./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL --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 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:35:56,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:35:56,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:35:56,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:35:56,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:35:56,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:35:56,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:35:56,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:35:56,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:35:56,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:35:56,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:35:56,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:35:56,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:35:56,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:35:56,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:35:56,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:35:56,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:35:56,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:35:56,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:35:56,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:35:56,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:35:56,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:35:56,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:35:56,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:35:56,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:35:56,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:35:56,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:35:56,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:35:56,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:35:56,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:35:56,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:35:56,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:35:56,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:35:56,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:35:56,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:35:56,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:35:56,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:35:56,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:35:56,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:35:56,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:35:56,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:35:56,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:35:56,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:35:56,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:35:56,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:35:56,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:35:56,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:35:56,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:35:56,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:35:56,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:35:56,624 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:35:56,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:35:56,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:35:56,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:35:56,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:35:56,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:35:56,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:35:56,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:35:56,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:35:56,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:35:56,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:35:56,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:35:56,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:35:56,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:35:56,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:35:56,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:35:56,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:56,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:35:56,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:35:56,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:35:56,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:35:56,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:35:56,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:35:56,633 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:35:56,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:35:56,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:35:56,634 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_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2021-11-19 05:35:56,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:35:56,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:35:56,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:35:56,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:35:56,939 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:35:56,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-11-19 05:35:57,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/data/7f6e0c5c3/ab737d63835149b8b3e55ea81f99f62a/FLAG26ccf1763 [2021-11-19 05:35:57,475 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:35:57,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-11-19 05:35:57,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/data/7f6e0c5c3/ab737d63835149b8b3e55ea81f99f62a/FLAG26ccf1763 [2021-11-19 05:35:57,875 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/data/7f6e0c5c3/ab737d63835149b8b3e55ea81f99f62a [2021-11-19 05:35:57,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:35:57,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:35:57,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:57,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:35:57,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:35:57,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:57" (1/1) ... [2021-11-19 05:35:57,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61453191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:57, skipping insertion in model container [2021-11-19 05:35:57,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:35:57" (1/1) ... [2021-11-19 05:35:57,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:35:57,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:35:58,160 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_f163997e-9fb4-46b6-a82b-bb635a2c80ea/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-11-19 05:35:58,175 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:58,184 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:35:58,198 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_f163997e-9fb4-46b6-a82b-bb635a2c80ea/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-11-19 05:35:58,204 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:35:58,218 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:35:58,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58 WrapperNode [2021-11-19 05:35:58,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:35:58,220 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:35:58,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:35:58,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:35:58,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,256 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-11-19 05:35:58,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:35:58,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:35:58,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:35:58,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:35:58,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:35:58,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:35:58,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:35:58,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:35:58,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (1/1) ... [2021-11-19 05:35:58,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:35:58,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:58,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:35:58,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:35:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:35:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:35:58,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:35:58,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:35:58,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:35:58,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:35:58,453 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:35:58,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:35:58,684 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:35:58,691 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:35:58,696 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:35:58,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:58 BoogieIcfgContainer [2021-11-19 05:35:58,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:35:58,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:35:58,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:35:58,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:35:58,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:35:57" (1/3) ... [2021-11-19 05:35:58,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3771eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:58, skipping insertion in model container [2021-11-19 05:35:58,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:35:58" (2/3) ... [2021-11-19 05:35:58,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3771eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:35:58, skipping insertion in model container [2021-11-19 05:35:58,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:58" (3/3) ... [2021-11-19 05:35:58,728 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2021-11-19 05:35:58,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:35:58,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:35:58,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:35:58,809 