./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF --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 64bit --witnessprinter.graph.data.programhash 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:26:23,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:26:23,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:26:23,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:26:23,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:26:23,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:26:23,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:26:23,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:26:23,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:26:23,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:26:23,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:26:23,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:26:23,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:26:23,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:26:23,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:26:23,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:26:23,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:26:23,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:26:23,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:26:23,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:26:23,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:26:23,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:26:23,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:26:23,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:26:23,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:26:23,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:26:23,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:26:23,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:26:23,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:26:23,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:26:23,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:26:23,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:26:23,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:26:23,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:26:23,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:26:23,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:26:23,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:26:23,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:26:23,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:26:23,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:26:23,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:26:23,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-20 06:26:23,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:26:23,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:26:23,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:26:23,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:26:23,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:26:23,388 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:26:23,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:26:23,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:26:23,390 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:26:23,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:26:23,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:26:23,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:26:23,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:26:23,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:26:23,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:26:23,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:26:23,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:26:23,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:26:23,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:26:23,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:26:23,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:26:23,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:23,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:26:23,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:26:23,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:26:23,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:26:23,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:26:23,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:26:23,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:26:23,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:26:23,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:26:23,400 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_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e [2021-11-20 06:26:23,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:26:23,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:26:23,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:26:23,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:26:23,704 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:26:23,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-20 06:26:23,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/data/20f138fc1/4ffb2c1bad1f4b09bbccfaacfe328007/FLAG4770cbf0a [2021-11-20 06:26:24,712 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:26:24,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-20 06:26:24,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/data/20f138fc1/4ffb2c1bad1f4b09bbccfaacfe328007/FLAG4770cbf0a [2021-11-20 06:26:25,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/data/20f138fc1/4ffb2c1bad1f4b09bbccfaacfe328007 [2021-11-20 06:26:25,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:26:25,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:26:25,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:25,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:26:25,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:26:25,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:25" (1/1) ... [2021-11-20 06:26:25,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd82ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:25, skipping insertion in model container [2021-11-20 06:26:25,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:26:25" (1/1) ... [2021-11-20 06:26:25,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:26:25,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:26:27,605 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_0a617756-7633-4875-89c7-1393fbc4172e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-11-20 06:26:27,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:27,721 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:26:28,202 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_0a617756-7633-4875-89c7-1393fbc4172e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-11-20 06:26:28,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:26:28,309 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:26:28,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28 WrapperNode [2021-11-20 06:26:28,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:26:28,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:28,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:26:28,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:26:28,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,654 INFO L137 Inliner]: procedures = 228, calls = 2012, calls flagged for inlining = 106, calls inlined = 86, statements flattened = 2889 [2021-11-20 06:26:28,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:26:28,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:26:28,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:26:28,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:26:28,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:26:28,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:26:28,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:26:28,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:26:28,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (1/1) ... [2021-11-20 06:26:28,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:26:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:26:28,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:26:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:26:29,075 INFO L130 BoogieDeclarations]: Found specification of procedure insb [2021-11-20 06:26:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure insb [2021-11-20 06:26:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692 [2021-11-20 06:26:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692 [2021-11-20 06:26:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_clear_bchannel [2021-11-20 06:26:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_clear_bchannel [2021-11-20 06:26:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 06:26:29,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 06:26:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 06:26:29,077 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 06:26:29,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 06:26:29,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 06:26:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 06:26:29,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 06:26:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_unregister_device [2021-11-20 06:26:29,078 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_unregister_device [2021-11-20 06:26:29,078 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692 [2021-11-20 06:26:29,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692 [2021-11-20 06:26:29,079 INFO L130 BoogieDeclarations]: Found specification of procedure W6692B_interrupt [2021-11-20 06:26:29,079 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692B_interrupt [2021-11-20 06:26:29,079 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-20 06:26:29,079 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-20 06:26:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure outsb [2021-11-20 06:26:29,080 INFO L138 BoogieDeclarations]: Found implementation of procedure outsb [2021-11-20 06:26:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 06:26:29,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 06:26:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:26:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:26:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Bfifo [2021-11-20 06:26:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Bfifo [2021-11-20 06:26:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-11-20 06:26:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-11-20 06:26:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Bfifo [2021-11-20 06:26:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Bfifo [2021-11-20 06:26:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692B [2021-11-20 06:26:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692B [2021-11-20 06:26:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-20 06:26:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-20 06:26:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Dfifo [2021-11-20 06:26:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Dfifo [2021-11-20 06:26:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:26:29,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:26:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-20 06:26:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-20 06:26:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 06:26:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 06:26:29,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:26:29,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:26:29,085 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-20 06:26:29,085 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-20 06:26:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_led_handler [2021-11-20 06:26:29,086 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_led_handler [2021-11-20 06:26:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure send_next [2021-11-20 06:26:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure send_next [2021-11-20 06:26:29,087 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-20 06:26:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-20 06:26:29,088 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-20 06:26:29,089 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-20 06:26:29,089 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692B [2021-11-20 06:26:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692B [2021-11-20 06:26:29,090 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-11-20 06:26:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-11-20 06:26:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-11-20 06:26:29,091 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-11-20 06:26:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:26:29,091 INFO L130 BoogieDeclarations]: Found specification of procedure ph_command [2021-11-20 06:26:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ph_command [2021-11-20 06:26:29,092 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 06:26:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 06:26:29,093 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-20 06:26:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-20 06:26:29,094 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 06:26:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 06:26:29,094 INFO L130 BoogieDeclarations]: Found specification of procedure _set_debug [2021-11-20 06:26:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_debug [2021-11-20 06:26:29,094 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-20 06:26:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-20 06:26:29,095 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 06:26:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 06:26:29,096 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2021-11-20 06:26:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2021-11-20 06:26:29,096 INFO L130 BoogieDeclarations]: Found specification of procedure disable_hwirq [2021-11-20 06:26:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_hwirq [2021-11-20 06:26:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:26:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_probe [2021-11-20 06:26:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_probe [2021-11-20 06:26:29,097 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-20 06:26:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-20 06:26:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2021-11-20 06:26:29,098 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2021-11-20 06:26:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 06:26:29,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 06:26:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-20 06:26:29,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-20 06:26:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:26:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-11-20 06:26:29,101 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-11-20 06:26:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_3 [2021-11-20 06:26:29,101 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_3 [2021-11-20 06:26:29,102 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-20 06:26:29,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-20 06:26:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:26:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure recv_Bchannel [2021-11-20 06:26:29,103 INFO L138 BoogieDeclarations]: Found implementation of procedure recv_Bchannel [2021-11-20 06:26:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2021-11-20 06:26:29,104 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2021-11-20 06:26:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:26:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-20 06:26:29,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-20 06:26:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2021-11-20 06:26:29,105 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2021-11-20 06:26:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2021-11-20 06:26:29,106 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2021-11-20 06:26:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Dfifo [2021-11-20 06:26:29,106 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Dfifo [2021-11-20 06:26:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_mode [2021-11-20 06:26:29,106 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_mode [2021-11-20 06:26:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure get_next_dframe [2021-11-20 06:26:29,108 INFO L138 BoogieDeclarations]: Found implementation of procedure get_next_dframe [2021-11-20 06:26:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure mI_alloc_skb [2021-11-20 06:26:29,111 INFO L138 BoogieDeclarations]: Found implementation of procedure mI_alloc_skb [2021-11-20 06:26:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-11-20 06:26:29,112 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-11-20 06:26:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-11-20 06:26:29,114 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-11-20 06:26:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-20 06:26:29,115 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-20 06:26:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-11-20 06:26:29,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-11-20 06:26:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:26:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-11-20 06:26:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-11-20 06:26:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:26:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:26:29,787 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:26:29,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:26:31,116 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 06:26:33,380 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:26:33,405 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:26:33,405 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 06:26:33,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:33 BoogieIcfgContainer [2021-11-20 06:26:33,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:26:33,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:26:33,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:26:33,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:26:33,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:26:25" (1/3) ... [2021-11-20 06:26:33,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c18713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:33, skipping insertion in model container [2021-11-20 06:26:33,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:26:28" (2/3) ... [2021-11-20 06:26:33,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53c18713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:26:33, skipping insertion in model container [2021-11-20 06:26:33,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:26:33" (3/3) ... [2021-11-20 06:26:33,421 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-20 06:26:33,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:26:33,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:26:33,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:26:33,510 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 [2021-11-20 06:26:33,510 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:26:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 679 states have (on average 1.337260677466863) internal successors, (908), 713 states have internal predecessors, (908), 266 states have call successors, (266), 61 states have call predecessors, (266), 60 states have return successors, (260), 254 states have call predecessors, (260), 260 states have call successors, (260) [2021-11-20 06:26:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:26:33,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:33,586 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:33,587 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:33,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1333373833, now seen corresponding path program 1 times [2021-11-20 06:26:33,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606324041] [2021-11-20 06:26:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:33,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:26:34,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:34,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606324041] [2021-11-20 06:26:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606324041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:34,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:34,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:26:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319083995] [2021-11-20 06:26:34,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:34,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:26:34,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:26:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:26:34,499 INFO L87 Difference]: Start difference. First operand has 1007 states, 679 states have (on average 1.337260677466863) internal successors, (908), 713 states have internal predecessors, (908), 266 states have call successors, (266), 61 states have call predecessors, (266), 60 states have return successors, (260), 254 states have call predecessors, (260), 260 states have call successors, (260) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:26:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:38,399 INFO L93 Difference]: Finished difference Result 2036 states and 2922 transitions. [2021-11-20 06:26:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:26:38,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2021-11-20 06:26:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:38,440 INFO L225 Difference]: With dead ends: 2036 [2021-11-20 06:26:38,440 INFO L226 Difference]: Without dead ends: 1017 [2021-11-20 06:26:38,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:26:38,458 INFO L933 BasicCegarLoop]: 1384 mSDtfsCounter, 173 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:38,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 2692 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:26:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-11-20 06:26:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 990. [2021-11-20 06:26:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 670 states have (on average 1.326865671641791) internal successors, (889), 696 states have internal predecessors, (889), 260 states have call successors, (260), 60 states have call predecessors, (260), 59 states have return successors, (259), 253 states have call predecessors, (259), 259 states have call successors, (259) [2021-11-20 06:26:38,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1408 transitions. [2021-11-20 06:26:38,637 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1408 transitions. Word has length 63 [2021-11-20 06:26:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:38,638 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1408 transitions. [2021-11-20 06:26:38,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:26:38,639 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1408 transitions. [2021-11-20 06:26:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:26:38,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:38,651 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:38,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:26:38,652 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1007049039, now seen corresponding path program 1 times [2021-11-20 06:26:38,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:38,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776040286] [2021-11-20 06:26:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:38,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:26:39,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776040286] [2021-11-20 06:26:39,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776040286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:39,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:39,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:26:39,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767952953] [2021-11-20 06:26:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:39,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:26:39,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:26:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:26:39,055 INFO L87 Difference]: Start difference. First operand 990 states and 1408 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:26:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:42,412 INFO L93 Difference]: Finished difference Result 2658 states and 3786 transitions. [2021-11-20 06:26:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2021-11-20 06:26:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:42,430 INFO L225 Difference]: With dead ends: 2658 [2021-11-20 06:26:42,430 INFO L226 Difference]: Without dead ends: 1677 [2021-11-20 06:26:42,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:26:42,438 INFO L933 BasicCegarLoop]: 1553 mSDtfsCounter, 1293 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:42,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 3492 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-20 06:26:42,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-11-20 06:26:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1624. [2021-11-20 06:26:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1110 states have (on average 1.3423423423423424) internal successors, (1490), 1160 states have internal predecessors, (1490), 413 states have call successors, (413), 101 states have call predecessors, (413), 100 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-20 06:26:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2315 transitions. [2021-11-20 06:26:42,547 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2315 transitions. Word has length 63 [2021-11-20 06:26:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:42,548 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2315 transitions. [2021-11-20 06:26:42,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:26:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2315 transitions. [2021-11-20 06:26:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:26:42,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:42,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:42,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:26:42,553 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:42,554 INFO L85 PathProgramCache]: Analyzing trace with hash -303802206, now seen corresponding path program 1 times [2021-11-20 06:26:42,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:42,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380003957] [2021-11-20 06:26:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:42,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:26:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-20 06:26:42,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:42,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380003957] [2021-11-20 06:26:42,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380003957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:42,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:42,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:26:42,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640113487] [2021-11-20 06:26:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:42,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:26:42,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:26:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:26:42,890 INFO L87 Difference]: Start difference. First operand 1624 states and 2315 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:26:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:46,303 INFO L93 Difference]: Finished difference Result 3279 states and 4680 transitions. [2021-11-20 06:26:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:26:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 93 [2021-11-20 06:26:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:46,321 INFO L225 Difference]: With dead ends: 3279 [2021-11-20 06:26:46,321 INFO L226 Difference]: Without dead ends: 1673 [2021-11-20 06:26:46,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:26:46,334 INFO L933 BasicCegarLoop]: 1362 mSDtfsCounter, 171 mSDsluCounter, 2528 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 3890 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:46,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 3890 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-20 06:26:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-11-20 06:26:46,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1624. [2021-11-20 06:26:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1110 states have (on average 1.3414414414414415) internal successors, (1489), 1160 states have internal predecessors, (1489), 413 states have call successors, (413), 101 states have call predecessors, (413), 100 states have return successors, (412), 400 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-20 06:26:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2314 transitions. [2021-11-20 06:26:46,430 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2314 transitions. Word has length 93 [2021-11-20 06:26:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:46,431 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2314 transitions. [2021-11-20 06:26:46,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 06:26:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2314 transitions. [2021-11-20 06:26:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 06:26:46,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:46,436 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:46,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:26:46,436 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -822775061, now seen corresponding path program 1 times [2021-11-20 06:26:46,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:46,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131132260] [2021-11-20 06:26:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:46,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:26:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:26:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:46,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-20 06:26:47,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:47,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131132260] [2021-11-20 06:26:47,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131132260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:47,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:47,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:26:47,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887222562] [2021-11-20 06:26:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:47,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:26:47,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:47,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:26:47,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:26:47,024 INFO L87 Difference]: Start difference. First operand 1624 states and 2314 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:26:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:50,734 INFO L93 Difference]: Finished difference Result 1712 states and 2419 transitions. [2021-11-20 06:26:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:26:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2021-11-20 06:26:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:50,750 INFO L225 Difference]: With dead ends: 1712 [2021-11-20 06:26:50,751 INFO L226 Difference]: Without dead ends: 1709 [2021-11-20 06:26:50,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:26:50,754 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 556 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 3508 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-20 06:26:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-11-20 06:26:50,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1658. [2021-11-20 06:26:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1133 states have (on average 1.3353927625772286) internal successors, (1513), 1183 states have internal predecessors, (1513), 416 states have call successors, (416), 109 states have call predecessors, (416), 108 states have return successors, (415), 403 states have call predecessors, (415), 415 states have call successors, (415) [2021-11-20 06:26:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2344 transitions. [2021-11-20 06:26:50,848 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2344 transitions. Word has length 110 [2021-11-20 06:26:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:50,849 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2344 transitions. [2021-11-20 06:26:50,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:26:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2344 transitions. [2021-11-20 06:26:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:26:50,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:50,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:50,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:26:50,853 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1844805629, now seen corresponding path program 1 times [2021-11-20 06:26:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078278878] [2021-11-20 06:26:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:50,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-20 06:26:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:26:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:26:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:26:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:26:51,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:51,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078278878] [2021-11-20 06:26:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078278878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:51,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:51,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:26:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678111319] [2021-11-20 06:26:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:51,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:51,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:51,272 INFO L87 Difference]: Start difference. First operand 1658 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:26:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:26:58,930 INFO L93 Difference]: Finished difference Result 5090 states and 7224 transitions. [2021-11-20 06:26:58,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:26:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2021-11-20 06:26:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:26:58,968 INFO L225 Difference]: With dead ends: 5090 [2021-11-20 06:26:58,969 INFO L226 Difference]: Without dead ends: 3455 [2021-11-20 06:26:58,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:26:58,984 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 2326 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 1569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 5888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1569 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:26:58,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 5756 Invalid, 5888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1569 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 06:26:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2021-11-20 06:26:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3338. [2021-11-20 06:26:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2276 states have (on average 1.3339191564147628) internal successors, (3036), 2378 states have internal predecessors, (3036), 844 states have call successors, (844), 216 states have call predecessors, (844), 217 states have return successors, (850), 819 states have call predecessors, (850), 843 states have call successors, (850) [2021-11-20 06:26:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4730 transitions. [2021-11-20 06:26:59,216 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4730 transitions. Word has length 111 [2021-11-20 06:26:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:26:59,218 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 4730 transitions. [2021-11-20 06:26:59,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:26:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4730 transitions. [2021-11-20 06:26:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 06:26:59,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:26:59,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:26:59,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:26:59,226 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:26:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:26:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1092190682, now seen corresponding path program 1 times [2021-11-20 06:26:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:26:59,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667614546] [2021-11-20 06:26:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:26:59,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:26:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:26:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:26:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:26:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:26:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-20 06:26:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:26:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:26:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-20 06:26:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:26:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:26:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:26:59,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:26:59,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667614546] [2021-11-20 06:26:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667614546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:26:59,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:26:59,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:26:59,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793433744] [2021-11-20 06:26:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:26:59,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:26:59,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:26:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:26:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:26:59,641 INFO L87 Difference]: Start difference. First operand 3338 states and 4730 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:08,706 INFO L93 Difference]: Finished difference Result 10212 states and 14494 transitions. [2021-11-20 06:27:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2021-11-20 06:27:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:08,777 INFO L225 Difference]: With dead ends: 10212 [2021-11-20 06:27:08,777 INFO L226 Difference]: Without dead ends: 6897 [2021-11-20 06:27:08,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:27:08,804 INFO L933 BasicCegarLoop]: 1441 mSDtfsCounter, 2326 mSDsluCounter, 4312 mSDsCounter, 0 mSdLazyCounter, 4314 mSolverCounterSat, 1572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2575 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 5886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1572 IncrementalHoareTripleChecker+Valid, 4314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:08,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2575 Valid, 5753 Invalid, 5886 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1572 Valid, 4314 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 06:27:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-11-20 06:27:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 6666. [2021-11-20 06:27:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6666 states, 4548 states have (on average 1.3326737027264732) internal successors, (6061), 4752 states have internal predecessors, (6061), 1682 states have call successors, (1682), 432 states have call predecessors, (1682), 435 states have return successors, (1707), 1633 states have call predecessors, (1707), 1681 states have call successors, (1707) [2021-11-20 06:27:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6666 states to 6666 states and 9450 transitions. [2021-11-20 06:27:09,357 INFO L78 Accepts]: Start accepts. Automaton has 6666 states and 9450 transitions. Word has length 109 [2021-11-20 06:27:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:09,358 INFO L470 AbstractCegarLoop]: Abstraction has 6666 states and 9450 transitions. [2021-11-20 06:27:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 4 states have internal predecessors, (56), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6666 states and 9450 transitions. [2021-11-20 06:27:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 06:27:09,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:09,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:09,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:27:09,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash -510546839, now seen corresponding path program 1 times [2021-11-20 06:27:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:09,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914582906] [2021-11-20 06:27:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:09,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:27:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:27:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:27:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:27:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:09,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:09,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914582906] [2021-11-20 06:27:09,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914582906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:09,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:09,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:27:09,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99490793] [2021-11-20 06:27:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:09,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:09,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:09,779 INFO L87 Difference]: Start difference. First operand 6666 states and 9450 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:16,964 INFO L93 Difference]: Finished difference Result 20446 states and 29007 transitions. [2021-11-20 06:27:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:16,965 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2021-11-20 06:27:16,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:17,083 INFO L225 Difference]: With dead ends: 20446 [2021-11-20 06:27:17,084 INFO L226 Difference]: Without dead ends: 13803 [2021-11-20 06:27:17,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:27:17,131 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 2319 mSDsluCounter, 4063 mSDsCounter, 0 mSdLazyCounter, 4298 mSolverCounterSat, 1636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2568 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 5934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1636 IncrementalHoareTripleChecker+Valid, 4298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:17,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2568 Valid, 5436 Invalid, 5934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1636 Valid, 4298 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 06:27:17,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13803 states. [2021-11-20 06:27:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13803 to 13344. [2021-11-20 06:27:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13344 states, 9110 states have (on average 1.3313940724478595) internal successors, (12129), 9518 states have internal predecessors, (12129), 3358 states have call successors, (3358), 868 states have call predecessors, (3358), 875 states have return successors, (3438), 3261 states have call predecessors, (3438), 3357 states have call successors, (3438) [2021-11-20 06:27:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13344 states to 13344 states and 18925 transitions. [2021-11-20 06:27:18,133 INFO L78 Accepts]: Start accepts. Automaton has 13344 states and 18925 transitions. Word has length 110 [2021-11-20 06:27:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:18,134 INFO L470 AbstractCegarLoop]: Abstraction has 13344 states and 18925 transitions. [2021-11-20 06:27:18,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 13344 states and 18925 transitions. [2021-11-20 06:27:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-20 06:27:18,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:18,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:18,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:27:18,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash -641074778, now seen corresponding path program 1 times [2021-11-20 06:27:18,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:18,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997179393] [2021-11-20 06:27:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:18,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-20 06:27:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-20 06:27:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:27:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:27:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:18,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997179393] [2021-11-20 06:27:18,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997179393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:18,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:18,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 06:27:18,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025546727] [2021-11-20 06:27:18,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:18,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:18,498 INFO L87 Difference]: Start difference. First operand 13344 states and 18925 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:25,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:25,883 INFO L93 Difference]: Finished difference Result 39837 states and 56483 transitions. [2021-11-20 06:27:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:25,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2021-11-20 06:27:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:26,030 INFO L225 Difference]: With dead ends: 39837 [2021-11-20 06:27:26,031 INFO L226 Difference]: Without dead ends: 26516 [2021-11-20 06:27:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:27:26,093 INFO L933 BasicCegarLoop]: 2063 mSDtfsCounter, 2100 mSDsluCounter, 4776 mSDsCounter, 0 mSdLazyCounter, 4460 mSolverCounterSat, 1662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2350 SdHoareTripleChecker+Valid, 6839 SdHoareTripleChecker+Invalid, 6122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1662 IncrementalHoareTripleChecker+Valid, 4460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:26,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2350 Valid, 6839 Invalid, 6122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1662 Valid, 4460 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-20 06:27:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26516 states. [2021-11-20 06:27:27,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26516 to 25443. [2021-11-20 06:27:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25443 states, 17362 states have (on average 1.3309526552240525) internal successors, (23108), 18170 states have internal predecessors, (23108), 6403 states have call successors, (6403), 1662 states have call predecessors, (6403), 1677 states have return successors, (6631), 6182 states have call predecessors, (6631), 6402 states have call successors, (6631) [2021-11-20 06:27:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25443 states to 25443 states and 36142 transitions. [2021-11-20 06:27:27,677 INFO L78 Accepts]: Start accepts. Automaton has 25443 states and 36142 transitions. Word has length 108 [2021-11-20 06:27:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:27,678 INFO L470 AbstractCegarLoop]: Abstraction has 25443 states and 36142 transitions. [2021-11-20 06:27:27,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 4 states have internal predecessors, (55), 3 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:27:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 25443 states and 36142 transitions. [2021-11-20 06:27:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:27:27,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:27,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:27,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:27:27,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1433760259, now seen corresponding path program 1 times [2021-11-20 06:27:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513011950] [2021-11-20 06:27:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-20 06:27:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-20 06:27:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-20 06:27:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-20 06:27:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-20 06:27:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 06:27:28,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:28,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513011950] [2021-11-20 06:27:28,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513011950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:28,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24191646] [2021-11-20 06:27:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:28,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:28,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:27:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2833 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:28,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:29,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24191646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:29,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:29,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-11-20 06:27:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539307864] [2021-11-20 06:27:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:29,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:27:29,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:29,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:27:29,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:27:29,109 INFO L87 Difference]: Start difference. First operand 25443 states and 36142 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:30,788 INFO L93 Difference]: Finished difference Result 63403 states and 90066 transitions. [2021-11-20 06:27:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:30,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 121 [2021-11-20 06:27:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:31,008 INFO L225 Difference]: With dead ends: 63403 [2021-11-20 06:27:31,008 INFO L226 Difference]: Without dead ends: 37983 [2021-11-20 06:27:31,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:27:31,113 INFO L933 BasicCegarLoop]: 2308 mSDtfsCounter, 1429 mSDsluCounter, 10623 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 12931 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:31,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 12931 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37983 states. [2021-11-20 06:27:33,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37983 to 33770. [2021-11-20 06:27:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33770 states, 23105 states have (on average 1.3281973598788142) internal successors, (30688), 24133 states have internal predecessors, (30688), 8428 states have call successors, (8428), 2197 states have call predecessors, (8428), 2236 states have return successors, (8863), 8153 states have call predecessors, (8863), 8427 states have call successors, (8863) [2021-11-20 06:27:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33770 states to 33770 states and 47979 transitions. [2021-11-20 06:27:33,303 INFO L78 Accepts]: Start accepts. Automaton has 33770 states and 47979 transitions. Word has length 121 [2021-11-20 06:27:33,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:33,303 INFO L470 AbstractCegarLoop]: Abstraction has 33770 states and 47979 transitions. [2021-11-20 06:27:33,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 33770 states and 47979 transitions. [2021-11-20 06:27:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 06:27:33,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:33,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:33,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:33,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:33,521 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1146089900, now seen corresponding path program 1 times [2021-11-20 06:27:33,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:33,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538981399] [2021-11-20 06:27:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:33,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:27:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-20 06:27:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:27:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-20 06:27:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-20 06:27:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:34,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:34,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538981399] [2021-11-20 06:27:34,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538981399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584751976] [2021-11-20 06:27:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:34,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:34,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:34,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:27:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2835 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:35,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:35,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584751976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:35,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:35,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 06:27:35,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497526637] [2021-11-20 06:27:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:35,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:27:35,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:35,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:27:35,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:27:35,308 INFO L87 Difference]: Start difference. First operand 33770 states and 47979 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:37,350 INFO L93 Difference]: Finished difference Result 84081 states and 119456 transitions. [2021-11-20 06:27:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 122 [2021-11-20 06:27:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:37,652 INFO L225 Difference]: With dead ends: 84081 [2021-11-20 06:27:37,652 INFO L226 Difference]: Without dead ends: 50334 [2021-11-20 06:27:37,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:27:37,793 INFO L933 BasicCegarLoop]: 2385 mSDtfsCounter, 1429 mSDsluCounter, 10919 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 13304 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:37,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 13304 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50334 states. [2021-11-20 06:27:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50334 to 42137. [2021-11-20 06:27:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42137 states, 28872 states have (on average 1.326267664172901) internal successors, (38292), 30144 states have internal predecessors, (38292), 10453 states have call successors, (10453), 2732 states have call predecessors, (10453), 2811 states have return successors, (11103), 10116 states have call predecessors, (11103), 10452 states have call successors, (11103) [2021-11-20 06:27:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42137 states to 42137 states and 59848 transitions. [2021-11-20 06:27:40,039 INFO L78 Accepts]: Start accepts. Automaton has 42137 states and 59848 transitions. Word has length 122 [2021-11-20 06:27:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:40,040 INFO L470 AbstractCegarLoop]: Abstraction has 42137 states and 59848 transitions. [2021-11-20 06:27:40,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 42137 states and 59848 transitions. [2021-11-20 06:27:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-20 06:27:40,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:40,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:40,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:40,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:27:40,262 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1389366230, now seen corresponding path program 1 times [2021-11-20 06:27:40,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:40,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200265052] [2021-11-20 06:27:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:40,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:27:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:27:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-20 06:27:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-11-20 06:27:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-11-20 06:27:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:40,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200265052] [2021-11-20 06:27:40,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200265052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:40,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112928631] [2021-11-20 06:27:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:40,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:40,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:40,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:40,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:27:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2837 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:41,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:41,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:41,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112928631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:41,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:41,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 06:27:41,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640434712] [2021-11-20 06:27:41,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:41,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:27:41,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:27:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:27:41,828 INFO L87 Difference]: Start difference. First operand 42137 states and 59848 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:43,828 INFO L93 Difference]: Finished difference Result 100796 states and 143164 transitions. [2021-11-20 06:27:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 123 [2021-11-20 06:27:43,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:44,097 INFO L225 Difference]: With dead ends: 100796 [2021-11-20 06:27:44,097 INFO L226 Difference]: Without dead ends: 58682 [2021-11-20 06:27:44,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:27:44,231 INFO L933 BasicCegarLoop]: 2389 mSDtfsCounter, 1429 mSDsluCounter, 10935 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 13324 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:44,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 13324 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58682 states. [2021-11-20 06:27:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58682 to 42169. [2021-11-20 06:27:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42169 states, 28896 states have (on average 1.3259966777408638) internal successors, (38316), 30168 states have internal predecessors, (38316), 10453 states have call successors, (10453), 2732 states have call predecessors, (10453), 2819 states have return successors, (11115), 10124 states have call predecessors, (11115), 10452 states have call successors, (11115) [2021-11-20 06:27:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42169 states to 42169 states and 59884 transitions. [2021-11-20 06:27:46,136 INFO L78 Accepts]: Start accepts. Automaton has 42169 states and 59884 transitions. Word has length 123 [2021-11-20 06:27:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 42169 states and 59884 transitions. [2021-11-20 06:27:46,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 42169 states and 59884 transitions. [2021-11-20 06:27:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:27:46,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:46,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:46,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:27:46,370 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2081669403, now seen corresponding path program 1 times [2021-11-20 06:27:46,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217425202] [2021-11-20 06:27:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:46,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:27:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-20 06:27:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-20 06:27:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:27:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:27:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:46,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217425202] [2021-11-20 06:27:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217425202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202600491] [2021-11-20 06:27:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:46,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:47,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:27:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:27:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:27:47,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:47,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202600491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:47,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:47,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-11-20 06:27:47,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988453102] [2021-11-20 06:27:47,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:47,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:27:47,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:27:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:27:47,991 INFO L87 Difference]: Start difference. First operand 42169 states and 59884 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:49,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:49,823 INFO L93 Difference]: Finished difference Result 100844 states and 143216 transitions. [2021-11-20 06:27:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:49,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 124 [2021-11-20 06:27:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:50,023 INFO L225 Difference]: With dead ends: 100844 [2021-11-20 06:27:50,024 INFO L226 Difference]: Without dead ends: 58698 [2021-11-20 06:27:50,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:27:50,149 INFO L933 BasicCegarLoop]: 2389 mSDtfsCounter, 1429 mSDsluCounter, 10935 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 13324 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:50,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 13324 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58698 states. [2021-11-20 06:27:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58698 to 42189. [2021-11-20 06:27:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42189 states, 28912 states have (on average 1.3258162700608744) internal successors, (38332), 30180 states have internal predecessors, (38332), 10453 states have call successors, (10453), 2732 states have call predecessors, (10453), 2823 states have return successors, (11119), 10132 states have call predecessors, (11119), 10452 states have call successors, (11119) [2021-11-20 06:27:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42189 states to 42189 states and 59904 transitions. [2021-11-20 06:27:51,959 INFO L78 Accepts]: Start accepts. Automaton has 42189 states and 59904 transitions. Word has length 124 [2021-11-20 06:27:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:51,959 INFO L470 AbstractCegarLoop]: Abstraction has 42189 states and 59904 transitions. [2021-11-20 06:27:51,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 06:27:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 42189 states and 59904 transitions. [2021-11-20 06:27:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 06:27:51,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:51,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:51,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:52,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,190 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:27:52,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1099705029, now seen corresponding path program 1 times [2021-11-20 06:27:52,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674873718] [2021-11-20 06:27:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:27:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:27:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:27:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-20 06:27:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-20 06:27:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-20 06:27:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-20 06:27:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:27:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-20 06:27:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-20 06:27:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:27:52,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:52,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674873718] [2021-11-20 06:27:52,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674873718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473644649] [2021-11-20 06:27:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:52,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:52,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:27:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 2918 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:27:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:27:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 06:27:54,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473644649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:54,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:54,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2021-11-20 06:27:54,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672188342] [2021-11-20 06:27:54,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:54,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:27:54,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:27:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:27:54,754 INFO L87 Difference]: Start difference. First operand 42189 states and 59904 transitions. Second operand has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 15 states have internal predecessors, (132), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:28:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:43,879 INFO L93 Difference]: Finished difference Result 128136 states and 181928 transitions. [2021-11-20 06:28:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-20 06:28:43,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 15 states have internal predecessors, (132), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 137 [2021-11-20 06:28:43,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:44,250 INFO L225 Difference]: With dead ends: 128136 [2021-11-20 06:28:44,250 INFO L226 Difference]: Without dead ends: 85606 [2021-11-20 06:28:44,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6695 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2752, Invalid=15338, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 06:28:44,660 INFO L933 BasicCegarLoop]: 3639 mSDtfsCounter, 9758 mSDsluCounter, 22228 mSDsCounter, 0 mSdLazyCounter, 38804 mSolverCounterSat, 8766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10123 SdHoareTripleChecker+Valid, 25867 SdHoareTripleChecker+Invalid, 47570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 8766 IncrementalHoareTripleChecker+Valid, 38804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:44,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10123 Valid, 25867 Invalid, 47570 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [8766 Valid, 38804 Invalid, 0 Unknown, 0 Unchecked, 41.4s Time] [2021-11-20 06:28:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85606 states. [2021-11-20 06:28:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85606 to 70736. [2021-11-20 06:28:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70736 states, 48405 states have (on average 1.3230451399648797) internal successors, (64042), 50455 states have internal predecessors, (64042), 17642 states have call successors, (17642), 4555 states have call predecessors, (17642), 4688 states have return successors, (18737), 17108 states have call predecessors, (18737), 17641 states have call successors, (18737) [2021-11-20 06:28:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70736 states to 70736 states and 100421 transitions. [2021-11-20 06:28:48,162 INFO L78 Accepts]: Start accepts. Automaton has 70736 states and 100421 transitions. Word has length 137 [2021-11-20 06:28:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:48,163 INFO L470 AbstractCegarLoop]: Abstraction has 70736 states and 100421 transitions. [2021-11-20 06:28:48,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.739130434782608) internal successors, (132), 15 states have internal predecessors, (132), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:28:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 70736 states and 100421 transitions. [2021-11-20 06:28:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:28:48,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:48,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:48,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 06:28:48,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:48,386 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:48,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1301618223, now seen corresponding path program 1 times [2021-11-20 06:28:48,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:48,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052628256] [2021-11-20 06:28:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:48,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:28:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:28:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:28:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:28:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:28:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-20 06:28:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-20 06:28:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-20 06:28:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-20 06:28:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:28:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-20 06:28:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-11-20 06:28:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:28:48,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052628256] [2021-11-20 06:28:48,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052628256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380988543] [2021-11-20 06:28:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:48,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:48,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:48,798 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:48,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:28:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2920 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:28:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:28:50,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 06:28:50,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380988543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:50,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:50,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2021-11-20 06:28:50,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276019671] [2021-11-20 06:28:50,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:50,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:28:50,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:28:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:28:50,722 INFO L87 Difference]: Start difference. First operand 70736 states and 100421 transitions. Second operand has 23 states, 23 states have (on average 5.826086956521739) internal successors, (134), 15 states have internal predecessors, (134), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:29:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:46,724 INFO L93 Difference]: Finished difference Result 207060 states and 293357 transitions. [2021-11-20 06:29:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-20 06:29:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.826086956521739) internal successors, (134), 15 states have internal predecessors, (134), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 138 [2021-11-20 06:29:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:47,377 INFO L225 Difference]: With dead ends: 207060 [2021-11-20 06:29:47,377 INFO L226 Difference]: Without dead ends: 135773 [2021-11-20 06:29:47,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6809 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2752, Invalid=15338, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 06:29:47,613 INFO L933 BasicCegarLoop]: 3048 mSDtfsCounter, 8269 mSDsluCounter, 24065 mSDsCounter, 0 mSdLazyCounter, 43747 mSolverCounterSat, 6187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8632 SdHoareTripleChecker+Valid, 27113 SdHoareTripleChecker+Invalid, 49934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 6187 IncrementalHoareTripleChecker+Valid, 43747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:47,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8632 Valid, 27113 Invalid, 49934 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [6187 Valid, 43747 Invalid, 0 Unknown, 0 Unchecked, 46.5s Time] [2021-11-20 06:29:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135773 states. [2021-11-20 06:29:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135773 to 112564. [2021-11-20 06:29:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112564 states, 77092 states have (on average 1.3209282415814871) internal successors, (101833), 80256 states have internal predecessors, (101833), 27969 states have call successors, (27969), 7318 states have call predecessors, (27969), 7502 states have return successors, (29603), 27119 states have call predecessors, (29603), 27968 states have call successors, (29603) [2021-11-20 06:29:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112564 states to 112564 states and 159405 transitions. [2021-11-20 06:29:53,750 INFO L78 Accepts]: Start accepts. Automaton has 112564 states and 159405 transitions. Word has length 138 [2021-11-20 06:29:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 112564 states and 159405 transitions. [2021-11-20 06:29:53,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.826086956521739) internal successors, (134), 15 states have internal predecessors, (134), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:29:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 112564 states and 159405 transitions. [2021-11-20 06:29:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 06:29:53,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:53,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:53,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:53,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:29:53,974 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:29:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 326218014, now seen corresponding path program 1 times [2021-11-20 06:29:53,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832710351] [2021-11-20 06:29:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:29:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:29:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:29:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:29:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:29:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-20 06:29:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-20 06:29:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-20 06:29:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:29:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-20 06:29:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-20 06:29:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 06:29:54,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:54,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832710351] [2021-11-20 06:29:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832710351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:54,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129706786] [2021-11-20 06:29:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:54,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:54,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:54,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:54,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:29:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:29:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:29:55,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-20 06:29:56,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129706786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:56,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:56,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2021-11-20 06:29:56,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453970906] [2021-11-20 06:29:56,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:56,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:29:56,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:56,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:29:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:29:56,232 INFO L87 Difference]: Start difference. First operand 112564 states and 159405 transitions. Second operand has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 15 states have internal predecessors, (136), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:30:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:40,693 INFO L93 Difference]: Finished difference Result 293360 states and 414488 transitions. [2021-11-20 06:30:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-20 06:30:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 15 states have internal predecessors, (136), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) Word has length 139 [2021-11-20 06:30:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:41,887 INFO L225 Difference]: With dead ends: 293360 [2021-11-20 06:30:41,887 INFO L226 Difference]: Without dead ends: 179993 [2021-11-20 06:30:42,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6850 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2752, Invalid=15338, Unknown=0, NotChecked=0, Total=18090 [2021-11-20 06:30:42,253 INFO L933 BasicCegarLoop]: 3040 mSDtfsCounter, 11479 mSDsluCounter, 18562 mSDsCounter, 0 mSdLazyCounter, 30892 mSolverCounterSat, 9965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11842 SdHoareTripleChecker+Valid, 21602 SdHoareTripleChecker+Invalid, 40857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 9965 IncrementalHoareTripleChecker+Valid, 30892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:42,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11842 Valid, 21602 Invalid, 40857 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [9965 Valid, 30892 Invalid, 0 Unknown, 0 Unchecked, 32.3s Time] [2021-11-20 06:30:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179993 states. [2021-11-20 06:30:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179993 to 148279. [2021-11-20 06:30:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148279 states, 101525 states have (on average 1.3191430682098007) internal successors, (133926), 105545 states have internal predecessors, (133926), 36846 states have call successors, (36846), 9735 states have call predecessors, (36846), 9907 states have return successors, (38619), 35759 states have call predecessors, (38619), 36845 states have call successors, (38619) [2021-11-20 06:30:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148279 states to 148279 states and 209391 transitions. [2021-11-20 06:30:50,810 INFO L78 Accepts]: Start accepts. Automaton has 148279 states and 209391 transitions. Word has length 139 [2021-11-20 06:30:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:50,811 INFO L470 AbstractCegarLoop]: Abstraction has 148279 states and 209391 transitions. [2021-11-20 06:30:50,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.913043478260869) internal successors, (136), 15 states have internal predecessors, (136), 5 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (23), 6 states have call predecessors, (23), 5 states have call successors, (23) [2021-11-20 06:30:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 148279 states and 209391 transitions. [2021-11-20 06:30:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-20 06:30:50,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:50,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:50,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:30:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a617756-7633-4875-89c7-1393fbc4172e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:30:51,063 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:30:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1920099689, now seen corresponding path program 1 times [2021-11-20 06:30:51,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:51,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673288462] [2021-11-20 06:30:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:51,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:30:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 06:30:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-20 06:30:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-20 06:30:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-20 06:30:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 06:30:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-20 06:30:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-20 06:30:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-20 06:30:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 06:30:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-20 06:30:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-20 06:30:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-20 06:30:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-20 06:30:51,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-20 06:30:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-20 06:30:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-11-20 06:30:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2021-11-20 06:30:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-20 06:30:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-11-20 06:30:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2021-11-20 06:30:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 06:30:51,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:51,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673288462] [2021-11-20 06:30:51,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673288462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:51,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:51,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:30:51,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896641676] [2021-11-20 06:30:51,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:51,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:30:51,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:30:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:30:51,653 INFO L87 Difference]: Start difference. First operand 148279 states and 209391 transitions. Second operand has 9 states, 9 states have (on average 17.333333333333332) internal successors, (156), 3 states have internal predecessors, (156), 2 states have call successors, (31), 8 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26)