./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/cdaudio.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_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/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_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/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_6981cb44-cded-4a2e-b7ed-c16536b78627/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 ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:56:36,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:56:36,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:56:37,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:56:37,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:56:37,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:56:37,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:56:37,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:56:37,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:56:37,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:56:37,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:56:37,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:56:37,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:56:37,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:56:37,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:56:37,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:56:37,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:56:37,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:56:37,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:56:37,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:56:37,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:56:37,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:56:37,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:56:37,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:56:37,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:56:37,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:56:37,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:56:37,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:56:37,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:56:37,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:56:37,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:56:37,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:56:37,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:56:37,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:56:37,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:56:37,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:56:37,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:56:37,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:56:37,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:56:37,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:56:37,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:56:37,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:56:37,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:56:37,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:56:37,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:56:37,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:56:37,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:56:37,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:56:37,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:56:37,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:56:37,085 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:56:37,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:56:37,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:56:37,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:56:37,086 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:56:37,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:56:37,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:56:37,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:56:37,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:56:37,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:56:37,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:56:37,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:56:37,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:56:37,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:56:37,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:56:37,088 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:56:37,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:56:37,089 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:56:37,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:56:37,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:56:37,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:56:37,089 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_6981cb44-cded-4a2e-b7ed-c16536b78627/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2021-12-06 23:56:37,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:56:37,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:56:37,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:56:37,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:56:37,293 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:56:37,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-06 23:56:37,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/data/622c069e2/1b4152c1ea4845468bbaac813fb2a64a/FLAG6f997d1be [2021-12-06 23:56:37,990 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:56:37,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-06 23:56:38,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/data/622c069e2/1b4152c1ea4845468bbaac813fb2a64a/FLAG6f997d1be [2021-12-06 23:56:38,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/data/622c069e2/1b4152c1ea4845468bbaac813fb2a64a [2021-12-06 23:56:38,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:56:38,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:56:38,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:56:38,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:56:38,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:56:38,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:56:38" (1/1) ... [2021-12-06 23:56:38,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519cabb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:38, skipping insertion in model container [2021-12-06 23:56:38,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:56:38" (1/1) ... [2021-12-06 23:56:38,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:56:38,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:56:38,706 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_6981cb44-cded-4a2e-b7ed-c16536b78627/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2021-12-06 23:56:39,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:56:39,143 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:56:39,192 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_6981cb44-cded-4a2e-b7ed-c16536b78627/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2021-12-06 23:56:39,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:56:39,439 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:56:39,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39 WrapperNode [2021-12-06 23:56:39,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:56:39,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:56:39,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:56:39,440 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:56:39,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,584 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2021-12-06 23:56:39,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:56:39,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:56:39,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:56:39,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:56:39,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:56:39,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:56:39,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:56:39,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:56:39,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (1/1) ... [2021-12-06 23:56:39,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:56:39,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:56:39,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:56:39,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:56:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 23:56:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 23:56:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-06 23:56:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-06 23:56:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 23:56:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-06 23:56:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-06 23:56:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-06 23:56:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-06 23:56:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:56:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-06 23:56:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-06 23:56:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-06 23:56:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-06 23:56:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-06 23:56:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:56:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-06 23:56:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-06 23:56:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 23:56:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-06 23:56:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-06 23:56:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:56:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:56:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-06 23:56:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-06 23:56:40,014 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:56:40,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:56:40,135 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,147 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-06 23:56:40,147 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-06 23:56:40,524 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,542 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-06 23:56:40,542 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-06 23:56:40,559 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,560 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,562 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,571 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,582 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:40,589 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:49,864 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2021-12-06 23:56:49,865 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2021-12-06 23:56:49,866 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2021-12-06 23:56:49,866 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2021-12-06 23:56:49,890 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-06 23:56:49,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-06 23:56:49,893 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-06 23:56:49,903 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:56:49,914 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:56:49,914 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-06 23:56:49,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:56:49 BoogieIcfgContainer [2021-12-06 23:56:49,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:56:49,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:56:49,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:56:49,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:56:49,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:56:38" (1/3) ... [2021-12-06 23:56:49,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baea3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:56:49, skipping insertion in model container [2021-12-06 23:56:49,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:56:39" (2/3) ... [2021-12-06 23:56:49,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baea3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:56:49, skipping insertion in model container [2021-12-06 23:56:49,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:56:49" (3/3) ... [2021-12-06 23:56:49,922 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2021-12-06 23:56:49,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:56:49,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:56:49,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:56:49,968 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 23:56:49,968 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:56:49,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-12-06 23:56:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 23:56:49,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:49,998 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 23:56:49,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2021-12-06 23:56:50,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:50,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979018946] [2021-12-06 23:56:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:50,272 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 23:56:50,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979018946] [2021-12-06 23:56:50,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979018946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:50,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:50,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:50,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268180965] [2021-12-06 23:56:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:50,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:50,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:50,310 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 23:56:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:50,452 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2021-12-06 23:56:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 23:56:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:50,466 INFO L225 Difference]: With dead ends: 1237 [2021-12-06 23:56:50,466 INFO L226 Difference]: Without dead ends: 610 [2021-12-06 23:56:50,473 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 23:56:50,475 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:50,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:56:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-06 23:56:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-12-06 23:56:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-06 23:56:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2021-12-06 23:56:50,546 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2021-12-06 23:56:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:50,546 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2021-12-06 23:56:50,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 23:56:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2021-12-06 23:56:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 23:56:50,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:50,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:50,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:56:50,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2021-12-06 23:56:50,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422424769] [2021-12-06 23:56:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:50,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:50,683 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 23:56:50,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:50,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422424769] [2021-12-06 23:56:50,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422424769] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:50,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:50,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:50,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935572689] [2021-12-06 23:56:50,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:50,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:50,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:50,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:50,687 INFO L87 Difference]: Start difference. First operand 610 states and 920 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 23:56:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:50,828 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2021-12-06 23:56:50,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:50,828 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 21 [2021-12-06 23:56:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:50,838 INFO L225 Difference]: With dead ends: 1123 [2021-12-06 23:56:50,838 INFO L226 Difference]: Without dead ends: 882 [2021-12-06 23:56:50,840 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 23:56:50,841 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1653 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:56:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-06 23:56:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2021-12-06 23:56:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2021-12-06 23:56:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2021-12-06 23:56:50,887 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2021-12-06 23:56:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:50,887 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2021-12-06 23:56:50,887 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 23:56:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2021-12-06 23:56:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:56:50,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:50,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:50,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:56:50,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2021-12-06 23:56:50,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:50,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070651826] [2021-12-06 23:56:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:50,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:50,980 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 23:56:50,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070651826] [2021-12-06 23:56:50,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070651826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:50,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:50,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:50,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433175456] [2021-12-06 23:56:50,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:50,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:50,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:50,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:50,983 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 23:56:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:51,124 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2021-12-06 23:56:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2021-12-06 23:56:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:51,134 INFO L225 Difference]: With dead ends: 1823 [2021-12-06 23:56:51,134 INFO L226 Difference]: Without dead ends: 1428 [2021-12-06 23:56:51,135 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 23:56:51,137 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:51,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:56:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-06 23:56:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2021-12-06 23:56:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2021-12-06 23:56:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2021-12-06 23:56:51,195 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2021-12-06 23:56:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:51,196 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2021-12-06 23:56:51,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 23:56:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2021-12-06 23:56:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:56:51,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:51,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:51,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:56:51,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2021-12-06 23:56:51,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:51,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521080952] [2021-12-06 23:56:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:51,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:51,334 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 23:56:51,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:51,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521080952] [2021-12-06 23:56:51,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521080952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:51,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:51,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:51,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444938083] [2021-12-06 23:56:51,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:51,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:51,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:51,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:51,336 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 23:56:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:51,387 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2021-12-06 23:56:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2021-12-06 23:56:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:51,395 INFO L225 Difference]: With dead ends: 1670 [2021-12-06 23:56:51,395 INFO L226 Difference]: Without dead ends: 1538 [2021-12-06 23:56:51,397 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 23:56:51,397 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:51,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-06 23:56:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2021-12-06 23:56:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2021-12-06 23:56:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2021-12-06 23:56:51,455 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2021-12-06 23:56:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:51,456 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2021-12-06 23:56:51,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 23:56:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2021-12-06 23:56:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:56:51,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:51,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:51,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 23:56:51,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2021-12-06 23:56:51,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684158419] [2021-12-06 23:56:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:51,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:51,533 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 23:56:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:51,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684158419] [2021-12-06 23:56:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684158419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:51,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:51,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:56:51,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610483598] [2021-12-06 23:56:51,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:51,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:56:51,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:56:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:56:51,534 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 23:56:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:52,002 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2021-12-06 23:56:52,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:56:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 29 [2021-12-06 23:56:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:52,015 INFO L225 Difference]: With dead ends: 2654 [2021-12-06 23:56:52,015 INFO L226 Difference]: Without dead ends: 1775 [2021-12-06 23:56:52,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:56:52,019 INFO L933 BasicCegarLoop]: 1157 mSDtfsCounter, 1415 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:52,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 1469 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:56:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-12-06 23:56:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2021-12-06 23:56:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-06 23:56:52,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2021-12-06 23:56:52,095 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2021-12-06 23:56:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:52,095 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2021-12-06 23:56:52,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 23:56:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2021-12-06 23:56:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:56:52,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:52,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:52,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:56:52,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2021-12-06 23:56:52,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100243287] [2021-12-06 23:56:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:52,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:52,153 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 23:56:52,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:52,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100243287] [2021-12-06 23:56:52,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100243287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:52,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:52,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:56:52,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622560361] [2021-12-06 23:56:52,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:52,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:56:52,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:52,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:56:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:56:52,155 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 23:56:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:56:52,231 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2021-12-06 23:56:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:56:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 28 [2021-12-06 23:56:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:56:52,239 INFO L225 Difference]: With dead ends: 1468 [2021-12-06 23:56:52,239 INFO L226 Difference]: Without dead ends: 1464 [2021-12-06 23:56:52,240 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 23:56:52,241 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:56:52,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:56:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-12-06 23:56:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2021-12-06 23:56:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2021-12-06 23:56:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2021-12-06 23:56:52,311 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2021-12-06 23:56:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:56:52,311 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2021-12-06 23:56:52,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 23:56:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2021-12-06 23:56:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:56:52,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:56:52,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:56:52,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:56:52,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:56:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:56:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2021-12-06 23:56:52,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:56:52,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382788730] [2021-12-06 23:56:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:56:52,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:56:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:52,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:56:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:56:52,407 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 23:56:52,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:56:52,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382788730] [2021-12-06 23:56:52,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382788730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:56:52,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:56:52,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:56:52,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909339922] [2021-12-06 23:56:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:56:52,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:56:52,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:56:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:56:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:56:52,408 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:56:54,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:56:58,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:00,810 WARN L534 Checker$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 23:57:02,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:05,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:05,810 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2021-12-06 23:57:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:57:05,813 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-12-06 23:57:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:05,820 INFO L225 Difference]: With dead ends: 2260 [2021-12-06 23:57:05,820 INFO L226 Difference]: Without dead ends: 1239 [2021-12-06 23:57:05,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:57:05,822 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 793 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:05,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2540 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 456 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-12-06 23:57:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-06 23:57:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2021-12-06 23:57:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-06 23:57:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2021-12-06 23:57:05,870 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2021-12-06 23:57:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:05,870 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2021-12-06 23:57:05,870 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:57:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2021-12-06 23:57:05,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 23:57:05,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:05,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:05,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 23:57:05,872 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:05,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:05,873 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2021-12-06 23:57:05,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:05,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131415224] [2021-12-06 23:57:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:05,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:05,936 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 23:57:05,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:05,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131415224] [2021-12-06 23:57:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131415224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:05,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:05,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:05,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027360128] [2021-12-06 23:57:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:05,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:05,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:05,938 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 23:57:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:06,242 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2021-12-06 23:57:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 37 [2021-12-06 23:57:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:06,249 INFO L225 Difference]: With dead ends: 1158 [2021-12-06 23:57:06,249 INFO L226 Difference]: Without dead ends: 1114 [2021-12-06 23:57:06,249 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 23:57:06,250 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 912 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:06,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1526 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:57:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-12-06 23:57:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2021-12-06 23:57:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2021-12-06 23:57:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2021-12-06 23:57:06,309 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2021-12-06 23:57:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:06,309 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2021-12-06 23:57:06,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 23:57:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2021-12-06 23:57:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:57:06,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:06,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:06,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:57:06,312 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:06,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2021-12-06 23:57:06,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:06,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843070662] [2021-12-06 23:57:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:06,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:06,388 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 23:57:06,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:06,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843070662] [2021-12-06 23:57:06,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843070662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:06,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:06,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:06,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326658176] [2021-12-06 23:57:06,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:06,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:06,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:06,390 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 23:57:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:06,682 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2021-12-06 23:57:06,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2021-12-06 23:57:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:06,691 INFO L225 Difference]: With dead ends: 1148 [2021-12-06 23:57:06,691 INFO L226 Difference]: Without dead ends: 1076 [2021-12-06 23:57:06,692 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 23:57:06,693 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 893 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:06,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1525 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:57:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-12-06 23:57:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2021-12-06 23:57:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-06 23:57:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2021-12-06 23:57:06,747 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2021-12-06 23:57:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:06,747 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2021-12-06 23:57:06,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 23:57:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2021-12-06 23:57:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:57:06,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:06,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:06,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:57:06,749 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:06,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2021-12-06 23:57:06,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:06,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235256322] [2021-12-06 23:57:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:06,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:06,838 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 23:57:06,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235256322] [2021-12-06 23:57:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235256322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:06,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:06,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:06,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996603432] [2021-12-06 23:57:06,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:06,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:06,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:06,839 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 23:57:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:07,206 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2021-12-06 23:57:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:07,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2021-12-06 23:57:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:07,213 INFO L225 Difference]: With dead ends: 1358 [2021-12-06 23:57:07,213 INFO L226 Difference]: Without dead ends: 1349 [2021-12-06 23:57:07,214 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 23:57:07,214 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1143 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:07,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1819 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:57:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-12-06 23:57:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2021-12-06 23:57:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-06 23:57:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2021-12-06 23:57:07,260 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2021-12-06 23:57:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:07,261 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2021-12-06 23:57:07,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 23:57:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2021-12-06 23:57:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:57:07,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:07,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:07,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 23:57:07,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2021-12-06 23:57:07,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471102526] [2021-12-06 23:57:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:07,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:07,331 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 23:57:07,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:07,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471102526] [2021-12-06 23:57:07,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471102526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:07,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:07,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:07,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154861669] [2021-12-06 23:57:07,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:07,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:07,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:07,333 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 23:57:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:07,393 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2021-12-06 23:57:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2021-12-06 23:57:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:07,401 INFO L225 Difference]: With dead ends: 1192 [2021-12-06 23:57:07,401 INFO L226 Difference]: Without dead ends: 1164 [2021-12-06 23:57:07,402 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 23:57:07,403 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:07,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:07,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-06 23:57:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2021-12-06 23:57:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-06 23:57:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2021-12-06 23:57:07,473 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2021-12-06 23:57:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:07,473 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2021-12-06 23:57:07,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 23:57:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2021-12-06 23:57:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:57:07,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:07,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:57:07,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2021-12-06 23:57:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105776137] [2021-12-06 23:57:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:07,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:07,529 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 23:57:07,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105776137] [2021-12-06 23:57:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105776137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:07,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:07,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:57:07,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651249847] [2021-12-06 23:57:07,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:07,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:57:07,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:57:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:57:07,531 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 23:57:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:07,615 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2021-12-06 23:57:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:57:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2021-12-06 23:57:07,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:07,622 INFO L225 Difference]: With dead ends: 1402 [2021-12-06 23:57:07,622 INFO L226 Difference]: Without dead ends: 1389 [2021-12-06 23:57:07,623 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 23:57:07,623 INFO L933 BasicCegarLoop]: 1170 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:07,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 1982 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-12-06 23:57:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2021-12-06 23:57:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-06 23:57:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2021-12-06 23:57:07,679 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2021-12-06 23:57:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:07,679 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2021-12-06 23:57:07,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 23:57:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2021-12-06 23:57:07,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 23:57:07,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:07,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:07,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 23:57:07,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2021-12-06 23:57:07,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174655512] [2021-12-06 23:57:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:07,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:07,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:57:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:07,760 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 23:57:07,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:07,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174655512] [2021-12-06 23:57:07,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174655512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:07,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:07,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:57:07,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941634794] [2021-12-06 23:57:07,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:07,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:57:07,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:57:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:57:07,761 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:57:11,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:14,151 WARN L534 Checker$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 23:57:16,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:18,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:20,338 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 23:57:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:20,408 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2021-12-06 23:57:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:57:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-12-06 23:57:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:20,418 INFO L225 Difference]: With dead ends: 1761 [2021-12-06 23:57:20,418 INFO L226 Difference]: Without dead ends: 1129 [2021-12-06 23:57:20,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 23:57:20,420 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 910 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 135 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:20,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1246 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 323 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-12-06 23:57:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-06 23:57:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2021-12-06 23:57:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-06 23:57:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2021-12-06 23:57:20,475 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2021-12-06 23:57:20,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:20,475 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2021-12-06 23:57:20,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 23:57:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2021-12-06 23:57:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:57:20,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:20,476 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:20,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:57:20,477 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2021-12-06 23:57:20,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:20,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463622279] [2021-12-06 23:57:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:20,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:20,538 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 23:57:20,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:20,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463622279] [2021-12-06 23:57:20,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463622279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:20,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:20,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:57:20,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630020924] [2021-12-06 23:57:20,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:20,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:57:20,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:57:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:57:20,540 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 23:57:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:20,643 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2021-12-06 23:57:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:57:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 40 [2021-12-06 23:57:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:20,649 INFO L225 Difference]: With dead ends: 1082 [2021-12-06 23:57:20,649 INFO L226 Difference]: Without dead ends: 1054 [2021-12-06 23:57:20,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:57:20,650 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:20,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:57:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-06 23:57:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2021-12-06 23:57:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2021-12-06 23:57:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2021-12-06 23:57:20,705 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2021-12-06 23:57:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2021-12-06 23:57:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 23:57:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2021-12-06 23:57:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 23:57:20,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:20,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:20,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 23:57:20,708 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2021-12-06 23:57:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588215520] [2021-12-06 23:57:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:57:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 23:57:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:20,784 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 23:57:20,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:20,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588215520] [2021-12-06 23:57:20,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588215520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:20,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:20,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:57:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053166327] [2021-12-06 23:57:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:20,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:57:20,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:57:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:20,785 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:57:24,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:28,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:30,329 WARN L534 Checker$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 23:57:31,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:31,871 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2021-12-06 23:57:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:57:31,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-06 23:57:31,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:31,879 INFO L225 Difference]: With dead ends: 1720 [2021-12-06 23:57:31,879 INFO L226 Difference]: Without dead ends: 1185 [2021-12-06 23:57:31,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:57:31,881 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 594 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 264 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:31,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 2385 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 572 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2021-12-06 23:57:31,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-06 23:57:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2021-12-06 23:57:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-06 23:57:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2021-12-06 23:57:31,925 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2021-12-06 23:57:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:31,925 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2021-12-06 23:57:31,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:57:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2021-12-06 23:57:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 23:57:31,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:31,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:31,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 23:57:31,927 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:31,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2021-12-06 23:57:31,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061945081] [2021-12-06 23:57:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:31,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:31,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:57:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:31,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:32,003 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 23:57:32,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061945081] [2021-12-06 23:57:32,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061945081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:32,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:32,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:57:32,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482522834] [2021-12-06 23:57:32,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:32,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:57:32,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:57:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:32,005 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:57:36,137 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:38,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:39,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:41,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:43,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:44,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:44,707 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2021-12-06 23:57:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:57:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-12-06 23:57:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:44,718 INFO L225 Difference]: With dead ends: 1133 [2021-12-06 23:57:44,718 INFO L226 Difference]: Without dead ends: 1105 [2021-12-06 23:57:44,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 23:57:44,720 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 280 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 253 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:44,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2457 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 583 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2021-12-06 23:57:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-12-06 23:57:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2021-12-06 23:57:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 809 states have (on average 1.4239802224969098) internal successors, (1152), 816 states have internal predecessors, (1152), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-06 23:57:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2021-12-06 23:57:44,789 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2021-12-06 23:57:44,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:44,789 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2021-12-06 23:57:44,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:57:44,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2021-12-06 23:57:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 23:57:44,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:44,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:44,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 23:57:44,792 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2021-12-06 23:57:44,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:44,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589305445] [2021-12-06 23:57:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:44,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:57:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:57:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:44,905 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 23:57:44,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:44,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589305445] [2021-12-06 23:57:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589305445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:44,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:57:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803167788] [2021-12-06 23:57:44,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:44,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:57:44,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:57:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:44,907 INFO L87 Difference]: Start difference. First operand 1022 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 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 23:57:49,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:53,520 WARN L534 Checker$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 23:57:54,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:56,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:57:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:57:56,661 INFO L93 Difference]: Finished difference Result 1104 states and 1653 transitions. [2021-12-06 23:57:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:57:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 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 49 [2021-12-06 23:57:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:57:56,669 INFO L225 Difference]: With dead ends: 1104 [2021-12-06 23:57:56,669 INFO L226 Difference]: Without dead ends: 1097 [2021-12-06 23:57:56,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:57:56,670 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 264 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 241 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:57:56,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2390 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2021-12-06 23:57:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-12-06 23:57:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1034. [2021-12-06 23:57:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 821 states have (on average 1.4202192448233861) internal successors, (1166), 828 states have internal predecessors, (1166), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2021-12-06 23:57:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1534 transitions. [2021-12-06 23:57:56,722 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1534 transitions. Word has length 49 [2021-12-06 23:57:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:57:56,722 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1534 transitions. [2021-12-06 23:57:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 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 23:57:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1534 transitions. [2021-12-06 23:57:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 23:57:56,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:57:56,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:57:56,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:57:56,725 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:57:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:57:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 725085215, now seen corresponding path program 1 times [2021-12-06 23:57:56,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:57:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667657231] [2021-12-06 23:57:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:57:56,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:57:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:57:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:57:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:57:56,794 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 23:57:56,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:57:56,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667657231] [2021-12-06 23:57:56,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667657231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:57:56,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:57:56,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:57:56,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001906869] [2021-12-06 23:57:56,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:57:56,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:57:56,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:57:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:57:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:57:56,795 INFO L87 Difference]: Start difference. First operand 1034 states and 1534 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:57:58,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:01,852 WARN L534 Checker$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 23:58:04,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:06,779 WARN L534 Checker$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 23:58:08,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:10,954 WARN L534 Checker$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 23:58:12,978 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 23:58:13,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:13,063 INFO L93 Difference]: Finished difference Result 1172 states and 1735 transitions. [2021-12-06 23:58:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:58:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2021-12-06 23:58:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:13,071 INFO L225 Difference]: With dead ends: 1172 [2021-12-06 23:58:13,071 INFO L226 Difference]: Without dead ends: 1098 [2021-12-06 23:58:13,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:58:13,072 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 882 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 281 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:13,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 2069 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 541 Invalid, 6 Unknown, 0 Unchecked, 16.2s Time] [2021-12-06 23:58:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-12-06 23:58:13,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1023. [2021-12-06 23:58:13,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4213759213759214) internal successors, (1157), 821 states have internal predecessors, (1157), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2021-12-06 23:58:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1521 transitions. [2021-12-06 23:58:13,114 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1521 transitions. Word has length 50 [2021-12-06 23:58:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:13,114 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1521 transitions. [2021-12-06 23:58:13,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:58:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1521 transitions. [2021-12-06 23:58:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 23:58:13,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:13,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:13,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:58:13,116 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1407456133, now seen corresponding path program 1 times [2021-12-06 23:58:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624129150] [2021-12-06 23:58:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:58:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:13,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:13,208 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 23:58:13,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:13,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624129150] [2021-12-06 23:58:13,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624129150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:13,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:13,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 23:58:13,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400775114] [2021-12-06 23:58:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:13,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:58:13,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:58:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:58:13,210 INFO L87 Difference]: Start difference. First operand 1023 states and 1521 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 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 23:58:18,061 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 23:58:19,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:22,827 WARN L534 Checker$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 23:58:24,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:26,127 WARN L534 Checker$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 23:58:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:26,242 INFO L93 Difference]: Finished difference Result 1093 states and 1636 transitions. [2021-12-06 23:58:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:58:26,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 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 50 [2021-12-06 23:58:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:26,253 INFO L225 Difference]: With dead ends: 1093 [2021-12-06 23:58:26,253 INFO L226 Difference]: Without dead ends: 1088 [2021-12-06 23:58:26,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:58:26,254 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 1094 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 297 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 2849 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:26,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1184 Valid, 2849 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1059 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2021-12-06 23:58:26,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-12-06 23:58:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1023. [2021-12-06 23:58:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4201474201474202) internal successors, (1156), 821 states have internal predecessors, (1156), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2021-12-06 23:58:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1520 transitions. [2021-12-06 23:58:26,307 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1520 transitions. Word has length 50 [2021-12-06 23:58:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1520 transitions. [2021-12-06 23:58:26,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 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 23:58:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1520 transitions. [2021-12-06 23:58:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 23:58:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:26,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:58:26,310 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1869145587, now seen corresponding path program 1 times [2021-12-06 23:58:26,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:26,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355170422] [2021-12-06 23:58:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:26,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:26,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-06 23:58:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 23:58:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:26,437 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 23:58:26,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:26,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355170422] [2021-12-06 23:58:26,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355170422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:26,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:26,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 23:58:26,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876151505] [2021-12-06 23:58:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:26,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:58:26,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:58:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:58:26,439 INFO L87 Difference]: Start difference. First operand 1023 states and 1520 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 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 23:58:34,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:37,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:39,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:41,809 WARN L534 Checker$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 23:58:43,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:43,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:43,656 INFO L93 Difference]: Finished difference Result 1075 states and 1608 transitions. [2021-12-06 23:58:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:58:43,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 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 51 [2021-12-06 23:58:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:43,664 INFO L225 Difference]: With dead ends: 1075 [2021-12-06 23:58:43,664 INFO L226 Difference]: Without dead ends: 1060 [2021-12-06 23:58:43,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:58:43,665 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 90 mSDsluCounter, 5250 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 103 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6087 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:43,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6087 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1571 Invalid, 3 Unknown, 0 Unchecked, 17.1s Time] [2021-12-06 23:58:43,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-12-06 23:58:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1021. [2021-12-06 23:58:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 813 states have (on average 1.4194341943419435) internal successors, (1154), 820 states have internal predecessors, (1154), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2021-12-06 23:58:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1516 transitions. [2021-12-06 23:58:43,710 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1516 transitions. Word has length 51 [2021-12-06 23:58:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:43,710 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1516 transitions. [2021-12-06 23:58:43,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 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 23:58:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1516 transitions. [2021-12-06 23:58:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 23:58:43,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:43,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:43,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:58:43,712 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:43,713 INFO L85 PathProgramCache]: Analyzing trace with hash -956966013, now seen corresponding path program 1 times [2021-12-06 23:58:43,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:43,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256724618] [2021-12-06 23:58:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:43,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:43,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:58:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-06 23:58:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:43,782 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 23:58:43,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256724618] [2021-12-06 23:58:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256724618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:58:43,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:58:43,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:58:43,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997132186] [2021-12-06 23:58:43,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:58:43,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:58:43,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:58:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:58:43,783 INFO L87 Difference]: Start difference. First operand 1021 states and 1516 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:58:46,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:49,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:58:53,916 WARN L534 Checker$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 23:58:56,058 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 23:58:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:58:56,575 INFO L93 Difference]: Finished difference Result 2105 states and 3145 transitions. [2021-12-06 23:58:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:58:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-12-06 23:58:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:58:56,583 INFO L225 Difference]: With dead ends: 2105 [2021-12-06 23:58:56,584 INFO L226 Difference]: Without dead ends: 1088 [2021-12-06 23:58:56,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 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 23:58:56,586 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 235 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 236 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:58:56,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 2482 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 573 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-12-06 23:58:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-12-06 23:58:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1024. [2021-12-06 23:58:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 816 states have (on average 1.4178921568627452) internal successors, (1157), 823 states have internal predecessors, (1157), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2021-12-06 23:58:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1519 transitions. [2021-12-06 23:58:56,660 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1519 transitions. Word has length 51 [2021-12-06 23:58:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:58:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1519 transitions. [2021-12-06 23:58:56,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 23:58:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1519 transitions. [2021-12-06 23:58:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 23:58:56,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:58:56,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:58:56,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 23:58:56,663 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:58:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:58:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2021-12-06 23:58:56,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:58:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245499528] [2021-12-06 23:58:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:56,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:58:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:56,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:58:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 23:58:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:58:56,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:58:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245499528] [2021-12-06 23:58:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245499528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:58:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046161961] [2021-12-06 23:58:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:58:56,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:58:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:58:56,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:58:56,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:58:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:58:57,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:58:57,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:58:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:58:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:58:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:58:57,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046161961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:58:57,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:58:57,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-06 23:58:57,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325876845] [2021-12-06 23:58:57,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:58:57,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:58:57,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:58:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:58:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:58:57,198 INFO L87 Difference]: Start difference. First operand 1024 states and 1519 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:02,143 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 23:59:04,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:07,182 WARN L534 Checker$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 23:59:09,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:11,363 WARN L534 Checker$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 23:59:12,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:59:12,922 INFO L93 Difference]: Finished difference Result 2122 states and 3167 transitions. [2021-12-06 23:59:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:59:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-06 23:59:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:59:12,931 INFO L225 Difference]: With dead ends: 2122 [2021-12-06 23:59:12,931 INFO L226 Difference]: Without dead ends: 1103 [2021-12-06 23:59:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:59:12,933 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 252 mSDsluCounter, 3171 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 256 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 3989 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:59:12,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 3989 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 811 Invalid, 5 Unknown, 0 Unchecked, 15.6s Time] [2021-12-06 23:59:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-12-06 23:59:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1038. [2021-12-06 23:59:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 830 states have (on average 1.4108433734939758) internal successors, (1171), 837 states have internal predecessors, (1171), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2021-12-06 23:59:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1533 transitions. [2021-12-06 23:59:12,982 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1533 transitions. Word has length 57 [2021-12-06 23:59:12,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:12,983 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 1533 transitions. [2021-12-06 23:59:12,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1533 transitions. [2021-12-06 23:59:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:59:12,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:12,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-06 23:59:13,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:59:13,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:13,186 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2021-12-06 23:59:13,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315574385] [2021-12-06 23:59:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:13,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:59:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 23:59:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 23:59:13,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:13,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315574385] [2021-12-06 23:59:13,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315574385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:13,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725258359] [2021-12-06 23:59:13,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:59:13,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:13,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:13,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:13,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:59:13,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 23:59:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:59:13,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:13,748 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 23:59:13,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:59:13,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725258359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:59:13,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:59:13,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-06 23:59:13,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091820561] [2021-12-06 23:59:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:59:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:59:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:59:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:59:13,749 INFO L87 Difference]: Start difference. First operand 1038 states and 1533 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:59:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:59:13,834 INFO L93 Difference]: Finished difference Result 1796 states and 2713 transitions. [2021-12-06 23:59:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:59:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2021-12-06 23:59:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:59:13,838 INFO L225 Difference]: With dead ends: 1796 [2021-12-06 23:59:13,838 INFO L226 Difference]: Without dead ends: 1047 [2021-12-06 23:59:13,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:59:13,841 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 2 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:59:13,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2520 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:59:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-12-06 23:59:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1047. [2021-12-06 23:59:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 837 states have (on average 1.4097968936678613) internal successors, (1180), 846 states have internal predecessors, (1180), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2021-12-06 23:59:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1544 transitions. [2021-12-06 23:59:13,919 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1544 transitions. Word has length 71 [2021-12-06 23:59:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:13,919 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1544 transitions. [2021-12-06 23:59:13,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:59:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1544 transitions. [2021-12-06 23:59:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:59:13,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:13,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-06 23:59:13,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:59:14,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:14,123 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2021-12-06 23:59:14,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157754974] [2021-12-06 23:59:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:14,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 23:59:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:14,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 23:59:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:59:14,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157754974] [2021-12-06 23:59:14,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157754974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:14,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850548208] [2021-12-06 23:59:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:14,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:14,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:14,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:14,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:59:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 23:59:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:59:14,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 23:59:14,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850548208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:14,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:14,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2021-12-06 23:59:14,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814440601] [2021-12-06 23:59:14,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:14,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:59:14,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:59:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:59:14,898 INFO L87 Difference]: Start difference. First operand 1047 states and 1544 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:18,699 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 23:59:24,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:28,163 WARN L534 Checker$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 23:59:29,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:31,905 WARN L534 Checker$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 23:59:33,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:33,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:59:33,261 INFO L93 Difference]: Finished difference Result 2155 states and 3185 transitions. [2021-12-06 23:59:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:59:33,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2021-12-06 23:59:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:59:33,267 INFO L225 Difference]: With dead ends: 2155 [2021-12-06 23:59:33,268 INFO L226 Difference]: Without dead ends: 1119 [2021-12-06 23:59:33,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:59:33,270 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 308 mSDsluCounter, 6957 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 298 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 7774 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:59:33,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 7774 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1453 Invalid, 4 Unknown, 0 Unchecked, 17.9s Time] [2021-12-06 23:59:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-12-06 23:59:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1067. [2021-12-06 23:59:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 857 states have (on average 1.4002333722287048) internal successors, (1200), 866 states have internal predecessors, (1200), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2021-12-06 23:59:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1564 transitions. [2021-12-06 23:59:33,315 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1564 transitions. Word has length 72 [2021-12-06 23:59:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1564 transitions. [2021-12-06 23:59:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 13 states have internal predecessors, (97), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1564 transitions. [2021-12-06 23:59:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 23:59:33,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:33,317 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:59:33,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:59:33,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:33,518 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash 351198032, now seen corresponding path program 2 times [2021-12-06 23:59:33,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:33,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389784661] [2021-12-06 23:59:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:33,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 23:59:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-06 23:59:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 23:59:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389784661] [2021-12-06 23:59:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389784661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887120768] [2021-12-06 23:59:33,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:59:33,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:33,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:59:34,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:59:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:59:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 23:59:34,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 23:59:34,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887120768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:34,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:34,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2021-12-06 23:59:34,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488375010] [2021-12-06 23:59:34,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:34,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:59:34,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:59:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:59:34,617 INFO L87 Difference]: Start difference. First operand 1067 states and 1564 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:38,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:43,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:45,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:46,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:59:49,881 WARN L534 Checker$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 23:59:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:59:49,962 INFO L93 Difference]: Finished difference Result 2191 states and 3220 transitions. [2021-12-06 23:59:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:59:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 92 [2021-12-06 23:59:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:59:49,968 INFO L225 Difference]: With dead ends: 2191 [2021-12-06 23:59:49,968 INFO L226 Difference]: Without dead ends: 1137 [2021-12-06 23:59:49,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:59:49,970 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 333 mSDsluCounter, 5449 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 328 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 6267 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:59:49,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 6267 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1338 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2021-12-06 23:59:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-06 23:59:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1087. [2021-12-06 23:59:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 877 states have (on average 1.3911060433295326) internal successors, (1220), 886 states have internal predecessors, (1220), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2021-12-06 23:59:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1584 transitions. [2021-12-06 23:59:50,015 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1584 transitions. Word has length 92 [2021-12-06 23:59:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:59:50,016 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1584 transitions. [2021-12-06 23:59:50,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:59:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1584 transitions. [2021-12-06 23:59:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 23:59:50,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:59:50,018 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:59:50,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 23:59:50,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:50,219 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:59:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:59:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1476489628, now seen corresponding path program 3 times [2021-12-06 23:59:50,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:59:50,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879664165] [2021-12-06 23:59:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:59:50,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:59:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-06 23:59:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:50,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 23:59:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:59:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-06 23:59:50,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:59:50,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879664165] [2021-12-06 23:59:50,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879664165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:59:50,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463258857] [2021-12-06 23:59:50,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:59:50,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:59:50,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:59:50,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:59:50,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:59:51,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 23:59:51,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:59:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:59:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:59:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 23:59:51,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:59:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-12-06 23:59:51,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463258857] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:59:51,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:59:51,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2021-12-06 23:59:51,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528380629] [2021-12-06 23:59:51,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:59:51,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 23:59:51,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:59:51,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 23:59:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:59:51,394 INFO L87 Difference]: Start difference. First operand 1087 states and 1584 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 23:59:58,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:00,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:02,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:05,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:08,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:10,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:10,463 INFO L93 Difference]: Finished difference Result 2245 states and 3309 transitions. [2021-12-07 00:00:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 00:00:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 112 [2021-12-07 00:00:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:10,468 INFO L225 Difference]: With dead ends: 2245 [2021-12-07 00:00:10,469 INFO L226 Difference]: Without dead ends: 1179 [2021-12-07 00:00:10,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:00:10,471 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 308 mSDsluCounter, 6851 mSDsCounter, 0 mSdLazyCounter, 2791 mSolverCounterSat, 342 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 7660 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2791 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:10,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 7660 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2791 Invalid, 4 Unknown, 0 Unchecked, 18.8s Time] [2021-12-07 00:00:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-12-07 00:00:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1126. [2021-12-07 00:00:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 914 states have (on average 1.3884026258205688) internal successors, (1269), 923 states have internal predecessors, (1269), 153 states have call successors, (153), 51 states have call predecessors, (153), 58 states have return successors, (213), 151 states have call predecessors, (213), 147 states have call successors, (213) [2021-12-07 00:00:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1635 transitions. [2021-12-07 00:00:10,530 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1635 transitions. Word has length 112 [2021-12-07 00:00:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:00:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1635 transitions. [2021-12-07 00:00:10,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:00:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1635 transitions. [2021-12-07 00:00:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-07 00:00:10,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:00:10,532 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:10,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:00:10,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 00:00:10,733 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:00:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:10,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1223348179, now seen corresponding path program 1 times [2021-12-07 00:00:10,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:10,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710068029] [2021-12-07 00:00:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:10,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:10,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:00:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:10,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:00:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-07 00:00:10,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:10,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710068029] [2021-12-07 00:00:10,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710068029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:00:10,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:00:10,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-07 00:00:10,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716736030] [2021-12-07 00:00:10,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:00:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:00:10,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:00:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:00:10,900 INFO L87 Difference]: Start difference. First operand 1126 states and 1635 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-12-07 00:00:18,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:21,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:24,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:27,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:27,446 INFO L93 Difference]: Finished difference Result 1166 states and 1688 transitions. [2021-12-07 00:00:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:00:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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 131 [2021-12-07 00:00:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:27,451 INFO L225 Difference]: With dead ends: 1166 [2021-12-07 00:00:27,451 INFO L226 Difference]: Without dead ends: 1151 [2021-12-07 00:00:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:00:27,452 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 90 mSDsluCounter, 5307 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 102 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6135 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:27,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6135 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1454 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2021-12-07 00:00:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-12-07 00:00:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1123. [2021-12-07 00:00:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 912 states have (on average 1.388157894736842) internal successors, (1266), 921 states have internal predecessors, (1266), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2021-12-07 00:00:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1630 transitions. [2021-12-07 00:00:27,505 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1630 transitions. Word has length 131 [2021-12-07 00:00:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:00:27,505 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1630 transitions. [2021-12-07 00:00:27,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-12-07 00:00:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1630 transitions. [2021-12-07 00:00:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-07 00:00:27,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:00:27,507 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:27,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-07 00:00:27,507 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:00:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash -681598516, now seen corresponding path program 1 times [2021-12-07 00:00:27,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:27,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127102499] [2021-12-07 00:00:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:27,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:00:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:27,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:00:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-07 00:00:27,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:27,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127102499] [2021-12-07 00:00:27,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127102499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:00:27,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:00:27,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-07 00:00:27,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797781902] [2021-12-07 00:00:27,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:00:27,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:00:27,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:00:27,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:00:27,677 INFO L87 Difference]: Start difference. First operand 1123 states and 1630 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-12-07 00:00:33,928 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:36,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:38,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:41,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:41,812 INFO L93 Difference]: Finished difference Result 1165 states and 1685 transitions. [2021-12-07 00:00:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:00:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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 132 [2021-12-07 00:00:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:41,817 INFO L225 Difference]: With dead ends: 1165 [2021-12-07 00:00:41,817 INFO L226 Difference]: Without dead ends: 1148 [2021-12-07 00:00:41,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:00:41,818 INFO L933 BasicCegarLoop]: 831 mSDtfsCounter, 101 mSDsluCounter, 6028 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6859 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:41,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 6859 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1612 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2021-12-07 00:00:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-12-07 00:00:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1120. [2021-12-07 00:00:41,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 910 states have (on average 1.3879120879120879) internal successors, (1263), 919 states have internal predecessors, (1263), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2021-12-07 00:00:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1625 transitions. [2021-12-07 00:00:41,865 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1625 transitions. Word has length 132 [2021-12-07 00:00:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:00:41,865 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1625 transitions. [2021-12-07 00:00:41,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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) [2021-12-07 00:00:41,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1625 transitions. [2021-12-07 00:00:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-07 00:00:41,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:00:41,868 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:41,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-07 00:00:41,868 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:00:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2033662210, now seen corresponding path program 1 times [2021-12-07 00:00:41,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:41,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625049052] [2021-12-07 00:00:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:41,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-07 00:00:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:42,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-07 00:00:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:00:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:42,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-07 00:00:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-07 00:00:42,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:42,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625049052] [2021-12-07 00:00:42,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625049052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:00:42,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:00:42,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:00:42,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606523835] [2021-12-07 00:00:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:00:42,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:00:42,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:00:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:00:42,027 INFO L87 Difference]: Start difference. First operand 1120 states and 1625 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 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) [2021-12-07 00:00:46,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:50,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:52,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:54,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:00:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:00:54,989 INFO L93 Difference]: Finished difference Result 1658 states and 2411 transitions. [2021-12-07 00:00:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:00:54,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 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 137 [2021-12-07 00:00:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:00:54,995 INFO L225 Difference]: With dead ends: 1658 [2021-12-07 00:00:54,995 INFO L226 Difference]: Without dead ends: 1167 [2021-12-07 00:00:54,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:00:54,996 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 438 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 348 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 2947 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:00:54,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 2947 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 761 Invalid, 2 Unknown, 0 Unchecked, 12.9s Time] [2021-12-07 00:00:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-12-07 00:00:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1122. [2021-12-07 00:00:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 912 states have (on average 1.3837719298245614) internal successors, (1262), 921 states have internal predecessors, (1262), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (213), 149 states have call predecessors, (213), 145 states have call successors, (213) [2021-12-07 00:00:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1625 transitions. [2021-12-07 00:00:55,044 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1625 transitions. Word has length 137 [2021-12-07 00:00:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:00:55,045 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1625 transitions. [2021-12-07 00:00:55,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 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) [2021-12-07 00:00:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1625 transitions. [2021-12-07 00:00:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-07 00:00:55,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:00:55,047 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:00:55,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-07 00:00:55,047 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:00:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:00:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash 237996309, now seen corresponding path program 4 times [2021-12-07 00:00:55,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:00:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578355660] [2021-12-07 00:00:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:00:55,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:00:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:55,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-07 00:00:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:55,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-07 00:00:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:00:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-12-07 00:00:55,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:00:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578355660] [2021-12-07 00:00:55,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578355660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:00:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094571917] [2021-12-07 00:00:55,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:00:55,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:00:55,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:00:55,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:00:55,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:00:56,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:00:56,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:00:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1340 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:00:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:00:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-07 00:00:56,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:00:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-07 00:00:56,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094571917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:00:56,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:00:56,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 8] total 30 [2021-12-07 00:00:56,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984924367] [2021-12-07 00:00:56,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:00:56,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 00:00:56,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:00:56,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 00:00:56,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:00:56,912 INFO L87 Difference]: Start difference. First operand 1122 states and 1625 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:01:01,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:06,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:09,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:11,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:13,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:16,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:01:18,971 INFO L93 Difference]: Finished difference Result 2334 states and 3438 transitions. [2021-12-07 00:01:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-07 00:01:18,973 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 133 [2021-12-07 00:01:18,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:01:18,976 INFO L225 Difference]: With dead ends: 2334 [2021-12-07 00:01:18,976 INFO L226 Difference]: Without dead ends: 1219 [2021-12-07 00:01:18,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 00:01:18,979 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 342 mSDsluCounter, 10434 mSDsCounter, 0 mSdLazyCounter, 3881 mSolverCounterSat, 410 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 11235 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 3881 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:01:18,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 11235 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 3881 Invalid, 3 Unknown, 0 Unchecked, 21.1s Time] [2021-12-07 00:01:18,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-12-07 00:01:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1155. [2021-12-07 00:01:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 945 states have (on average 1.3873015873015873) internal successors, (1311), 954 states have internal predecessors, (1311), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2021-12-07 00:01:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1672 transitions. [2021-12-07 00:01:19,051 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1672 transitions. Word has length 133 [2021-12-07 00:01:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:01:19,051 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1672 transitions. [2021-12-07 00:01:19,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 28 states have internal predecessors, (119), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:01:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1672 transitions. [2021-12-07 00:01:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 00:01:19,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:01:19,055 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:19,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:01:19,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:01:19,256 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:01:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1320885179, now seen corresponding path program 1 times [2021-12-07 00:01:19,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:19,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182467154] [2021-12-07 00:01:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:19,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:19,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 00:01:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:19,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:01:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-07 00:01:19,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182467154] [2021-12-07 00:01:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182467154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:01:19,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:01:19,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:01:19,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975499876] [2021-12-07 00:01:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:01:19,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:01:19,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:01:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:01:19,468 INFO L87 Difference]: Start difference. First operand 1155 states and 1672 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 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) [2021-12-07 00:01:26,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:28,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:30,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:32,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:35,676 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 [] [2021-12-07 00:01:35,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:01:35,792 INFO L93 Difference]: Finished difference Result 1197 states and 1727 transitions. [2021-12-07 00:01:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:01:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 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 140 [2021-12-07 00:01:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:01:35,797 INFO L225 Difference]: With dead ends: 1197 [2021-12-07 00:01:35,798 INFO L226 Difference]: Without dead ends: 1180 [2021-12-07 00:01:35,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:01:35,798 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 113 mSDsluCounter, 6684 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 99 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 7510 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:01:35,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 7510 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1763 Invalid, 3 Unknown, 0 Unchecked, 16.2s Time] [2021-12-07 00:01:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-07 00:01:35,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1152. [2021-12-07 00:01:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 943 states have (on average 1.3870625662778366) internal successors, (1308), 952 states have internal predecessors, (1308), 149 states have call successors, (149), 51 states have call predecessors, (149), 59 states have return successors, (210), 148 states have call predecessors, (210), 144 states have call successors, (210) [2021-12-07 00:01:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1667 transitions. [2021-12-07 00:01:35,856 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1667 transitions. Word has length 140 [2021-12-07 00:01:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:01:35,856 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1667 transitions. [2021-12-07 00:01:35,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 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) [2021-12-07 00:01:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1667 transitions. [2021-12-07 00:01:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 00:01:35,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:01:35,858 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:35,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-07 00:01:35,858 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:01:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1511993716, now seen corresponding path program 1 times [2021-12-07 00:01:35,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:35,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140163805] [2021-12-07 00:01:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:35,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 00:01:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:36,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 00:01:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-07 00:01:36,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:36,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140163805] [2021-12-07 00:01:36,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140163805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:01:36,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:01:36,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:01:36,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984815362] [2021-12-07 00:01:36,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:01:36,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:01:36,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:01:36,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:01:36,035 INFO L87 Difference]: Start difference. First operand 1152 states and 1667 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 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) [2021-12-07 00:01:42,773 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 [] [2021-12-07 00:01:45,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:49,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:01:51,379 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 [] [2021-12-07 00:01:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:01:51,621 INFO L93 Difference]: Finished difference Result 1194 states and 1722 transitions. [2021-12-07 00:01:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:01:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 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 139 [2021-12-07 00:01:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:01:51,626 INFO L225 Difference]: With dead ends: 1194 [2021-12-07 00:01:51,626 INFO L226 Difference]: Without dead ends: 1177 [2021-12-07 00:01:51,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-12-07 00:01:51,627 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 113 mSDsluCounter, 6585 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 98 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 7395 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:01:51,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 7395 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1747 Invalid, 4 Unknown, 0 Unchecked, 15.5s Time] [2021-12-07 00:01:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-07 00:01:51,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1149. [2021-12-07 00:01:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 941 states have (on average 1.3868225292242295) internal successors, (1305), 950 states have internal predecessors, (1305), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2021-12-07 00:01:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1662 transitions. [2021-12-07 00:01:51,684 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1662 transitions. Word has length 139 [2021-12-07 00:01:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:01:51,684 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1662 transitions. [2021-12-07 00:01:51,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 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) [2021-12-07 00:01:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1662 transitions. [2021-12-07 00:01:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-07 00:01:51,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:01:51,686 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:01:51,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-07 00:01:51,686 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:01:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:01:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 327267077, now seen corresponding path program 1 times [2021-12-07 00:01:51,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:01:51,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109090710] [2021-12-07 00:01:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:01:51,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:01:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-07 00:01:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:51,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:01:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:01:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-07 00:01:51,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:01:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109090710] [2021-12-07 00:01:51,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109090710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:01:51,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:01:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:01:51,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629461162] [2021-12-07 00:01:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:01:51,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:01:51,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:01:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:01:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:01:51,834 INFO L87 Difference]: Start difference. First operand 1149 states and 1662 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:01:56,154 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 [] [2021-12-07 00:01:58,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:00,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:03,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:05,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:07,553 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 [] [2021-12-07 00:02:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:02:07,687 INFO L93 Difference]: Finished difference Result 1240 states and 1776 transitions. [2021-12-07 00:02:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-07 00:02:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2021-12-07 00:02:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:02:07,691 INFO L225 Difference]: With dead ends: 1240 [2021-12-07 00:02:07,691 INFO L226 Difference]: Without dead ends: 1206 [2021-12-07 00:02:07,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:02:07,692 INFO L933 BasicCegarLoop]: 883 mSDtfsCounter, 1073 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 258 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:02:07,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 1900 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 697 Invalid, 6 Unknown, 0 Unchecked, 15.7s Time] [2021-12-07 00:02:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-12-07 00:02:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1149. [2021-12-07 00:02:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 941 states have (on average 1.385759829968119) internal successors, (1304), 950 states have internal predecessors, (1304), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2021-12-07 00:02:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1661 transitions. [2021-12-07 00:02:07,746 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1661 transitions. Word has length 140 [2021-12-07 00:02:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:02:07,746 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1661 transitions. [2021-12-07 00:02:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 00:02:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1661 transitions. [2021-12-07 00:02:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-07 00:02:07,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:02:07,748 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:02:07,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-07 00:02:07,748 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:02:07,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:02:07,748 INFO L85 PathProgramCache]: Analyzing trace with hash 783452127, now seen corresponding path program 1 times [2021-12-07 00:02:07,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:02:07,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031832492] [2021-12-07 00:02:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:07,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:02:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:07,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 00:02:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-07 00:02:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:07,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-07 00:02:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:07,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-07 00:02:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2021-12-07 00:02:07,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:02:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031832492] [2021-12-07 00:02:07,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031832492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:02:07,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:02:07,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-07 00:02:07,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077210408] [2021-12-07 00:02:07,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:02:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:02:07,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:02:07,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:02:07,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:02:07,922 INFO L87 Difference]: Start difference. First operand 1149 states and 1661 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:02:12,699 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 [] [2021-12-07 00:02:14,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:17,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:19,033 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:23,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:25,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:27,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:29,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:31,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:02:31,283 INFO L93 Difference]: Finished difference Result 2345 states and 3435 transitions. [2021-12-07 00:02:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:02:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 148 [2021-12-07 00:02:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:02:31,287 INFO L225 Difference]: With dead ends: 2345 [2021-12-07 00:02:31,287 INFO L226 Difference]: Without dead ends: 1906 [2021-12-07 00:02:31,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:02:31,288 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 2241 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 868 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 3680 SdHoareTripleChecker+Invalid, 2479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:02:31,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2330 Valid, 3680 Invalid, 2479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 1604 Invalid, 7 Unknown, 0 Unchecked, 23.1s Time] [2021-12-07 00:02:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-12-07 00:02:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1224. [2021-12-07 00:02:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1001 states have (on average 1.3776223776223777) internal successors, (1379), 1010 states have internal predecessors, (1379), 155 states have call successors, (155), 56 states have call predecessors, (155), 67 states have return successors, (224), 157 states have call predecessors, (224), 150 states have call successors, (224) [2021-12-07 00:02:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1758 transitions. [2021-12-07 00:02:31,362 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1758 transitions. Word has length 148 [2021-12-07 00:02:31,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:02:31,362 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1758 transitions. [2021-12-07 00:02:31,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:02:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1758 transitions. [2021-12-07 00:02:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:02:31,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:02:31,364 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:02:31,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-07 00:02:31,364 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:02:31,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:02:31,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1574942648, now seen corresponding path program 1 times [2021-12-07 00:02:31,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:02:31,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881480119] [2021-12-07 00:02:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:31,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:02:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 00:02:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:02:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:31,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-07 00:02:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2021-12-07 00:02:31,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:02:31,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881480119] [2021-12-07 00:02:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881480119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:02:31,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:02:31,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:02:31,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337463420] [2021-12-07 00:02:31,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:02:31,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:02:31,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:02:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:02:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:02:31,536 INFO L87 Difference]: Start difference. First operand 1224 states and 1758 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:02:33,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:36,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:38,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:40,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:43,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:44,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:46,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:02:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:02:46,394 INFO L93 Difference]: Finished difference Result 1453 states and 2131 transitions. [2021-12-07 00:02:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:02:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 145 [2021-12-07 00:02:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:02:46,397 INFO L225 Difference]: With dead ends: 1453 [2021-12-07 00:02:46,397 INFO L226 Difference]: Without dead ends: 1353 [2021-12-07 00:02:46,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:02:46,398 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 269 mSDsluCounter, 2299 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 256 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:02:46,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 3097 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 838 Invalid, 2 Unknown, 0 Unchecked, 14.7s Time] [2021-12-07 00:02:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-12-07 00:02:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1240. [2021-12-07 00:02:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1013 states have (on average 1.3770977295162883) internal successors, (1395), 1024 states have internal predecessors, (1395), 156 states have call successors, (156), 56 states have call predecessors, (156), 70 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2021-12-07 00:02:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1801 transitions. [2021-12-07 00:02:46,464 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1801 transitions. Word has length 145 [2021-12-07 00:02:46,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:02:46,464 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1801 transitions. [2021-12-07 00:02:46,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 00:02:46,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1801 transitions. [2021-12-07 00:02:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-07 00:02:46,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:02:46,466 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:02:46,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-07 00:02:46,466 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:02:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:02:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -796796614, now seen corresponding path program 1 times [2021-12-07 00:02:46,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:02:46,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211264623] [2021-12-07 00:02:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:46,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:02:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:46,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-07 00:02:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:46,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-07 00:02:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:46,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-07 00:02:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-12-07 00:02:46,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:02:46,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211264623] [2021-12-07 00:02:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211264623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:02:46,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124832228] [2021-12-07 00:02:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:02:46,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:02:46,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:02:46,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:02:46,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:02:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:02:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 1618 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-07 00:02:47,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:02:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-12-07 00:02:48,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:02:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2021-12-07 00:02:48,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124832228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:02:48,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:02:48,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2021-12-07 00:02:48,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438264720] [2021-12-07 00:02:48,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:02:48,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-07 00:02:48,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:02:48,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-07 00:02:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2021-12-07 00:02:48,611 INFO L87 Difference]: Start difference. First operand 1240 states and 1801 transitions. Second operand has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 33 states have internal predecessors, (164), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 00:03:16,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:19,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:22,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:24,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:25,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:03:25,816 INFO L93 Difference]: Finished difference Result 2569 states and 3741 transitions. [2021-12-07 00:03:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 00:03:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 33 states have internal predecessors, (164), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 145 [2021-12-07 00:03:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:03:25,821 INFO L225 Difference]: With dead ends: 2569 [2021-12-07 00:03:25,822 INFO L226 Difference]: Without dead ends: 1360 [2021-12-07 00:03:25,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=793, Invalid=1757, Unknown=0, NotChecked=0, Total=2550 [2021-12-07 00:03:25,825 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 488 mSDsluCounter, 12636 mSDsCounter, 0 mSdLazyCounter, 3865 mSolverCounterSat, 466 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 13444 SdHoareTripleChecker+Invalid, 4334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 3865 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:03:25,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 13444 Invalid, 4334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 3865 Invalid, 3 Unknown, 0 Unchecked, 21.6s Time] [2021-12-07 00:03:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-12-07 00:03:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1276. [2021-12-07 00:03:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1049 states have (on average 1.3641563393708294) internal successors, (1431), 1060 states have internal predecessors, (1431), 156 states have call successors, (156), 56 states have call predecessors, (156), 70 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2021-12-07 00:03:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1837 transitions. [2021-12-07 00:03:25,891 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1837 transitions. Word has length 145 [2021-12-07 00:03:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:03:25,891 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1837 transitions. [2021-12-07 00:03:25,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.555555555555555) internal successors, (164), 33 states have internal predecessors, (164), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-07 00:03:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1837 transitions. [2021-12-07 00:03:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-07 00:03:25,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:03:25,893 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:03:25,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:03:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:26,094 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:03:26,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1658059114, now seen corresponding path program 2 times [2021-12-07 00:03:26,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:26,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647482183] [2021-12-07 00:03:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:26,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-07 00:03:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-07 00:03:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-07 00:03:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-12-07 00:03:26,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:26,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647482183] [2021-12-07 00:03:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647482183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:03:26,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765509546] [2021-12-07 00:03:26,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:03:26,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:03:26,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:03:26,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:03:30,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:03:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:03:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:03:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:03:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2021-12-07 00:03:30,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:03:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2021-12-07 00:03:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765509546] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:03:31,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:03:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 9] total 35 [2021-12-07 00:03:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963410318] [2021-12-07 00:03:31,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:03:31,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-07 00:03:31,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:03:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-07 00:03:31,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 00:03:31,068 INFO L87 Difference]: Start difference. First operand 1276 states and 1837 transitions. Second operand has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 32 states have internal predecessors, (148), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:03:41,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:43,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:45,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:46,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:50,700 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:52,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:54,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:55,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:56,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-07 00:03:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:03:56,933 INFO L93 Difference]: Finished difference Result 2753 states and 3996 transitions. [2021-12-07 00:03:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-07 00:03:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 32 states have internal predecessors, (148), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 181 [2021-12-07 00:03:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:03:56,941 INFO L225 Difference]: With dead ends: 2753 [2021-12-07 00:03:56,941 INFO L226 Difference]: Without dead ends: 1498 [2021-12-07 00:03:56,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=575, Invalid=3207, Unknown=0, NotChecked=0, Total=3782 [2021-12-07 00:03:56,945 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 374 mSDsluCounter, 6933 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 336 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 7732 SdHoareTripleChecker+Invalid, 4692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:03:56,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 7732 Invalid, 4692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 4352 Invalid, 4 Unknown, 0 Unchecked, 24.6s Time] [2021-12-07 00:03:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-07 00:03:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1394. [2021-12-07 00:03:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1162 states have (on average 1.3846815834767643) internal successors, (1609), 1171 states have internal predecessors, (1609), 156 states have call successors, (156), 63 states have call predecessors, (156), 75 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2021-12-07 00:03:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2015 transitions. [2021-12-07 00:03:57,044 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2015 transitions. Word has length 181 [2021-12-07 00:03:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:03:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 2015 transitions. [2021-12-07 00:03:57,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.228571428571429) internal successors, (148), 32 states have internal predecessors, (148), 2 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:03:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2015 transitions. [2021-12-07 00:03:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 00:03:57,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:03:57,046 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 16, 16, 16, 16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:03:57,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:03:57,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:57,247 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:03:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:03:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1946786663, now seen corresponding path program 5 times [2021-12-07 00:03:57,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:03:57,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132293735] [2021-12-07 00:03:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:03:57,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:03:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:57,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-07 00:03:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-07 00:03:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:03:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2021-12-07 00:03:57,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:03:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132293735] [2021-12-07 00:03:57,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132293735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:03:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543978611] [2021-12-07 00:03:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:03:57,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:03:57,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:03:57,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:03:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6981cb44-cded-4a2e-b7ed-c16536b78627/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process