [2021-12-06 22:56:32,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:32,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181805730] [2021-12-06 22:56:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:32,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:34,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 22:56:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:34,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:34,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181805730] [2021-12-06 22:56:34,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181805730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:34,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:34,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:56:34,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45786952] [2021-12-06 22:56:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:34,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:56:34,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:56:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:56:34,777 INFO L87 Difference]: Start difference. First operand 1796 states and 2605 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:56:36,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:39,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:41,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:43,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:45,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:47,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:49,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:51,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:56,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:56:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:56:57,272 INFO L93 Difference]: Finished difference Result 1956 states and 2933 transitions. [2021-12-06 22:56:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:56:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-12-06 22:56:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:56:57,279 INFO L225 Difference]: With dead ends: 1956 [2021-12-06 22:56:57,279 INFO L226 Difference]: Without dead ends: 1937 [2021-12-06 22:56:57,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:56:57,280 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 87 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 71 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:56:57,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 2210 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 993 Invalid, 9 Unknown, 0 Unchecked, 22.3s Time] [2021-12-06 22:56:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-06 22:56:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1783. [2021-12-06 22:56:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1289 states have (on average 1.343677269200931) internal successors, (1732), 1309 states have internal predecessors, (1732), 361 states have call successors, (361), 128 states have call predecessors, (361), 132 states have return successors, (496), 355 states have call predecessors, (496), 353 states have call successors, (496) [2021-12-06 22:56:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2589 transitions. [2021-12-06 22:56:57,368 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2589 transitions. Word has length 57 [2021-12-06 22:56:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:56:57,368 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2589 transitions. [2021-12-06 22:56:57,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:56:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2589 transitions. [2021-12-06 22:56:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 22:56:57,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:56:57,369 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:56:57,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:56:57,370 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:56:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:56:57,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1367138182, now seen corresponding path program 1 times [2021-12-06 22:56:57,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:56:57,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900637163] [2021-12-06 22:56:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:56:57,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:56:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-06 22:56:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:56:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:56:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:56:59,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:56:59,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900637163] [2021-12-06 22:56:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900637163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:56:59,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:56:59,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 22:56:59,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817895190] [2021-12-06 22:56:59,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:56:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:56:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:56:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:56:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:56:59,618 INFO L87 Difference]: Start difference. First operand 1783 states and 2589 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:57:01,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:03,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:06,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:08,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:10,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:12,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:14,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:16,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:18,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:20,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:24,996 INFO L93 Difference]: Finished difference Result 1939 states and 2913 transitions. [2021-12-06 22:57:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:57:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 65 [2021-12-06 22:57:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:25,002 INFO L225 Difference]: With dead ends: 1939 [2021-12-06 22:57:25,002 INFO L226 Difference]: Without dead ends: 1907 [2021-12-06 22:57:25,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:57:25,004 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 86 mSDsluCounter, 2335 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 68 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2764 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:25,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2764 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1287 Invalid, 10 Unknown, 0 Unchecked, 25.2s Time] [2021-12-06 22:57:25,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-12-06 22:57:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1750. [2021-12-06 22:57:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1261 states have (on average 1.3481363996827915) internal successors, (1700), 1280 states have internal predecessors, (1700), 358 states have call successors, (358), 126 states have call predecessors, (358), 130 states have return successors, (486), 353 states have call predecessors, (486), 351 states have call successors, (486) [2021-12-06 22:57:25,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2544 transitions. [2021-12-06 22:57:25,094 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2544 transitions. Word has length 65 [2021-12-06 22:57:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:25,094 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 2544 transitions. [2021-12-06 22:57:25,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:57:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2544 transitions. [2021-12-06 22:57:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 22:57:25,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:25,096 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:25,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:57:25,096 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:57:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash -235276034, now seen corresponding path program 1 times [2021-12-06 22:57:25,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931716535] [2021-12-06 22:57:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:25,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:26,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:57:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:26,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 22:57:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:27,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:57:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:57:27,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931716535] [2021-12-06 22:57:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931716535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:57:27,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:57:27,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:57:27,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972368723] [2021-12-06 22:57:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:57:27,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:57:27,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:57:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:57:27,048 INFO L87 Difference]: Start difference. First operand 1750 states and 2544 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 22:57:29,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:31,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:33,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:35,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:37,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:40,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:57:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:57:43,146 INFO L93 Difference]: Finished difference Result 2002 states and 2973 transitions. [2021-12-06 22:57:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:57:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2021-12-06 22:57:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:57:43,150 INFO L225 Difference]: With dead ends: 2002 [2021-12-06 22:57:43,150 INFO L226 Difference]: Without dead ends: 1200 [2021-12-06 22:57:43,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:57:43,153 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 590 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 131 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:57:43,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 984 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 748 Invalid, 6 Unknown, 0 Unchecked, 15.8s Time] [2021-12-06 22:57:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-12-06 22:57:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1046. [2021-12-06 22:57:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 768 states have (on average 1.328125) internal successors, (1020), 782 states have internal predecessors, (1020), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2021-12-06 22:57:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1484 transitions. [2021-12-06 22:57:43,235 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1484 transitions. Word has length 69 [2021-12-06 22:57:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:57:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1484 transitions. [2021-12-06 22:57:43,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 22:57:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1484 transitions. [2021-12-06 22:57:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 22:57:43,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:57:43,236 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:57:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 22:57:43,236 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:57:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:57:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -497708636, now seen corresponding path program 1 times [2021-12-06 22:57:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:57:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575692859] [2021-12-06 22:57:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:57:43,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:57:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:45,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:57:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 22:57:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:45,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 22:57:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 22:57:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:57:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:57:45,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:57:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575692859] [2021-12-06 22:57:45,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575692859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:57:45,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:57:45,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:57:45,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848331956] [2021-12-06 22:57:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:57:45,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:57:45,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:57:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:57:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:57:45,150 INFO L87 Difference]: Start difference. First operand 1046 states and 1484 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:57:47,287 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:49,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:51,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:53,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:55,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:57:57,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:58:01,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:01,865 INFO L93 Difference]: Finished difference Result 2210 states and 3299 transitions. [2021-12-06 22:58:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:58:01,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2021-12-06 22:58:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:01,870 INFO L225 Difference]: With dead ends: 2210 [2021-12-06 22:58:01,870 INFO L226 Difference]: Without dead ends: 1289 [2021-12-06 22:58:01,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:58:01,874 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 469 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 270 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:01,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1219 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 649 Invalid, 6 Unknown, 0 Unchecked, 16.3s Time] [2021-12-06 22:58:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-06 22:58:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1067. [2021-12-06 22:58:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 789 states have (on average 1.3307984790874525) internal successors, (1050), 800 states have internal predecessors, (1050), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2021-12-06 22:58:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1514 transitions. [2021-12-06 22:58:01,937 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1514 transitions. Word has length 73 [2021-12-06 22:58:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:01,937 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1514 transitions. [2021-12-06 22:58:01,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:58:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1514 transitions. [2021-12-06 22:58:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-06 22:58:01,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:01,938 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:01,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 22:58:01,938 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:58:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1522071587, now seen corresponding path program 1 times [2021-12-06 22:58:01,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:01,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114791233] [2021-12-06 22:58:01,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:01,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:03,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 22:58:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:03,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 22:58:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:58:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:03,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:58:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:58:03,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:03,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114791233] [2021-12-06 22:58:03,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114791233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:58:03,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:58:03,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 22:58:03,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256045453] [2021-12-06 22:58:03,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:58:03,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:58:03,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:58:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:58:03,968 INFO L87 Difference]: Start difference. First operand 1067 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:58:06,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:08,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:14,432 INFO L93 Difference]: Finished difference Result 2362 states and 3646 transitions. [2021-12-06 22:58:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:58:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2021-12-06 22:58:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:14,440 INFO L225 Difference]: With dead ends: 2362 [2021-12-06 22:58:14,440 INFO L226 Difference]: Without dead ends: 1418 [2021-12-06 22:58:14,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:58:14,444 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 278 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 120 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:14,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2164 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1316 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-12-06 22:58:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-12-06 22:58:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1106. [2021-12-06 22:58:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 824 states have (on average 1.3300970873786409) internal successors, (1096), 835 states have internal predecessors, (1096), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-06 22:58:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1612 transitions. [2021-12-06 22:58:14,513 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1612 transitions. Word has length 77 [2021-12-06 22:58:14,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:14,514 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1612 transitions. [2021-12-06 22:58:14,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 22:58:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1612 transitions. [2021-12-06 22:58:14,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 22:58:14,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:14,515 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:14,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 22:58:14,515 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:58:14,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -552416072, now seen corresponding path program 1 times [2021-12-06 22:58:14,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:14,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067189221] [2021-12-06 22:58:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:14,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 22:58:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:58:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 22:58:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 22:58:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 22:58:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:58:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 22:58:16,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:16,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067189221] [2021-12-06 22:58:16,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067189221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:58:16,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:58:16,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:58:16,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141035844] [2021-12-06 22:58:16,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:58:16,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:58:16,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:16,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:58:16,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:58:16,551 INFO L87 Difference]: Start difference. First operand 1106 states and 1612 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 22:58:18,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:20,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:22,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:28,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:30,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:31,365 INFO L93 Difference]: Finished difference Result 2332 states and 3753 transitions. [2021-12-06 22:58:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:58:31,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 92 [2021-12-06 22:58:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:31,375 INFO L225 Difference]: With dead ends: 2332 [2021-12-06 22:58:31,375 INFO L226 Difference]: Without dead ends: 2329 [2021-12-06 22:58:31,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:58:31,377 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 572 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 301 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:31,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1465 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 891 Invalid, 5 Unknown, 0 Unchecked, 14.5s Time] [2021-12-06 22:58:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2021-12-06 22:58:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1114. [2021-12-06 22:58:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 832 states have (on average 1.3317307692307692) internal successors, (1108), 843 states have internal predecessors, (1108), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-06 22:58:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1624 transitions. [2021-12-06 22:58:31,459 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1624 transitions. Word has length 92 [2021-12-06 22:58:31,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:31,459 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1624 transitions. [2021-12-06 22:58:31,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 22:58:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1624 transitions. [2021-12-06 22:58:31,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 22:58:31,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:31,461 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:31,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-06 22:58:31,461 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:58:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash -460104214, now seen corresponding path program 1 times [2021-12-06 22:58:31,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:31,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521574066] [2021-12-06 22:58:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:31,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-06 22:58:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 22:58:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-06 22:58:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:58:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:58:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 22:58:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:58:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:58:33,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521574066] [2021-12-06 22:58:33,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521574066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28365279] [2021-12-06 22:58:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:33,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:33,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:33,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:33,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:58:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 19863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:58:41,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:58:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:58:42,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:58:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:58:42,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28365279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:58:42,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:58:42,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2021-12-06 22:58:42,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671182644] [2021-12-06 22:58:42,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:58:42,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:58:42,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:58:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:58:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:58:42,610 INFO L87 Difference]: Start difference. First operand 1114 states and 1624 transitions. Second operand has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 22:58:44,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:47,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:51,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:58:56,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:58:57,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:58:57,084 INFO L93 Difference]: Finished difference Result 2507 states and 3814 transitions. [2021-12-06 22:58:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:58:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 93 [2021-12-06 22:58:57,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:58:57,089 INFO L225 Difference]: With dead ends: 2507 [2021-12-06 22:58:57,090 INFO L226 Difference]: Without dead ends: 1407 [2021-12-06 22:58:57,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:58:57,094 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 899 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 465 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:58:57,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 1430 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1162 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2021-12-06 22:58:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-12-06 22:58:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1132. [2021-12-06 22:58:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 850 states have (on average 1.3247058823529412) internal successors, (1126), 861 states have internal predecessors, (1126), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2021-12-06 22:58:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1642 transitions. [2021-12-06 22:58:57,168 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1642 transitions. Word has length 93 [2021-12-06 22:58:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:58:57,169 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1642 transitions. [2021-12-06 22:58:57,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 22:58:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1642 transitions. [2021-12-06 22:58:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 22:58:57,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:58:57,170 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:58:57,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:58:57,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:58:57,371 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:58:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:58:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -832236025, now seen corresponding path program 2 times [2021-12-06 22:58:57,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:58:57,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351694415] [2021-12-06 22:58:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:58:57,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:58:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:58:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 22:58:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 22:58:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:58:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:58:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 22:58:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:58:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:58:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 22:58:59,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:58:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351694415] [2021-12-06 22:58:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351694415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:58:59,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866517164] [2021-12-06 22:58:59,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:58:59,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:58:59,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:58:59,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:58:59,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:59:08,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:59:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:59:08,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 19788 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:59:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 22:59:08,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:59:08,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866517164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:08,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:59:08,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [21] total 24 [2021-12-06 22:59:08,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358471184] [2021-12-06 22:59:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:08,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:59:08,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:59:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:59:08,914 INFO L87 Difference]: Start difference. First operand 1132 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 22:59:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:09,053 INFO L93 Difference]: Finished difference Result 2122 states and 3202 transitions. [2021-12-06 22:59:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:59:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 111 [2021-12-06 22:59:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:09,057 INFO L225 Difference]: With dead ends: 2122 [2021-12-06 22:59:09,057 INFO L226 Difference]: Without dead ends: 1172 [2021-12-06 22:59:09,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:59:09,060 INFO L933 BasicCegarLoop]: 435 mSDtfsCounter, 15 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1723 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:09,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1723 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-12-06 22:59:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1151. [2021-12-06 22:59:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 866 states have (on average 1.3221709006928406) internal successors, (1145), 880 states have internal predecessors, (1145), 195 states have call successors, (195), 78 states have call predecessors, (195), 89 states have return successors, (337), 196 states have call predecessors, (337), 188 states have call successors, (337) [2021-12-06 22:59:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1677 transitions. [2021-12-06 22:59:09,129 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1677 transitions. Word has length 111 [2021-12-06 22:59:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:09,129 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1677 transitions. [2021-12-06 22:59:09,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-06 22:59:09,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1677 transitions. [2021-12-06 22:59:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 22:59:09,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:09,139 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:09,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:59:09,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 22:59:09,340 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1321037536, now seen corresponding path program 1 times [2021-12-06 22:59:09,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915189365] [2021-12-06 22:59:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:09,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:59:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 22:59:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 22:59:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:59:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:59:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 22:59:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:59:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 22:59:11,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:11,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915189365] [2021-12-06 22:59:11,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915189365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:11,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:11,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:59:11,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898267925] [2021-12-06 22:59:11,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:11,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:59:11,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:11,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:59:11,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:59:11,666 INFO L87 Difference]: Start difference. First operand 1151 states and 1677 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 22:59:13,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:15,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:18,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:59:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:20,278 INFO L93 Difference]: Finished difference Result 1592 states and 2427 transitions. [2021-12-06 22:59:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:59:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 111 [2021-12-06 22:59:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:20,282 INFO L225 Difference]: With dead ends: 1592 [2021-12-06 22:59:20,282 INFO L226 Difference]: Without dead ends: 578 [2021-12-06 22:59:20,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:59:20,287 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 551 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 219 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:20,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 647 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 474 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2021-12-06 22:59:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-06 22:59:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 528. [2021-12-06 22:59:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 394 states have (on average 1.2741116751269035) internal successors, (502), 399 states have internal predecessors, (502), 96 states have call successors, (96), 36 states have call predecessors, (96), 37 states have return successors, (131), 94 states have call predecessors, (131), 92 states have call successors, (131) [2021-12-06 22:59:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 729 transitions. [2021-12-06 22:59:20,332 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 729 transitions. Word has length 111 [2021-12-06 22:59:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:20,332 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 729 transitions. [2021-12-06 22:59:20,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-06 22:59:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 729 transitions. [2021-12-06 22:59:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 22:59:20,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:20,333 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:20,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-06 22:59:20,333 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 317031214, now seen corresponding path program 1 times [2021-12-06 22:59:20,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:20,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803522558] [2021-12-06 22:59:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:20,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:59:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 22:59:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 22:59:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:59:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:59:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 22:59:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:59:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 22:59:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 22:59:22,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:22,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803522558] [2021-12-06 22:59:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803522558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:22,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:22,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 22:59:22,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845756568] [2021-12-06 22:59:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:22,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 22:59:22,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 22:59:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:59:22,817 INFO L87 Difference]: Start difference. First operand 528 states and 729 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 22:59:25,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:27,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:29,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:31,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:34,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 22:59:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:37,464 INFO L93 Difference]: Finished difference Result 964 states and 1413 transitions. [2021-12-06 22:59:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:59:37,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-06 22:59:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:37,467 INFO L225 Difference]: With dead ends: 964 [2021-12-06 22:59:37,468 INFO L226 Difference]: Without dead ends: 578 [2021-12-06 22:59:37,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:59:37,470 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 579 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 269 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:37,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1099 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 907 Invalid, 4 Unknown, 0 Unchecked, 14.1s Time] [2021-12-06 22:59:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-12-06 22:59:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 523. [2021-12-06 22:59:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 390 states have (on average 1.2717948717948717) internal successors, (496), 395 states have internal predecessors, (496), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2021-12-06 22:59:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 714 transitions. [2021-12-06 22:59:37,511 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 714 transitions. Word has length 115 [2021-12-06 22:59:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:37,512 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 714 transitions. [2021-12-06 22:59:37,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 22:59:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 714 transitions. [2021-12-06 22:59:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 22:59:37,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:37,513 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:37,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-06 22:59:37,513 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash 894737780, now seen corresponding path program 1 times [2021-12-06 22:59:37,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667488293] [2021-12-06 22:59:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:37,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 22:59:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 22:59:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:59:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:59:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 22:59:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 22:59:39,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667488293] [2021-12-06 22:59:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667488293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:39,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:39,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:59:39,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092707693] [2021-12-06 22:59:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:39,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:59:39,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:39,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:59:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:59:39,734 INFO L87 Difference]: Start difference. First operand 523 states and 714 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:59:41,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:44,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:48,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:49,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:49,493 INFO L93 Difference]: Finished difference Result 965 states and 1403 transitions. [2021-12-06 22:59:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:59:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 103 [2021-12-06 22:59:49,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:49,496 INFO L225 Difference]: With dead ends: 965 [2021-12-06 22:59:49,496 INFO L226 Difference]: Without dead ends: 584 [2021-12-06 22:59:49,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:59:49,498 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 235 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 171 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:49,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1127 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 531 Invalid, 3 Unknown, 0 Unchecked, 9.5s Time] [2021-12-06 22:59:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-06 22:59:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 526. [2021-12-06 22:59:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 393 states have (on average 1.2697201017811706) internal successors, (499), 398 states have internal predecessors, (499), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2021-12-06 22:59:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 717 transitions. [2021-12-06 22:59:49,538 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 717 transitions. Word has length 103 [2021-12-06 22:59:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:49,538 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 717 transitions. [2021-12-06 22:59:49,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:59:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 717 transitions. [2021-12-06 22:59:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 22:59:49,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:49,539 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:49,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-06 22:59:49,539 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:49,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:49,539 INFO L85 PathProgramCache]: Analyzing trace with hash -877123256, now seen corresponding path program 1 times [2021-12-06 22:59:49,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:49,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579306070] [2021-12-06 22:59:49,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:49,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 22:59:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 22:59:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-06 22:59:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 22:59:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-06 22:59:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:59:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 22:59:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 22:59:51,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579306070] [2021-12-06 22:59:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579306070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:51,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:51,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 22:59:51,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608042074] [2021-12-06 22:59:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:59:51,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:59:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:59:51,859 INFO L87 Difference]: Start difference. First operand 526 states and 717 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 22:59:54,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:56,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 22:59:58,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:00,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:02,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:04,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:06,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:14,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:15,721 INFO L93 Difference]: Finished difference Result 1111 states and 1612 transitions. [2021-12-06 23:00:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:00:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2021-12-06 23:00:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:15,724 INFO L225 Difference]: With dead ends: 1111 [2021-12-06 23:00:15,724 INFO L226 Difference]: Without dead ends: 744 [2021-12-06 23:00:15,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:00:15,726 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 1282 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 826 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:00:15,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 1150 Invalid, 2424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [826 Valid, 1590 Invalid, 8 Unknown, 0 Unchecked, 22.7s Time] [2021-12-06 23:00:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-06 23:00:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 523. [2021-12-06 23:00:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 390 states have (on average 1.2615384615384615) internal successors, (492), 395 states have internal predecessors, (492), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (117), 93 states have call predecessors, (117), 92 states have call successors, (117) [2021-12-06 23:00:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 705 transitions. [2021-12-06 23:00:15,799 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 705 transitions. Word has length 117 [2021-12-06 23:00:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 705 transitions. [2021-12-06 23:00:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 5 states have internal predecessors, (70), 4 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:00:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 705 transitions. [2021-12-06 23:00:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:00:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:15,800 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-06 23:00:15,801 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:00:15,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1607212468, now seen corresponding path program 1 times [2021-12-06 23:00:15,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131344109] [2021-12-06 23:00:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:15,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 23:00:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-06 23:00:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 23:00:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:00:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:00:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-06 23:00:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:17,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131344109] [2021-12-06 23:00:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131344109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:00:17,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:00:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:00:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898830563] [2021-12-06 23:00:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:00:17,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:00:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:17,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:00:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:00:17,881 INFO L87 Difference]: Start difference. First operand 523 states and 705 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:00:20,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:22,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:24,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:26,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:28,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:33,287 INFO L93 Difference]: Finished difference Result 1160 states and 1655 transitions. [2021-12-06 23:00:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:00:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 103 [2021-12-06 23:00:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:33,291 INFO L225 Difference]: With dead ends: 1160 [2021-12-06 23:00:33,291 INFO L226 Difference]: Without dead ends: 782 [2021-12-06 23:00:33,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-12-06 23:00:33,293 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 643 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 473 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:00:33,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1010 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 701 Invalid, 5 Unknown, 0 Unchecked, 15.0s Time] [2021-12-06 23:00:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-12-06 23:00:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 682. [2021-12-06 23:00:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 502 states have (on average 1.2609561752988048) internal successors, (633), 509 states have internal predecessors, (633), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-06 23:00:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 920 transitions. [2021-12-06 23:00:33,346 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 920 transitions. Word has length 103 [2021-12-06 23:00:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:33,346 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 920 transitions. [2021-12-06 23:00:33,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:00:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 920 transitions. [2021-12-06 23:00:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 23:00:33,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:33,347 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:33,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-06 23:00:33,347 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:00:33,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:33,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1832754480, now seen corresponding path program 1 times [2021-12-06 23:00:33,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:33,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058019470] [2021-12-06 23:00:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:33,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-06 23:00:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:35,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-06 23:00:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-06 23:00:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:00:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:00:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:36,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:00:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:00:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:36,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:00:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:00:36,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058019470] [2021-12-06 23:00:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058019470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052534318] [2021-12-06 23:00:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:36,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:36,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:00:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 19965 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 23:00:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:00:46,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:00:47,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052534318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:47,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:47,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 36 [2021-12-06 23:00:47,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763069988] [2021-12-06 23:00:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:47,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:00:47,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:00:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=778, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:00:47,596 INFO L87 Difference]: Start difference. First operand 682 states and 920 transitions. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 23:00:50,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:52,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:00:59,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:00,202 INFO L93 Difference]: Finished difference Result 1436 states and 2014 transitions. [2021-12-06 23:01:00,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:01:00,203 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2021-12-06 23:01:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:00,205 INFO L225 Difference]: With dead ends: 1436 [2021-12-06 23:01:00,205 INFO L226 Difference]: Without dead ends: 784 [2021-12-06 23:01:00,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=510, Invalid=1050, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 23:01:00,208 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 884 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 401 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:00,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 1403 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1143 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2021-12-06 23:01:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-06 23:01:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 710. [2021-12-06 23:01:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 530 states have (on average 1.2471698113207548) internal successors, (661), 537 states have internal predecessors, (661), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-06 23:01:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 948 transitions. [2021-12-06 23:01:00,262 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 948 transitions. Word has length 118 [2021-12-06 23:01:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:00,262 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 948 transitions. [2021-12-06 23:01:00,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 31 states have internal predecessors, (171), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-06 23:01:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 948 transitions. [2021-12-06 23:01:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-06 23:01:00,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:00,263 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:00,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:01:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94be86e7-7a40-4608-948a-a9b83609f101/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 23:01:00,464 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:01:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 749617750, now seen corresponding path program 2 times [2021-12-06 23:01:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:00,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179545056] [2021-12-06 23:01:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:00,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:01:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:01:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:01:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:01:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:01:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:01:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:01:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:01:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:01:02,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:02,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179545056] [2021-12-06 23:01:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179545056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:01:02,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:01:02,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 23:01:02,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417670963] [2021-12-06 23:01:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:01:02,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:01:02,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:01:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:01:03,000 INFO L87 Difference]: Start difference. First operand 710 states and 948 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 23:01:05,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:07,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:09,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:11,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:13,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:15,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:19,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-12-06 23:01:24,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:26,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:27,037 INFO L93 Difference]: Finished difference Result 1309 states and 1848 transitions. [2021-12-06 23:01:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:01:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 146 [2021-12-06 23:01:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:27,040 INFO L225 Difference]: With dead ends: 1309 [2021-12-06 23:01:27,041 INFO L226 Difference]: Without dead ends: 784 [2021-12-06 23:01:27,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:01:27,043 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 232 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 173 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:27,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 2043 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1046 Invalid, 8 Unknown, 0 Unchecked, 23.6s Time] [2021-12-06 23:01:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-06 23:01:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 710. [2021-12-06 23:01:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 530 states have (on average 1.241509433962264) internal successors, (658), 537 states have internal predecessors, (658), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2021-12-06 23:01:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 945 transitions. [2021-12-06 23:01:27,095 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 945 transitions. Word has length 146 [2021-12-06 23:01:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:27,095 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 945 transitions. [2021-12-06 23:01:27,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-06 23:01:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 945 transitions. [2021-12-06 23:01:27,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 23:01:27,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:27,096 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:27,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-06 23:01:27,097 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:01:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1097416834, now seen corresponding path program 1 times [2021-12-06 23:01:27,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140245330] [2021-12-06 23:01:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:27,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:01:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-06 23:01:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:01:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 23:01:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-06 23:01:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 23:01:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:01:29,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:29,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140245330] [2021-12-06 23:01:29,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140245330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:01:29,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:01:29,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:01:29,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575879612] [2021-12-06 23:01:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:01:29,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:01:29,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:29,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:01:29,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:01:29,329 INFO L87 Difference]: Start difference. First operand 710 states and 945 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:01:31,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:33,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:35,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:37,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:43,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:44,561 INFO L93 Difference]: Finished difference Result 798 states and 1122 transitions. [2021-12-06 23:01:44,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:01:44,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 138 [2021-12-06 23:01:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:44,564 INFO L225 Difference]: With dead ends: 798 [2021-12-06 23:01:44,564 INFO L226 Difference]: Without dead ends: 735 [2021-12-06 23:01:44,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:01:44,565 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 207 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 141 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:01:44,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 1590 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 782 Invalid, 5 Unknown, 0 Unchecked, 15.0s Time] [2021-12-06 23:01:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2021-12-06 23:01:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 665. [2021-12-06 23:01:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 496 states have (on average 1.2439516129032258) internal successors, (617), 503 states have internal predecessors, (617), 122 states have call successors, (122), 43 states have call predecessors, (122), 46 states have return successors, (151), 121 states have call predecessors, (151), 119 states have call successors, (151) [2021-12-06 23:01:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 890 transitions. [2021-12-06 23:01:44,617 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 890 transitions. Word has length 138 [2021-12-06 23:01:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:44,617 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 890 transitions. [2021-12-06 23:01:44,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:01:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 890 transitions. [2021-12-06 23:01:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 23:01:44,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:44,618 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:44,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-06 23:01:44,618 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:01:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1236520754, now seen corresponding path program 1 times [2021-12-06 23:01:44,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901173752] [2021-12-06 23:01:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:44,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:01:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:01:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:01:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:01:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:01:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:01:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:01:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:01:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:01:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:01:47,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901173752] [2021-12-06 23:01:47,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901173752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:01:47,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:01:47,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:01:47,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932163224] [2021-12-06 23:01:47,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:01:47,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:01:47,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:01:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:01:47,678 INFO L87 Difference]: Start difference. First operand 665 states and 890 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:01:49,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:51,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:54,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:56,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:58,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:00,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:05,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:06,827 INFO L93 Difference]: Finished difference Result 1230 states and 1724 transitions. [2021-12-06 23:02:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:02:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 156 [2021-12-06 23:02:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:06,831 INFO L225 Difference]: With dead ends: 1230 [2021-12-06 23:02:06,831 INFO L226 Difference]: Without dead ends: 707 [2021-12-06 23:02:06,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:02:06,833 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 452 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 266 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:06,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1402 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1056 Invalid, 7 Unknown, 0 Unchecked, 18.4s Time] [2021-12-06 23:02:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-12-06 23:02:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 635. [2021-12-06 23:02:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 473 states have (on average 1.245243128964059) internal successors, (589), 482 states have internal predecessors, (589), 118 states have call successors, (118), 43 states have call predecessors, (118), 43 states have return successors, (134), 112 states have call predecessors, (134), 115 states have call successors, (134) [2021-12-06 23:02:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 841 transitions. [2021-12-06 23:02:06,883 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 841 transitions. Word has length 156 [2021-12-06 23:02:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:06,883 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 841 transitions. [2021-12-06 23:02:06,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:02:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 841 transitions. [2021-12-06 23:02:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 23:02:06,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:02:06,885 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:06,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-06 23:02:06,885 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:02:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1545285043, now seen corresponding path program 1 times [2021-12-06 23:02:06,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:06,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244033963] [2021-12-06 23:02:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:06,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:02:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:02:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:02:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:02:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:02:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:02:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:02:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:02:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 23:02:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:02:09,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:09,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244033963] [2021-12-06 23:02:09,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244033963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:09,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:09,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-06 23:02:09,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908833734] [2021-12-06 23:02:09,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:09,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:02:09,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:02:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:02:09,872 INFO L87 Difference]: Start difference. First operand 635 states and 841 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:02:12,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:14,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:16,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:21,615 INFO L93 Difference]: Finished difference Result 734 states and 1031 transitions. [2021-12-06 23:02:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:02:21,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 162 [2021-12-06 23:02:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:21,620 INFO L225 Difference]: With dead ends: 734 [2021-12-06 23:02:21,620 INFO L226 Difference]: Without dead ends: 714 [2021-12-06 23:02:21,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:02:21,621 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 318 mSDsluCounter, 3049 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 197 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:21,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 3365 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1565 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2021-12-06 23:02:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-06 23:02:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 638. [2021-12-06 23:02:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 475 states have (on average 1.2442105263157894) internal successors, (591), 485 states have internal predecessors, (591), 118 states have call successors, (118), 43 states have call predecessors, (118), 44 states have return successors, (135), 112 states have call predecessors, (135), 115 states have call successors, (135) [2021-12-06 23:02:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 844 transitions. [2021-12-06 23:02:21,672 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 844 transitions. Word has length 162 [2021-12-06 23:02:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 844 transitions. [2021-12-06 23:02:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:02:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 844 transitions. [2021-12-06 23:02:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 23:02:21,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:02:21,673 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:21,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-06 23:02:21,674 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:02:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1963891722, now seen corresponding path program 1 times [2021-12-06 23:02:21,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:21,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531500150] [2021-12-06 23:02:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:21,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:23,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:02:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:23,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:02:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:23,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:02:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:02:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:02:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:02:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:02:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:02:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 23:02:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:02:24,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:24,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531500150] [2021-12-06 23:02:24,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531500150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:24,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:24,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-06 23:02:24,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567624366] [2021-12-06 23:02:24,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:24,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:02:24,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:02:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:02:24,515 INFO L87 Difference]: Start difference. First operand 638 states and 844 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:02:26,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:28,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:30,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:37,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:38,757 INFO L93 Difference]: Finished difference Result 1221 states and 1694 transitions. [2021-12-06 23:02:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:02:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 163 [2021-12-06 23:02:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:38,761 INFO L225 Difference]: With dead ends: 1221 [2021-12-06 23:02:38,761 INFO L226 Difference]: Without dead ends: 710 [2021-12-06 23:02:38,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:02:38,764 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 261 mSDsluCounter, 3198 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 149 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:38,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 3531 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1665 Invalid, 4 Unknown, 0 Unchecked, 13.5s Time] [2021-12-06 23:02:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-06 23:02:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 623. [2021-12-06 23:02:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 464 states have (on average 1.2478448275862069) internal successors, (579), 473 states have internal predecessors, (579), 116 states have call successors, (116), 43 states have call predecessors, (116), 42 states have return successors, (126), 109 states have call predecessors, (126), 113 states have call successors, (126) [2021-12-06 23:02:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 821 transitions. [2021-12-06 23:02:38,814 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 821 transitions. Word has length 163 [2021-12-06 23:02:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:38,815 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 821 transitions. [2021-12-06 23:02:38,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:02:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 821 transitions. [2021-12-06 23:02:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 23:02:38,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:02:38,816 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:38,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-06 23:02:38,816 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:02:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1226776691, now seen corresponding path program 1 times [2021-12-06 23:02:38,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502514853] [2021-12-06 23:02:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:38,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:02:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:02:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:02:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:02:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:02:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:02:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:02:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:02:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:02:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:02:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:02:41,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:41,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502514853] [2021-12-06 23:02:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502514853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:41,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:41,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 23:02:41,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136401412] [2021-12-06 23:02:41,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:41,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:02:41,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:41,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:02:41,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:02:41,781 INFO L87 Difference]: Start difference. First operand 623 states and 821 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:02:44,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:46,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:48,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:50,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:56,918 INFO L93 Difference]: Finished difference Result 1301 states and 1855 transitions. [2021-12-06 23:02:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:02:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2021-12-06 23:02:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:56,924 INFO L225 Difference]: With dead ends: 1301 [2021-12-06 23:02:56,924 INFO L226 Difference]: Without dead ends: 1256 [2021-12-06 23:02:56,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 23:02:56,926 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 700 mSDsluCounter, 2966 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 374 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 3345 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:56,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 3345 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1957 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2021-12-06 23:02:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-12-06 23:02:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1090. [2021-12-06 23:02:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 787 states have (on average 1.2744599745870393) internal successors, (1003), 822 states have internal predecessors, (1003), 222 states have call successors, (222), 80 states have call predecessors, (222), 80 states have return successors, (245), 190 states have call predecessors, (245), 219 states have call successors, (245) [2021-12-06 23:02:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1470 transitions. [2021-12-06 23:02:57,013 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1470 transitions. Word has length 172 [2021-12-06 23:02:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:57,013 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1470 transitions. [2021-12-06 23:02:57,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:02:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1470 transitions. [2021-12-06 23:02:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 23:02:57,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:02:57,015 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:02:57,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-06 23:02:57,015 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:02:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:57,015 INFO L85 PathProgramCache]: Analyzing trace with hash -639931983, now seen corresponding path program 1 times [2021-12-06 23:02:57,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:57,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493880174] [2021-12-06 23:02:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:57,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 23:02:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 23:02:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 23:02:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:02:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:02:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:02:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:02:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:02:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:02:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-06 23:02:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:02:59,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:59,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493880174] [2021-12-06 23:02:59,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493880174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:59,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:59,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 23:02:59,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331499567] [2021-12-06 23:02:59,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:59,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:02:59,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:02:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:02:59,839 INFO L87 Difference]: Start difference. First operand 1090 states and 1470 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:03:02,077 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:04,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:06,239 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:16,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:18,344 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:03:20,011 INFO L93 Difference]: Finished difference Result 1276 states and 1817 transitions. [2021-12-06 23:03:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:03:20,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2021-12-06 23:03:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:03:20,016 INFO L225 Difference]: With dead ends: 1276 [2021-12-06 23:03:20,016 INFO L226 Difference]: Without dead ends: 1227 [2021-12-06 23:03:20,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 23:03:20,017 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 564 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 2781 mSolverCounterSat, 222 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 4835 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2781 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:03:20,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 4835 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2781 Invalid, 5 Unknown, 0 Unchecked, 18.8s Time] [2021-12-06 23:03:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-12-06 23:03:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 597. [2021-12-06 23:03:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 444 states have (on average 1.2387387387387387) internal successors, (550), 453 states have internal predecessors, (550), 112 states have call successors, (112), 41 states have call predecessors, (112), 40 states have return successors, (122), 105 states have call predecessors, (122), 109 states have call successors, (122) [2021-12-06 23:03:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 784 transitions. [2021-12-06 23:03:20,075 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 784 transitions. Word has length 172 [2021-12-06 23:03:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:03:20,075 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 784 transitions. [2021-12-06 23:03:20,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:03:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 784 transitions. [2021-12-06 23:03:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 23:03:20,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:03:20,076 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:20,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-06 23:03:20,077 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:03:20,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1524033808, now seen corresponding path program 1 times [2021-12-06 23:03:20,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597102810] [2021-12-06 23:03:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:20,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:03:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:03:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:03:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:03:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:03:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:03:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 23:03:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 23:03:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-06 23:03:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:03:22,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:22,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597102810] [2021-12-06 23:03:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597102810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:22,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:03:22,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-06 23:03:22,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076274794] [2021-12-06 23:03:22,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 23:03:22,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:22,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 23:03:22,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:03:22,557 INFO L87 Difference]: Start difference. First operand 597 states and 784 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:03:24,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:26,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:32,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:03:33,071 INFO L93 Difference]: Finished difference Result 838 states and 1212 transitions. [2021-12-06 23:03:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:03:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2021-12-06 23:03:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:03:33,075 INFO L225 Difference]: With dead ends: 838 [2021-12-06 23:03:33,075 INFO L226 Difference]: Without dead ends: 766 [2021-12-06 23:03:33,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:03:33,076 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 233 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 126 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:03:33,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 1702 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1202 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2021-12-06 23:03:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-06 23:03:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 605. [2021-12-06 23:03:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 450 states have (on average 1.2355555555555555) internal successors, (556), 459 states have internal predecessors, (556), 112 states have call successors, (112), 41 states have call predecessors, (112), 42 states have return successors, (130), 107 states have call predecessors, (130), 109 states have call successors, (130) [2021-12-06 23:03:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 798 transitions. [2021-12-06 23:03:33,133 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 798 transitions. Word has length 166 [2021-12-06 23:03:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:03:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 798 transitions. [2021-12-06 23:03:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:03:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 798 transitions. [2021-12-06 23:03:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 23:03:33,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:03:33,135 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-06 23:03:33,135 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:03:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash -161101711, now seen corresponding path program 1 times [2021-12-06 23:03:33,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:33,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319197622] [2021-12-06 23:03:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:33,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:03:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:35,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:03:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:03:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:03:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:03:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:03:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 23:03:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 23:03:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-06 23:03:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:03:36,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:36,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319197622] [2021-12-06 23:03:36,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319197622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:36,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:03:36,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 23:03:36,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719394193] [2021-12-06 23:03:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:36,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:03:36,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:03:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:03:36,325 INFO L87 Difference]: Start difference. First operand 605 states and 798 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:03:38,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:40,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:42,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:44,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:46,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:54,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:03:55,737 INFO L93 Difference]: Finished difference Result 943 states and 1499 transitions. [2021-12-06 23:03:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:03:55,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2021-12-06 23:03:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:03:55,742 INFO L225 Difference]: With dead ends: 943 [2021-12-06 23:03:55,742 INFO L226 Difference]: Without dead ends: 855 [2021-12-06 23:03:55,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:03:55,744 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 463 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 312 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 3474 SdHoareTripleChecker+Invalid, 2387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:03:55,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 3474 Invalid, 2387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 2069 Invalid, 6 Unknown, 0 Unchecked, 18.4s Time] [2021-12-06 23:03:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-12-06 23:03:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 766. [2021-12-06 23:03:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 553 states have (on average 1.2278481012658229) internal successors, (679), 567 states have internal predecessors, (679), 168 states have call successors, (168), 41 states have call predecessors, (168), 44 states have return successors, (207), 161 states have call predecessors, (207), 164 states have call successors, (207) [2021-12-06 23:03:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1054 transitions. [2021-12-06 23:03:55,811 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1054 transitions. Word has length 166 [2021-12-06 23:03:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:03:55,811 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1054 transitions. [2021-12-06 23:03:55,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:03:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1054 transitions. [2021-12-06 23:03:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-06 23:03:55,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:03:55,812 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:03:55,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-06 23:03:55,812 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:03:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:55,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1557224420, now seen corresponding path program 1 times [2021-12-06 23:03:55,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:55,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888688763] [2021-12-06 23:03:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:55,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:03:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:03:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:03:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:03:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:03:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:03:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-06 23:03:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-06 23:03:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:03:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:03:58,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:58,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888688763] [2021-12-06 23:03:58,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888688763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:03:58,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:03:58,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 23:03:58,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587556984] [2021-12-06 23:03:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:03:58,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:03:58,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:03:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:03:58,943 INFO L87 Difference]: Start difference. First operand 766 states and 1054 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:04:01,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:03,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:05,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:07,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:09,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:11,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:13,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:15,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:17,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:26,122 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:28,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:31,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:34,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:04:34,829 INFO L93 Difference]: Finished difference Result 1083 states and 1761 transitions. [2021-12-06 23:04:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:04:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 167 [2021-12-06 23:04:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:04:34,834 INFO L225 Difference]: With dead ends: 1083 [2021-12-06 23:04:34,834 INFO L226 Difference]: Without dead ends: 995 [2021-12-06 23:04:34,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:04:34,836 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 358 mSDsluCounter, 4852 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 126 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 5325 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:04:34,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 5325 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2461 Invalid, 13 Unknown, 0 Unchecked, 34.7s Time] [2021-12-06 23:04:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-12-06 23:04:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 743. [2021-12-06 23:04:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 536 states have (on average 1.2332089552238805) internal successors, (661), 549 states have internal predecessors, (661), 165 states have call successors, (165), 41 states have call predecessors, (165), 41 states have return successors, (187), 156 states have call predecessors, (187), 161 states have call successors, (187) [2021-12-06 23:04:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1013 transitions. [2021-12-06 23:04:34,905 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1013 transitions. Word has length 167 [2021-12-06 23:04:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:04:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1013 transitions. [2021-12-06 23:04:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:04:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1013 transitions. [2021-12-06 23:04:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 23:04:34,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:04:34,907 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:04:34,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-06 23:04:34,907 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:04:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1472821169, now seen corresponding path program 1 times [2021-12-06 23:04:34,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:34,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101693720] [2021-12-06 23:04:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:34,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:04:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:04:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:04:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:04:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:04:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:04:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:04:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 23:04:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:38,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:04:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:38,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-06 23:04:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:04:38,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101693720] [2021-12-06 23:04:38,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101693720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:04:38,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:04:38,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 23:04:38,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008115127] [2021-12-06 23:04:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:04:38,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:04:38,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:04:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:04:38,034 INFO L87 Difference]: Start difference. First operand 743 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:04:40,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:42,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:44,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:46,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:48,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:50,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:52,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:54,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:56,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:04:58,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:01,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:13,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:05:14,967 INFO L93 Difference]: Finished difference Result 1571 states and 2394 transitions. [2021-12-06 23:05:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 23:05:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2021-12-06 23:05:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:05:14,972 INFO L225 Difference]: With dead ends: 1571 [2021-12-06 23:05:14,972 INFO L226 Difference]: Without dead ends: 1401 [2021-12-06 23:05:14,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=260, Invalid=1720, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:05:14,974 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 806 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 403 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 4106 SdHoareTripleChecker+Invalid, 3732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:05:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 4106 Invalid, 3732 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [403 Valid, 3317 Invalid, 12 Unknown, 0 Unchecked, 35.0s Time] [2021-12-06 23:05:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-12-06 23:05:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1108. [2021-12-06 23:05:15,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 799 states have (on average 1.2227784730913642) internal successors, (977), 823 states have internal predecessors, (977), 235 states have call successors, (235), 72 states have call predecessors, (235), 73 states have return successors, (267), 216 states have call predecessors, (267), 231 states have call successors, (267) [2021-12-06 23:05:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1479 transitions. [2021-12-06 23:05:15,074 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1479 transitions. Word has length 176 [2021-12-06 23:05:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:05:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1479 transitions. [2021-12-06 23:05:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:05:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1479 transitions. [2021-12-06 23:05:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 23:05:15,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:05:15,076 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:05:15,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-06 23:05:15,077 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:05:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:05:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 849539567, now seen corresponding path program 1 times [2021-12-06 23:05:15,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:05:15,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818150301] [2021-12-06 23:05:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:05:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:05:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:05:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:05:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:05:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:05:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:05:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:05:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-06 23:05:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:17,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 23:05:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 23:05:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-06 23:05:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2021-12-06 23:05:18,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:05:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818150301] [2021-12-06 23:05:18,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818150301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:05:18,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:05:18,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-06 23:05:18,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494731857] [2021-12-06 23:05:18,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:05:18,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:05:18,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:05:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:05:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:05:18,125 INFO L87 Difference]: Start difference. First operand 1108 states and 1479 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:05:20,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:22,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:24,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:26,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:28,788 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:30,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:32,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:35,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:50,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:52,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:05:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:05:53,594 INFO L93 Difference]: Finished difference Result 1262 states and 1823 transitions. [2021-12-06 23:05:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 23:05:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2021-12-06 23:05:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:05:53,598 INFO L225 Difference]: With dead ends: 1262 [2021-12-06 23:05:53,598 INFO L226 Difference]: Without dead ends: 1082 [2021-12-06 23:05:53,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:05:53,600 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 605 mSDsluCounter, 4756 mSDsCounter, 0 mSdLazyCounter, 4320 mSolverCounterSat, 307 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 5377 SdHoareTripleChecker+Invalid, 4637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 4320 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:05:53,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 5377 Invalid, 4637 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [307 Valid, 4320 Invalid, 10 Unknown, 0 Unchecked, 33.5s Time] [2021-12-06 23:05:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-12-06 23:05:53,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 451. [2021-12-06 23:05:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 345 states have (on average 1.1623188405797102) internal successors, (401), 351 states have internal predecessors, (401), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (80), 67 states have call predecessors, (80), 70 states have call successors, (80) [2021-12-06 23:05:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 554 transitions. [2021-12-06 23:05:53,650 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 554 transitions. Word has length 176 [2021-12-06 23:05:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:05:53,650 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 554 transitions. [2021-12-06 23:05:53,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-06 23:05:53,650 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 554 transitions. [2021-12-06 23:05:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 23:05:53,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:05:53,651 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:05:53,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-06 23:05:53,652 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:05:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:05:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2100552038, now seen corresponding path program 1 times [2021-12-06 23:05:53,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:05:53,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144410525] [2021-12-06 23:05:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:05:53,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:05:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-06 23:05:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:05:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:05:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:05:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:05:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:05:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 23:05:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-06 23:05:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:56,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:05:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:56,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 23:05:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:56,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-06 23:05:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:56,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-06 23:05:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:05:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2021-12-06 23:05:56,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:05:56,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144410525] [2021-12-06 23:05:56,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144410525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:05:56,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:05:56,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 23:05:56,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359969774] [2021-12-06 23:05:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:05:56,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:05:56,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:05:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:05:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:05:56,253 INFO L87 Difference]: Start difference. First operand 451 states and 554 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 23:05:58,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []