./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.08.cil-2.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_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/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_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/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_798bbb50-306d-469d-b4ad-81d6a1096d07/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 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:26:51,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:26:51,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:26:51,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:26:51,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:26:51,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:26:51,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:26:51,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:26:51,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:26:51,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:26:51,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:26:51,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:26:51,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:26:51,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:26:51,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:26:51,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:26:51,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:26:51,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:26:51,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:26:51,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:26:51,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:26:51,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:26:51,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:26:51,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:26:51,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:26:51,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:26:51,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:26:51,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:26:51,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:26:51,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:26:51,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:26:51,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:26:51,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:26:51,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:26:51,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:26:51,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:26:51,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:26:51,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:26:51,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:26:51,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:26:51,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:26:51,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:26:51,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:26:51,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:26:51,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:26:51,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:26:51,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:26:51,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:26:51,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:26:51,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:26:51,327 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:26:51,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:26:51,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:26:51,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:26:51,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:26:51,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:26:51,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:26:51,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:26:51,331 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_798bbb50-306d-469d-b4ad-81d6a1096d07/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 [2021-12-06 22:26:51,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:26:51,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:26:51,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:26:51,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:26:51,520 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:26:51,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2021-12-06 22:26:51,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/data/a70d2f023/56a61213804648828e678741576559e4/FLAG81fcfaa84 [2021-12-06 22:26:51,947 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:26:51,947 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2021-12-06 22:26:51,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/data/a70d2f023/56a61213804648828e678741576559e4/FLAG81fcfaa84 [2021-12-06 22:26:51,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/data/a70d2f023/56a61213804648828e678741576559e4 [2021-12-06 22:26:51,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:26:51,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:26:51,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:26:51,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:26:51,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:26:51,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:26:51" (1/1) ... [2021-12-06 22:26:51,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba2486c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:51, skipping insertion in model container [2021-12-06 22:26:51,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:26:51" (1/1) ... [2021-12-06 22:26:51,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:26:52,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:26:52,129 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_798bbb50-306d-469d-b4ad-81d6a1096d07/sv-benchmarks/c/systemc/token_ring.08.cil-2.c[671,684] [2021-12-06 22:26:52,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:26:52,230 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:26:52,239 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_798bbb50-306d-469d-b4ad-81d6a1096d07/sv-benchmarks/c/systemc/token_ring.08.cil-2.c[671,684] [2021-12-06 22:26:52,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:26:52,300 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:26:52,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52 WrapperNode [2021-12-06 22:26:52,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:26:52,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:26:52,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:26:52,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:26:52,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,344 INFO L137 Inliner]: procedures = 44, calls = 56, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 626 [2021-12-06 22:26:52,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:26:52,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:26:52,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:26:52,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:26:52,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:26:52,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:26:52,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:26:52,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:26:52,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (1/1) ... [2021-12-06 22:26:52,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:26:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:26:52,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:26:52,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_798bbb50-306d-469d-b4ad-81d6a1096d07/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:26:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-06 22:26:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-06 22:26:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-06 22:26:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-06 22:26:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-06 22:26:52,447 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-06 22:26:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-06 22:26:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-06 22:26:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:26:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-06 22:26:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-06 22:26:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:26:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:26:52,522 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:26:52,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:26:52,925 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:26:52,933 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:26:52,933 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-06 22:26:52,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:26:52 BoogieIcfgContainer [2021-12-06 22:26:52,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:26:52,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:26:52,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:26:52,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:26:52,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:26:51" (1/3) ... [2021-12-06 22:26:52,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496003c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:26:52, skipping insertion in model container [2021-12-06 22:26:52,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:26:52" (2/3) ... [2021-12-06 22:26:52,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496003c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:26:52, skipping insertion in model container [2021-12-06 22:26:52,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:26:52" (3/3) ... [2021-12-06 22:26:52,941 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-2.c [2021-12-06 22:26:52,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:26:52,945 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:26:52,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:26:52,987 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:26:52,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:26:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 290 states, 257 states have (on average 1.6536964980544746) internal successors, (425), 261 states have internal predecessors, (425), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-06 22:26:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:26:53,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:53,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:53,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1719211472, now seen corresponding path program 1 times [2021-12-06 22:26:53,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013198650] [2021-12-06 22:26:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:53,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:26:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:26:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:26:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:26:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:26:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:53,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:53,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013198650] [2021-12-06 22:26:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013198650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:53,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:53,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:26:53,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365138921] [2021-12-06 22:26:53,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:53,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:26:53,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:53,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:26:53,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:26:53,413 INFO L87 Difference]: Start difference. First operand has 290 states, 257 states have (on average 1.6536964980544746) internal successors, (425), 261 states have internal predecessors, (425), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:54,258 INFO L93 Difference]: Finished difference Result 666 states and 1098 transitions. [2021-12-06 22:26:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:26:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:26:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:54,276 INFO L225 Difference]: With dead ends: 666 [2021-12-06 22:26:54,276 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 22:26:54,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:26:54,286 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 744 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:54,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 815 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:26:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 22:26:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 284. [2021-12-06 22:26:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 253 states have (on average 1.565217391304348) internal successors, (396), 255 states have internal predecessors, (396), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 22:26:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 442 transitions. [2021-12-06 22:26:54,352 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 442 transitions. Word has length 134 [2021-12-06 22:26:54,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:54,352 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 442 transitions. [2021-12-06 22:26:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 442 transitions. [2021-12-06 22:26:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:26:54,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:54,356 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:54,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:26:54,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 857377870, now seen corresponding path program 1 times [2021-12-06 22:26:54,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274399365] [2021-12-06 22:26:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:54,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:26:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:26:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:26:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:26:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:26:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:54,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:54,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274399365] [2021-12-06 22:26:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274399365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:54,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:54,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:26:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140668188] [2021-12-06 22:26:54,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:26:54,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:26:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:26:54,540 INFO L87 Difference]: Start difference. First operand 284 states and 442 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:55,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:55,971 INFO L93 Difference]: Finished difference Result 1026 states and 1633 transitions. [2021-12-06 22:26:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:26:55,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:26:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:55,977 INFO L225 Difference]: With dead ends: 1026 [2021-12-06 22:26:55,977 INFO L226 Difference]: Without dead ends: 758 [2021-12-06 22:26:55,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:26:55,979 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 1109 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:55,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1300 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 22:26:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-12-06 22:26:56,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 561. [2021-12-06 22:26:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 506 states have (on average 1.5770750988142292) internal successors, (798), 509 states have internal predecessors, (798), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-06 22:26:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 881 transitions. [2021-12-06 22:26:56,031 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 881 transitions. Word has length 134 [2021-12-06 22:26:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:56,032 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 881 transitions. [2021-12-06 22:26:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 881 transitions. [2021-12-06 22:26:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:26:56,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:56,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:56,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:26:56,035 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash -504624566, now seen corresponding path program 1 times [2021-12-06 22:26:56,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:56,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838915147] [2021-12-06 22:26:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:56,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:26:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:26:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:26:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:26:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:26:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:56,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838915147] [2021-12-06 22:26:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838915147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:56,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:56,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:56,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045390805] [2021-12-06 22:26:56,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:56,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:56,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:56,176 INFO L87 Difference]: Start difference. First operand 561 states and 881 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:57,760 INFO L93 Difference]: Finished difference Result 1689 states and 2691 transitions. [2021-12-06 22:26:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:57,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:26:57,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:57,768 INFO L225 Difference]: With dead ends: 1689 [2021-12-06 22:26:57,768 INFO L226 Difference]: Without dead ends: 1144 [2021-12-06 22:26:57,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:26:57,771 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1121 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 2241 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:57,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1136 Valid, 2241 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:26:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-12-06 22:26:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 819. [2021-12-06 22:26:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 740 states have (on average 1.5702702702702702) internal successors, (1162), 744 states have internal predecessors, (1162), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-06 22:26:57,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1281 transitions. [2021-12-06 22:26:57,817 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1281 transitions. Word has length 134 [2021-12-06 22:26:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:57,817 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1281 transitions. [2021-12-06 22:26:57,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1281 transitions. [2021-12-06 22:26:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:26:57,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:57,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:57,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:26:57,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1424307660, now seen corresponding path program 1 times [2021-12-06 22:26:57,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643209260] [2021-12-06 22:26:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:57,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:26:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:26:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:26:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:26:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:26:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:57,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:57,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643209260] [2021-12-06 22:26:57,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643209260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:57,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:57,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:57,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493825880] [2021-12-06 22:26:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:57,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:57,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:57,921 INFO L87 Difference]: Start difference. First operand 819 states and 1281 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:26:59,583 INFO L93 Difference]: Finished difference Result 2666 states and 4239 transitions. [2021-12-06 22:26:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:26:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:26:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:26:59,596 INFO L225 Difference]: With dead ends: 2666 [2021-12-06 22:26:59,596 INFO L226 Difference]: Without dead ends: 1863 [2021-12-06 22:26:59,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:26:59,600 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 1200 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:26:59,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 1549 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:26:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-12-06 22:26:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1336. [2021-12-06 22:26:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1209 states have (on average 1.564102564102564) internal successors, (1891), 1215 states have internal predecessors, (1891), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-06 22:26:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 2086 transitions. [2021-12-06 22:26:59,699 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 2086 transitions. Word has length 134 [2021-12-06 22:26:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:26:59,700 INFO L470 AbstractCegarLoop]: Abstraction has 1336 states and 2086 transitions. [2021-12-06 22:26:59,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:26:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 2086 transitions. [2021-12-06 22:26:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:26:59,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:26:59,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:26:59,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:26:59,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:26:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:26:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash -868773366, now seen corresponding path program 1 times [2021-12-06 22:26:59,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:26:59,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806034865] [2021-12-06 22:26:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:26:59,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:26:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:26:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:26:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:26:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:26:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:26:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:26:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:26:59,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:26:59,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806034865] [2021-12-06 22:26:59,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806034865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:26:59,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:26:59,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:26:59,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073887834] [2021-12-06 22:26:59,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:26:59,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:26:59,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:26:59,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:26:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:26:59,812 INFO L87 Difference]: Start difference. First operand 1336 states and 2086 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:01,442 INFO L93 Difference]: Finished difference Result 4547 states and 7204 transitions. [2021-12-06 22:27:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:27:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:01,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:01,456 INFO L225 Difference]: With dead ends: 4547 [2021-12-06 22:27:01,456 INFO L226 Difference]: Without dead ends: 3227 [2021-12-06 22:27:01,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:27:01,460 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1113 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:01,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 2227 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:27:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2021-12-06 22:27:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 2371. [2021-12-06 22:27:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2371 states, 2148 states have (on average 1.559124767225326) internal successors, (3349), 2158 states have internal predecessors, (3349), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-06 22:27:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2371 states to 2371 states and 3702 transitions. [2021-12-06 22:27:01,582 INFO L78 Accepts]: Start accepts. Automaton has 2371 states and 3702 transitions. Word has length 134 [2021-12-06 22:27:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:01,583 INFO L470 AbstractCegarLoop]: Abstraction has 2371 states and 3702 transitions. [2021-12-06 22:27:01,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2371 states and 3702 transitions. [2021-12-06 22:27:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:01,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:01,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:01,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:27:01,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash 858371596, now seen corresponding path program 1 times [2021-12-06 22:27:01,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373837100] [2021-12-06 22:27:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:01,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:01,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:01,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373837100] [2021-12-06 22:27:01,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373837100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:01,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:01,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:01,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138624146] [2021-12-06 22:27:01,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:01,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:01,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:01,687 INFO L87 Difference]: Start difference. First operand 2371 states and 3702 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:03,366 INFO L93 Difference]: Finished difference Result 8308 states and 13150 transitions. [2021-12-06 22:27:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:27:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:03,389 INFO L225 Difference]: With dead ends: 8308 [2021-12-06 22:27:03,389 INFO L226 Difference]: Without dead ends: 5953 [2021-12-06 22:27:03,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:27:03,395 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 1109 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:03,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 2223 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 22:27:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-12-06 22:27:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4446. [2021-12-06 22:27:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4446 states, 4031 states have (on average 1.555693376333416) internal successors, (6271), 4049 states have internal predecessors, (6271), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-06 22:27:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6958 transitions. [2021-12-06 22:27:03,612 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6958 transitions. Word has length 134 [2021-12-06 22:27:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:03,612 INFO L470 AbstractCegarLoop]: Abstraction has 4446 states and 6958 transitions. [2021-12-06 22:27:03,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6958 transitions. [2021-12-06 22:27:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:03,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:03,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:03,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:27:03,616 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1329727946, now seen corresponding path program 1 times [2021-12-06 22:27:03,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:03,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763699316] [2021-12-06 22:27:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:03,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:03,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763699316] [2021-12-06 22:27:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763699316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:03,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:03,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:03,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971401669] [2021-12-06 22:27:03,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:03,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:03,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:03,708 INFO L87 Difference]: Start difference. First operand 4446 states and 6958 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:05,687 INFO L93 Difference]: Finished difference Result 15829 states and 25100 transitions. [2021-12-06 22:27:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:27:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:05,731 INFO L225 Difference]: With dead ends: 15829 [2021-12-06 22:27:05,731 INFO L226 Difference]: Without dead ends: 11399 [2021-12-06 22:27:05,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:27:05,743 INFO L933 BasicCegarLoop]: 725 mSDtfsCounter, 1105 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 2219 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:05,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 2219 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:27:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-12-06 22:27:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 8609. [2021-12-06 22:27:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 7810 states have (on average 1.5535211267605633) internal successors, (12133), 7844 states have internal predecessors, (12133), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-06 22:27:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 13542 transitions. [2021-12-06 22:27:06,195 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 13542 transitions. Word has length 134 [2021-12-06 22:27:06,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:06,196 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 13542 transitions. [2021-12-06 22:27:06,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 13542 transitions. [2021-12-06 22:27:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:06,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:06,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:06,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:27:06,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:06,202 INFO L85 PathProgramCache]: Analyzing trace with hash -317634996, now seen corresponding path program 1 times [2021-12-06 22:27:06,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:06,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437522968] [2021-12-06 22:27:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:06,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:06,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:06,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437522968] [2021-12-06 22:27:06,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437522968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:06,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:06,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:06,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117324894] [2021-12-06 22:27:06,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:06,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:06,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:06,294 INFO L87 Difference]: Start difference. First operand 8609 states and 13542 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:08,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:08,628 INFO L93 Difference]: Finished difference Result 30870 states and 49190 transitions. [2021-12-06 22:27:08,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:27:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:08,695 INFO L225 Difference]: With dead ends: 30870 [2021-12-06 22:27:08,695 INFO L226 Difference]: Without dead ends: 22277 [2021-12-06 22:27:08,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:27:08,720 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1104 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:08,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 2213 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 22:27:08,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22277 states. [2021-12-06 22:27:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22277 to 16964. [2021-12-06 22:27:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16964 states, 15397 states have (on average 1.5521854906800026) internal successors, (23899), 15463 states have internal predecessors, (23899), 1112 states have call successors, (1112), 391 states have call predecessors, (1112), 454 states have return successors, (1903), 1173 states have call predecessors, (1903), 1110 states have call successors, (1903) [2021-12-06 22:27:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16964 states to 16964 states and 26914 transitions. [2021-12-06 22:27:09,533 INFO L78 Accepts]: Start accepts. Automaton has 16964 states and 26914 transitions. Word has length 134 [2021-12-06 22:27:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:09,533 INFO L470 AbstractCegarLoop]: Abstraction has 16964 states and 26914 transitions. [2021-12-06 22:27:09,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 16964 states and 26914 transitions. [2021-12-06 22:27:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:09,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:09,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:09,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:27:09,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:09,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1845981578, now seen corresponding path program 1 times [2021-12-06 22:27:09,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:09,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762721379] [2021-12-06 22:27:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:09,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:09,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:09,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762721379] [2021-12-06 22:27:09,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762721379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:09,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:09,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:09,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599407830] [2021-12-06 22:27:09,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:09,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:09,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:09,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:09,631 INFO L87 Difference]: Start difference. First operand 16964 states and 26914 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:13,066 INFO L93 Difference]: Finished difference Result 60888 states and 97844 transitions. [2021-12-06 22:27:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:27:13,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:13,198 INFO L225 Difference]: With dead ends: 60888 [2021-12-06 22:27:13,198 INFO L226 Difference]: Without dead ends: 43940 [2021-12-06 22:27:13,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:27:13,234 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1099 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:13,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 2205 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:27:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43940 states. [2021-12-06 22:27:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43940 to 33800. [2021-12-06 22:27:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33800 states, 30697 states have (on average 1.5523015278365964) internal successors, (47651), 30827 states have internal predecessors, (47651), 2200 states have call successors, (2200), 775 states have call predecessors, (2200), 902 states have return successors, (4513), 2325 states have call predecessors, (4513), 2198 states have call successors, (4513) [2021-12-06 22:27:14,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33800 states to 33800 states and 54364 transitions. [2021-12-06 22:27:14,878 INFO L78 Accepts]: Start accepts. Automaton has 33800 states and 54364 transitions. Word has length 134 [2021-12-06 22:27:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:14,878 INFO L470 AbstractCegarLoop]: Abstraction has 33800 states and 54364 transitions. [2021-12-06 22:27:14,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33800 states and 54364 transitions. [2021-12-06 22:27:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:14,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:14,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:14,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:27:14,897 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -127183800, now seen corresponding path program 1 times [2021-12-06 22:27:14,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767269982] [2021-12-06 22:27:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:14,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:14,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767269982] [2021-12-06 22:27:14,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767269982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:14,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:14,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:14,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602791494] [2021-12-06 22:27:14,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:14,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:14,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:14,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:14,993 INFO L87 Difference]: Start difference. First operand 33800 states and 54364 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:22,229 INFO L93 Difference]: Finished difference Result 136542 states and 220810 transitions. [2021-12-06 22:27:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:27:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:22,530 INFO L225 Difference]: With dead ends: 136542 [2021-12-06 22:27:22,530 INFO L226 Difference]: Without dead ends: 102758 [2021-12-06 22:27:22,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:27:22,613 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1428 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:22,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 2190 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 22:27:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102758 states. [2021-12-06 22:27:26,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102758 to 67213. [2021-12-06 22:27:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67213 states, 61166 states have (on average 1.554540103979335) internal successors, (95085), 61424 states have internal predecessors, (95085), 4248 states have call successors, (4248), 1543 states have call predecessors, (4248), 1798 states have return successors, (11063), 4501 states have call predecessors, (11063), 4246 states have call successors, (11063) [2021-12-06 22:27:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67213 states to 67213 states and 110396 transitions. [2021-12-06 22:27:26,404 INFO L78 Accepts]: Start accepts. Automaton has 67213 states and 110396 transitions. Word has length 134 [2021-12-06 22:27:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:26,404 INFO L470 AbstractCegarLoop]: Abstraction has 67213 states and 110396 transitions. [2021-12-06 22:27:26,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 67213 states and 110396 transitions. [2021-12-06 22:27:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:26,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:26,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:26,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:27:26,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2025923018, now seen corresponding path program 1 times [2021-12-06 22:27:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269723249] [2021-12-06 22:27:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:26,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:26,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:26,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269723249] [2021-12-06 22:27:26,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269723249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:26,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:26,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:26,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553415200] [2021-12-06 22:27:26,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:26,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:26,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:26,521 INFO L87 Difference]: Start difference. First operand 67213 states and 110396 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:27:40,339 INFO L93 Difference]: Finished difference Result 268137 states and 442424 transitions. [2021-12-06 22:27:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:27:40,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:27:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:27:40,954 INFO L225 Difference]: With dead ends: 268137 [2021-12-06 22:27:40,954 INFO L226 Difference]: Without dead ends: 200940 [2021-12-06 22:27:41,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:27:41,119 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1246 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:27:41,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 1679 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 22:27:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200940 states. [2021-12-06 22:27:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200940 to 131350. [2021-12-06 22:27:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131350 states, 119543 states have (on average 1.5515002969642722) internal successors, (185471), 120057 states have internal predecessors, (185471), 8216 states have call successors, (8216), 3079 states have call predecessors, (8216), 3590 states have return successors, (28409), 8725 states have call predecessors, (28409), 8214 states have call successors, (28409) [2021-12-06 22:27:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131350 states to 131350 states and 222096 transitions. [2021-12-06 22:27:48,533 INFO L78 Accepts]: Start accepts. Automaton has 131350 states and 222096 transitions. Word has length 134 [2021-12-06 22:27:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:27:48,534 INFO L470 AbstractCegarLoop]: Abstraction has 131350 states and 222096 transitions. [2021-12-06 22:27:48,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:27:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 131350 states and 222096 transitions. [2021-12-06 22:27:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:27:48,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:27:48,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:27:48,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:27:48,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:27:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:27:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1402641416, now seen corresponding path program 1 times [2021-12-06 22:27:48,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:27:48,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447806234] [2021-12-06 22:27:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:27:48,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:27:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:27:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:27:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:27:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:27:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:27:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:27:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:27:48,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:27:48,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447806234] [2021-12-06 22:27:48,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447806234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:27:48,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:27:48,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:27:48,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762365098] [2021-12-06 22:27:48,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:27:48,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:27:48,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:27:48,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:27:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:27:48,677 INFO L87 Difference]: Start difference. First operand 131350 states and 222096 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:28:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:28:14,545 INFO L93 Difference]: Finished difference Result 518912 states and 881518 transitions. [2021-12-06 22:28:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:28:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:28:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:28:16,280 INFO L225 Difference]: With dead ends: 518912 [2021-12-06 22:28:16,280 INFO L226 Difference]: Without dead ends: 387578 [2021-12-06 22:28:16,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:28:16,784 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 1348 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2114 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:28:16,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 2180 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2114 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 22:28:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387578 states. [2021-12-06 22:28:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387578 to 261927. [2021-12-06 22:28:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261927 states, 238856 states have (on average 1.5536766922329772) internal successors, (371105), 239882 states have internal predecessors, (371105), 15896 states have call successors, (15896), 6151 states have call predecessors, (15896), 7174 states have return successors, (75967), 16917 states have call predecessors, (75967), 15894 states have call successors, (75967) [2021-12-06 22:28:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261927 states to 261927 states and 462968 transitions. [2021-12-06 22:28:33,115 INFO L78 Accepts]: Start accepts. Automaton has 261927 states and 462968 transitions. Word has length 134 [2021-12-06 22:28:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:28:33,115 INFO L470 AbstractCegarLoop]: Abstraction has 261927 states and 462968 transitions. [2021-12-06 22:28:33,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:28:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 261927 states and 462968 transitions. [2021-12-06 22:28:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:28:33,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:28:33,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:28:33,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:28:33,237 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:28:33,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:28:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1521082890, now seen corresponding path program 1 times [2021-12-06 22:28:33,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:28:33,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328223767] [2021-12-06 22:28:33,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:28:33,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:28:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:28:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:28:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:28:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:28:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:28:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:28:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:28:33,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:28:33,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328223767] [2021-12-06 22:28:33,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328223767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:28:33,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:28:33,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:28:33,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699399474] [2021-12-06 22:28:33,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:28:33,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:28:33,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:28:33,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:28:33,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:28:33,328 INFO L87 Difference]: Start difference. First operand 261927 states and 462968 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:28:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:28:55,216 INFO L93 Difference]: Finished difference Result 601841 states and 1108679 transitions. [2021-12-06 22:28:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:28:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:28:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:28:56,911 INFO L225 Difference]: With dead ends: 601841 [2021-12-06 22:28:56,911 INFO L226 Difference]: Without dead ends: 339930 [2021-12-06 22:28:57,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:28:57,782 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 812 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:28:57,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1147 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 22:28:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339930 states. [2021-12-06 22:29:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339930 to 261927. [2021-12-06 22:29:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261927 states, 238856 states have (on average 1.5493854037579127) internal successors, (370080), 239882 states have internal predecessors, (370080), 15896 states have call successors, (15896), 6151 states have call predecessors, (15896), 7174 states have return successors, (75967), 16917 states have call predecessors, (75967), 15894 states have call successors, (75967) [2021-12-06 22:29:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261927 states to 261927 states and 461943 transitions. [2021-12-06 22:29:17,268 INFO L78 Accepts]: Start accepts. Automaton has 261927 states and 461943 transitions. Word has length 134 [2021-12-06 22:29:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:29:17,268 INFO L470 AbstractCegarLoop]: Abstraction has 261927 states and 461943 transitions. [2021-12-06 22:29:17,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:29:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 261927 states and 461943 transitions. [2021-12-06 22:29:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:29:17,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:29:17,455 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:29:17,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:29:17,455 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:29:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:29:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1384590392, now seen corresponding path program 1 times [2021-12-06 22:29:17,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:29:17,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972156780] [2021-12-06 22:29:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:29:17,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:29:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:29:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:29:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:29:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:29:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:29:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:29:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:29:17,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:29:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972156780] [2021-12-06 22:29:17,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972156780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:29:17,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:29:17,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:29:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330775074] [2021-12-06 22:29:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:29:17,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:29:17,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:29:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:29:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:29:17,544 INFO L87 Difference]: Start difference. First operand 261927 states and 461943 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:30:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:30:10,455 INFO L93 Difference]: Finished difference Result 1002797 states and 1782748 transitions. [2021-12-06 22:30:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:30:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:30:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:30:13,811 INFO L225 Difference]: With dead ends: 1002797 [2021-12-06 22:30:13,812 INFO L226 Difference]: Without dead ends: 740886 [2021-12-06 22:30:14,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:30:14,856 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1131 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 2245 SdHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:30:14,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 2245 Invalid, 2431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 22:30:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740886 states. [2021-12-06 22:30:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740886 to 523593. [2021-12-06 22:30:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523593 states, 478506 states have (on average 1.5503671845285116) internal successors, (741860), 480556 states have internal predecessors, (741860), 30744 states have call successors, (30744), 12295 states have call predecessors, (30744), 14342 states have return successors, (209937), 32789 states have call predecessors, (209937), 30742 states have call successors, (209937) [2021-12-06 22:30:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523593 states to 523593 states and 982541 transitions. [2021-12-06 22:30:52,585 INFO L78 Accepts]: Start accepts. Automaton has 523593 states and 982541 transitions. Word has length 134 [2021-12-06 22:30:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:30:52,586 INFO L470 AbstractCegarLoop]: Abstraction has 523593 states and 982541 transitions. [2021-12-06 22:30:52,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:30:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 523593 states and 982541 transitions. [2021-12-06 22:30:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:30:52,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:30:52,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:30:52,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:30:52,773 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:30:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:30:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash 876982858, now seen corresponding path program 1 times [2021-12-06 22:30:52,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:30:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028736838] [2021-12-06 22:30:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:30:52,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:30:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:30:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:30:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:30:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:30:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:30:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:30:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:30:52,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:30:52,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028736838] [2021-12-06 22:30:52,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028736838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:30:52,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:30:52,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:30:52,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801116727] [2021-12-06 22:30:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:30:52,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:30:52,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:30:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:30:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:30:52,869 INFO L87 Difference]: Start difference. First operand 523593 states and 982541 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:32:41,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:32:41,992 INFO L93 Difference]: Finished difference Result 1968013 states and 3741156 transitions. [2021-12-06 22:32:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 22:32:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 134 [2021-12-06 22:32:41,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:32:49,848 INFO L225 Difference]: With dead ends: 1968013 [2021-12-06 22:32:49,848 INFO L226 Difference]: Without dead ends: 1444436 [2021-12-06 22:32:52,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:32:52,421 INFO L933 BasicCegarLoop]: 676 mSDtfsCounter, 1225 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:32:52,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1249 Valid, 2162 Invalid, 2162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 22:32:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444436 states. [2021-12-06 22:34:12,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444436 to 1045898. [2021-12-06 22:34:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045898 states, 957803 states have (on average 1.5519245606873229) internal successors, (1486438), 961901 states have internal predecessors, (1486438), 59416 states have call successors, (59416), 24583 states have call predecessors, (59416), 28678 states have return successors, (594951), 63509 states have call predecessors, (594951), 59414 states have call successors, (594951) [2021-12-06 22:34:21,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045898 states to 1045898 states and 2140805 transitions. [2021-12-06 22:34:21,257 INFO L78 Accepts]: Start accepts. Automaton has 1045898 states and 2140805 transitions. Word has length 134 [2021-12-06 22:34:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:34:21,258 INFO L470 AbstractCegarLoop]: Abstraction has 1045898 states and 2140805 transitions. [2021-12-06 22:34:21,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-06 22:34:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1045898 states and 2140805 transitions. [2021-12-06 22:34:21,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 22:34:21,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:34:21,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:34:21,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:34:21,828 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:34:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:34:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash -989725816, now seen corresponding path program 1 times [2021-12-06 22:34:21,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:34:21,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319904139] [2021-12-06 22:34:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:34:21,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:34:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:34:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 22:34:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-06 22:34:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-06 22:34:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:34:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:34:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:34:21,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:34:21,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319904139] [2021-12-06 22:34:21,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319904139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:34:21,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:34:21,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:34:21,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655140237] [2021-12-06 22:34:21,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:34:21,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:34:21,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:34:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:34:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:34:21,909 INFO L87 Difference]: Start difference. First operand 1045898 states and 2140805 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 5 states have internal predecessors, (123), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)