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:35:58,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:35:58,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:35:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:35:58,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:58,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:58,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -167421905, now seen corresponding path program 1 times [2021-11-19 05:35:58,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:58,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714820056] [2021-11-19 05:35:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:58,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:59,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714820056] [2021-11-19 05:35:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714820056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:59,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:35:59,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54930690] [2021-11-19 05:35:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:59,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:35:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:35:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:35:59,078 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:59,114 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2021-11-19 05:35:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:35:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 05:35:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:59,124 INFO L225 Difference]: With dead ends: 56 [2021-11-19 05:35:59,124 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:35:59,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:35:59,132 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:59,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:35:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:35:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-19 05:35:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:35:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-19 05:35:59,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 11 [2021-11-19 05:35:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:59,172 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-19 05:35:59,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-19 05:35:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:35:59,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:59,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:59,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:35:59,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831489, now seen corresponding path program 1 times [2021-11-19 05:35:59,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:59,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680291531] [2021-11-19 05:35:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:59,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:59,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:59,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680291531] [2021-11-19 05:35:59,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680291531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:59,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:59,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:35:59,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13044901] [2021-11-19 05:35:59,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:59,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:35:59,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:59,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:35:59,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:35:59,287 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:59,385 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-11-19 05:35:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:35:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 05:35:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:59,387 INFO L225 Difference]: With dead ends: 32 [2021-11-19 05:35:59,387 INFO L226 Difference]: Without dead ends: 30 [2021-11-19 05:35:59,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:35:59,389 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-19 05:35:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-19 05:35:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:35:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-19 05:35:59,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2021-11-19 05:35:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-19 05:35:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:35:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-19 05:35:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:35:59,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:59,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:59,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:35:59,403 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:59,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:59,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2126947644, now seen corresponding path program 1 times [2021-11-19 05:35:59,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:59,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214077977] [2021-11-19 05:35:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:59,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:35:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:35:59,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:59,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214077977] [2021-11-19 05:35:59,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214077977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:59,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:59,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:35:59,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254851543] [2021-11-19 05:35:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:59,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:35:59,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:35:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:35:59,530 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:59,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:59,688 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-11-19 05:35:59,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:35:59,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-19 05:35:59,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:59,690 INFO L225 Difference]: With dead ends: 45 [2021-11-19 05:35:59,690 INFO L226 Difference]: Without dead ends: 43 [2021-11-19 05:35:59,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:35:59,693 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:59,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 113 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-19 05:35:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-11-19 05:35:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 05:35:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-11-19 05:35:59,708 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2021-11-19 05:35:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:59,708 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-11-19 05:35:59,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:35:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-11-19 05:35:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:35:59,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:59,710 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:59,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:35:59,711 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2018842485, now seen corresponding path program 1 times [2021-11-19 05:35:59,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:59,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864712463] [2021-11-19 05:35:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:59,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:35:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:35:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:35:59,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:59,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864712463] [2021-11-19 05:35:59,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864712463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:35:59,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:35:59,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:35:59,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636926076] [2021-11-19 05:35:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:35:59,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:35:59,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:35:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:35:59,854 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:35:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:59,989 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-11-19 05:35:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:35:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-19 05:35:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:59,992 INFO L225 Difference]: With dead ends: 52 [2021-11-19 05:35:59,992 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 05:35:59,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:35:59,995 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:59,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 194 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:35:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 05:36:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-11-19 05:36:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 05:36:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-19 05:36:00,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2021-11-19 05:36:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:00,013 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-19 05:36:00,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:36:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-19 05:36:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 05:36:00,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:00,016 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:00,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:36:00,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:00,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488141, now seen corresponding path program 1 times [2021-11-19 05:36:00,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:00,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225441294] [2021-11-19 05:36:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:00,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:36:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:36:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-19 05:36:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:36:00,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:00,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225441294] [2021-11-19 05:36:00,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225441294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:00,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:00,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 05:36:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784773676] [2021-11-19 05:36:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:00,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:36:00,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:36:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:36:00,144 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:36:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:00,388 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2021-11-19 05:36:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:36:00,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-19 05:36:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:00,393 INFO L225 Difference]: With dead ends: 71 [2021-11-19 05:36:00,393 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:36:00,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:36:00,396 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:00,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 117 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:36:00,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:36:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-11-19 05:36:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 05:36:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-19 05:36:00,413 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2021-11-19 05:36:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-19 05:36:00,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:36:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-19 05:36:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 05:36:00,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:00,416 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:00,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:36:00,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1722491344, now seen corresponding path program 1 times [2021-11-19 05:36:00,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:00,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257715360] [2021-11-19 05:36:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:00,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:36:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:36:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:36:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:36:00,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:00,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257715360] [2021-11-19 05:36:00,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257715360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:00,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:00,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 05:36:00,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989799041] [2021-11-19 05:36:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:00,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:36:00,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:36:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:36:00,592 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:36:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:00,791 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2021-11-19 05:36:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:36:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-19 05:36:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:00,799 INFO L225 Difference]: With dead ends: 73 [2021-11-19 05:36:00,799 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 05:36:00,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:36:00,811 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:00,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:36:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 05:36:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2021-11-19 05:36:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 05:36:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-11-19 05:36:00,842 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2021-11-19 05:36:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:00,843 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-11-19 05:36:00,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 05:36:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-11-19 05:36:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 05:36:00,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:00,846 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:00,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:36:00,846 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1030091550, now seen corresponding path program 1 times [2021-11-19 05:36:00,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:00,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66356218] [2021-11-19 05:36:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:00,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:36:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:36:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:36:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:36:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:36:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:36:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 05:36:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:01,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:01,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66356218] [2021-11-19 05:36:01,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66356218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:01,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123347840] [2021-11-19 05:36:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:01,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:01,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:01,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:36:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:01,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:36:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:01,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123347840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:02,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:36:02,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-19 05:36:02,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841980453] [2021-11-19 05:36:02,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:02,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:36:02,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:36:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:36:02,205 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 05:36:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:02,890 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2021-11-19 05:36:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:36:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 53 [2021-11-19 05:36:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:02,893 INFO L225 Difference]: With dead ends: 111 [2021-11-19 05:36:02,893 INFO L226 Difference]: Without dead ends: 96 [2021-11-19 05:36:02,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:36:02,895 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 72 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 292 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:36:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-19 05:36:02,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-11-19 05:36:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 05:36:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2021-11-19 05:36:02,930 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 53 [2021-11-19 05:36:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:02,930 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2021-11-19 05:36:02,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 05:36:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2021-11-19 05:36:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:36:02,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:02,933 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:02,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:03,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:36:03,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:03,166 INFO L85 PathProgramCache]: Analyzing trace with hash 302113055, now seen corresponding path program 1 times [2021-11-19 05:36:03,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:03,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851633533] [2021-11-19 05:36:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:03,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:36:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:36:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:36:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:36:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:36:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:36:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 05:36:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:03,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851633533] [2021-11-19 05:36:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851633533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697783775] [2021-11-19 05:36:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:03,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:03,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:03,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:36:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:36:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:03,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 05:36:03,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697783775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:03,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:36:03,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2021-11-19 05:36:03,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901241360] [2021-11-19 05:36:03,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:03,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:36:03,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:36:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:36:03,988 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 05:36:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:04,168 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2021-11-19 05:36:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:36:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2021-11-19 05:36:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:04,173 INFO L225 Difference]: With dead ends: 94 [2021-11-19 05:36:04,173 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 05:36:04,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:36:04,178 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:04,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:36:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 05:36:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-19 05:36:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 05:36:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2021-11-19 05:36:04,219 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 55 [2021-11-19 05:36:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:04,219 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2021-11-19 05:36:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-19 05:36:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2021-11-19 05:36:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 05:36:04,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:04,221 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:04,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:04,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:36:04,443 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash 847231248, now seen corresponding path program 2 times [2021-11-19 05:36:04,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:04,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900214369] [2021-11-19 05:36:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:04,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:36:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:36:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:36:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:36:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:36:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:36:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 05:36:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:36:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:36:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 05:36:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:36:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 31 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-19 05:36:04,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:04,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900214369] [2021-11-19 05:36:04,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900214369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:04,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872055673] [2021-11-19 05:36:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:36:04,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:04,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:04,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:36:04,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:36:04,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:36:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:36:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-19 05:36:05,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-19 05:36:05,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872055673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:05,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:36:05,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2021-11-19 05:36:05,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117160780] [2021-11-19 05:36:05,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:05,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 05:36:05,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 05:36:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:36:05,821 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 26 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-19 05:36:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:06,916 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2021-11-19 05:36:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:36:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) Word has length 80 [2021-11-19 05:36:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:06,919 INFO L225 Difference]: With dead ends: 109 [2021-11-19 05:36:06,919 INFO L226 Difference]: Without dead ends: 107 [2021-11-19 05:36:06,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=1580, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:36:06,922 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:06,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 230 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:36:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-19 05:36:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2021-11-19 05:36:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-19 05:36:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-11-19 05:36:06,940 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 80 [2021-11-19 05:36:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:06,941 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-11-19 05:36:06,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-19 05:36:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-11-19 05:36:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 05:36:06,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:06,944 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:06,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:07,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:07,161 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:07,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:07,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1329001986, now seen corresponding path program 2 times [2021-11-19 05:36:07,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:07,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554498906] [2021-11-19 05:36:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:07,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 05:36:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:36:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 05:36:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:36:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:36:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:36:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 05:36:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-19 05:36:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:36:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 05:36:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:36:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 05:36:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:36:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-19 05:36:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-19 05:36:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 56 proven. 49 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-19 05:36:07,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:07,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554498906] [2021-11-19 05:36:07,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554498906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:07,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084183890] [2021-11-19 05:36:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:36:07,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:07,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:07,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:36:07,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:36:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:36:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 05:36:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-11-19 05:36:08,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2021-11-19 05:36:08,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084183890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:08,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:36:08,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 18 [2021-11-19 05:36:08,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065272515] [2021-11-19 05:36:08,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:08,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:36:08,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:36:08,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:36:08,607 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-19 05:36:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:09,096 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2021-11-19 05:36:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:36:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 103 [2021-11-19 05:36:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:09,098 INFO L225 Difference]: With dead ends: 96 [2021-11-19 05:36:09,098 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 05:36:09,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:36:09,101 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:09,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 246 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:36:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 05:36:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 05:36:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:36:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 05:36:09,105 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2021-11-19 05:36:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:09,105 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:36:09,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-19 05:36:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 05:36:09,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 05:36:09,108 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 05:36:09,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:09,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:36:09,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 05:36:10,297 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-19 05:36:10,297 INFO L858 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2021-11-19 05:36:10,297 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2021-11-19 05:36:10,298 INFO L854 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2021-11-19 05:36:10,298 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 45) no Hoare annotation was computed. [2021-11-19 05:36:10,298 INFO L858 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2021-11-19 05:36:10,298 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-19 05:36:10,298 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-19 05:36:10,298 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-19 05:36:10,299 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-19 05:36:10,299 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2) (let ((.cse3 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse3 |ULTIMATE.start_main_~bufferlen~0#1|) .cse0 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse3) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2021-11-19 05:36:10,299 INFO L854 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse0 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2021-11-19 05:36:10,299 INFO L854 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse0 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2021-11-19 05:36:10,299 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2021-11-19 05:36:10,300 INFO L854 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2) (let ((.cse3 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse3 |ULTIMATE.start_main_~bufferlen~0#1|) .cse0 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse3) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2021-11-19 05:36:10,300 INFO L858 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2021-11-19 05:36:10,300 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-19 05:36:10,300 INFO L858 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2021-11-19 05:36:10,300 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse0 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|))) [2021-11-19 05:36:10,301 INFO L854 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse0 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|))) [2021-11-19 05:36:10,301 INFO L858 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2021-11-19 05:36:10,301 INFO L861 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2021-11-19 05:36:10,301 INFO L861 garLoopResultBuilder]: At program point L55-1(lines 24 56) the Hoare annotation is: true [2021-11-19 05:36:10,301 INFO L854 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (< 0 (+ |ULTIMATE.start_main_~buflim~0#1| 1)) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (<= .cse0 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2021-11-19 05:36:10,301 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2021-11-19 05:36:10,302 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-11-19 05:36:10,302 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-11-19 05:36:10,302 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-11-19 05:36:10,302 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-19 05:36:10,302 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-19 05:36:10,302 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-19 05:36:10,310 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:10,312 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 05:36:10,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:36:10 BoogieIcfgContainer [2021-11-19 05:36:10,340 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 05:36:10,341 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 05:36:10,341 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 05:36:10,341 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 05:36:10,342 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:35:58" (3/4) ... [2021-11-19 05:36:10,347 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-19 05:36:10,355 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-19 05:36:10,362 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-19 05:36:10,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-19 05:36:10,363 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-19 05:36:10,364 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-19 05:36:10,421 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 05:36:10,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 05:36:10,423 INFO L158 Benchmark]: Toolchain (without parser) took 12542.95ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 64.6MB in the beginning and 53.2MB in the end (delta: 11.4MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,423 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory was 81.3MB in the beginning and 81.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:36:10,425 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.60ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 78.9MB in the end (delta: -14.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,425 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.58ms. Allocated memory is still 102.8MB. Free memory was 78.9MB in the beginning and 77.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,426 INFO L158 Benchmark]: Boogie Preprocessor took 22.28ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 76.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:36:10,426 INFO L158 Benchmark]: RCFGBuilder took 425.83ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 66.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,427 INFO L158 Benchmark]: TraceAbstraction took 11631.98ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 65.7MB in the beginning and 56.3MB in the end (delta: 9.3MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,428 INFO L158 Benchmark]: Witness Printer took 80.93ms. Allocated memory is still 148.9MB. Free memory was 56.3MB in the beginning and 53.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:36:10,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 102.8MB. Free memory was 81.3MB in the beginning and 81.2MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.60ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 78.9MB in the end (delta: -14.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.58ms. Allocated memory is still 102.8MB. Free memory was 78.9MB in the beginning and 77.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.28ms. Allocated memory is still 102.8MB. Free memory was 77.6MB in the beginning and 76.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 425.83ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 66.4MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 11631.98ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 65.7MB in the beginning and 56.3MB in the end (delta: 9.3MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. * Witness Printer took 80.93ms. Allocated memory is still 148.9MB. Free memory was 56.3MB in the beginning and 53.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.5s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 485 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 445 mSDsluCounter, 1695 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1339 mSDsCounter, 590 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1429 IncrementalHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 590 mSolverCounterUnsat, 356 mSDtfsCounter, 1429 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 803 GetRequests, 645 SyntacticMatches, 15 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 57 PreInvPairs, 102 NumberOfFragments, 405 HoareAnnotationTreeSize, 57 FomulaSimplifications, 362 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2212 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 705 NumberOfCodeBlocks, 705 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 978 ConstructedInterpolants, 0 QuantifiedInterpolants, 3562 SizeOfPredicates, 16 NumberOfNonLiveVariables, 616 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2712/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((0 < buflim + 1 && buf == 0) && bufferlen == 2 + buflim) && bufferlen < inlen) && in == 0) || ((((((bufferlen + in + 1 <= buf + inlen && 2 + buflim <= bufferlen) && 1 <= in) && bufferlen <= 2 + buflim) && bufferlen < inlen) && buf + 2 <= bufferlen) && 0 <= buf) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-19 05:36:10,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f163997e-9fb4-46b6-a82b-bb635a2c80ea/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE