./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc --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 c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:05:03,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:05:03,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:05:03,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:05:03,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:05:03,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:05:03,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:05:03,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:05:03,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:05:03,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:05:03,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:05:03,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:05:03,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:05:03,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:05:03,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:05:03,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:05:03,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:05:03,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:05:03,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:05:03,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:05:03,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:05:03,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:05:03,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:05:03,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:05:03,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:05:03,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:05:03,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:05:03,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:05:03,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:05:03,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:05:03,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:05:03,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:05:03,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:05:03,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:05:03,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:05:03,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:05:03,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:05:03,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:05:03,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:05:03,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:05:03,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:05:03,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 21:05:03,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:05:03,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:05:03,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:05:03,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:05:03,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:05:03,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:05:03,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:05:03,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:05:03,436 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:05:03,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:05:03,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:05:03,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:05:03,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:05:03,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:05:03,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:05:03,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:05:03,439 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:05:03,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:05:03,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:05:03,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:05:03,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:05:03,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:03,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:05:03,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:05:03,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:05:03,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:05:03,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:05:03,441 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:05:03,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:05:03,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:05:03,442 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_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 [2022-11-02 21:05:03,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:05:03,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:05:03,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:05:03,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:05:03,782 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:05:03,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-11-02 21:05:03,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/data/64b2204c3/07c2ea464d584508978a20ab0ccd0721/FLAGc841ce915 [2022-11-02 21:05:04,620 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:05:04,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-11-02 21:05:04,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/data/64b2204c3/07c2ea464d584508978a20ab0ccd0721/FLAGc841ce915 [2022-11-02 21:05:04,738 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/data/64b2204c3/07c2ea464d584508978a20ab0ccd0721 [2022-11-02 21:05:04,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:05:04,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:05:04,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:04,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:05:04,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:05:04,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:04" (1/1) ... [2022-11-02 21:05:04,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b23bf5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:04, skipping insertion in model container [2022-11-02 21:05:04,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:04" (1/1) ... [2022-11-02 21:05:04,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:05:04,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:05:05,315 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2022-11-02 21:05:05,315 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2022-11-02 21:05:05,471 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_d2826583-94ce-46e8-916b-80afc549df44/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2022-11-02 21:05:05,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:05,796 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:05:05,870 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2022-11-02 21:05:05,870 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2022-11-02 21:05:05,880 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_d2826583-94ce-46e8-916b-80afc549df44/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2022-11-02 21:05:05,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:05,965 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:05:05,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05 WrapperNode [2022-11-02 21:05:05,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:05,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:05,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:05:05,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:05:05,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,085 INFO L138 Inliner]: procedures = 114, calls = 288, calls flagged for inlining = 49, calls inlined = 38, statements flattened = 878 [2022-11-02 21:05:06,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:06,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:05:06,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:05:06,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:05:06,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:05:06,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:05:06,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:05:06,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:05:06,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (1/1) ... [2022-11-02 21:05:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:06,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:06,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:05:06,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:05:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_stop_kthread [2022-11-02 21:05:06,282 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_stop_kthread [2022-11-02 21:05:06,282 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_lock [2022-11-02 21:05:06,283 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_lock [2022-11-02 21:05:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-02 21:05:06,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-02 21:05:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:05:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_delay [2022-11-02 21:05:06,283 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_delay [2022-11-02 21:05:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-02 21:05:06,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-02 21:05:06,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-02 21:05:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-02 21:05:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_create_kthread [2022-11-02 21:05:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_create_kthread [2022-11-02 21:05:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock [2022-11-02 21:05:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock [2022-11-02 21:05:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-02 21:05:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-02 21:05:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-02 21:05:06,284 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-02 21:05:06,284 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_spin_write_unlock_irq [2022-11-02 21:05:06,285 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_spin_write_unlock_irq [2022-11-02 21:05:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:05:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-02 21:05:06,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-02 21:05:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure torture_random [2022-11-02 21:05:06,285 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_random [2022-11-02 21:05:06,285 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_cleanup [2022-11-02 21:05:06,285 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_cleanup [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure torture_init_end [2022-11-02 21:05:06,286 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_init_end [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 21:05:06,286 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2022-11-02 21:05:06,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:05:06,286 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-02 21:05:06,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_stats_print [2022-11-02 21:05:06,287 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_stats_print [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-02 21:05:06,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-02 21:05:06,287 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock_irq [2022-11-02 21:05:06,288 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock_irq [2022-11-02 21:05:06,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:05:06,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 21:05:06,288 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_delay [2022-11-02 21:05:06,288 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_delay [2022-11-02 21:05:06,288 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-02 21:05:06,288 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-02 21:05:06,288 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_unlock [2022-11-02 21:05:06,288 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_unlock [2022-11-02 21:05:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_print_module_parms [2022-11-02 21:05:06,289 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_print_module_parms [2022-11-02 21:05:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:05:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-02 21:05:06,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-02 21:05:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_unlock [2022-11-02 21:05:06,289 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_unlock [2022-11-02 21:05:06,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:05:06,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:05:06,545 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:05:06,552 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:05:06,725 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-02 21:05:07,499 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:05:07,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:05:07,518 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 21:05:07,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:07 BoogieIcfgContainer [2022-11-02 21:05:07,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:05:07,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:05:07,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:05:07,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:05:07,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:05:04" (1/3) ... [2022-11-02 21:05:07,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8594866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:07, skipping insertion in model container [2022-11-02 21:05:07,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:05" (2/3) ... [2022-11-02 21:05:07,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8594866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:07, skipping insertion in model container [2022-11-02 21:05:07,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:07" (3/3) ... [2022-11-02 21:05:07,533 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-11-02 21:05:07,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:05:07,552 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:05:07,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:05:07,648 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f3653b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:05:07,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:05:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 258 states have (on average 1.4108527131782946) internal successors, (364), 274 states have internal predecessors, (364), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-11-02 21:05:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 21:05:07,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:07,671 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:07,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:07,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1909877325, now seen corresponding path program 1 times [2022-11-02 21:05:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:07,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685919608] [2022-11-02 21:05:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:07,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 21:05:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:08,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685919608] [2022-11-02 21:05:08,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685919608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:08,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:08,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:05:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197071774] [2022-11-02 21:05:08,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:08,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:05:08,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:05:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:05:08,351 INFO L87 Difference]: Start difference. First operand has 347 states, 258 states have (on average 1.4108527131782946) internal successors, (364), 274 states have internal predecessors, (364), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:09,608 INFO L93 Difference]: Finished difference Result 1016 states and 1435 transitions. [2022-11-02 21:05:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:05:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-11-02 21:05:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:09,631 INFO L225 Difference]: With dead ends: 1016 [2022-11-02 21:05:09,631 INFO L226 Difference]: Without dead ends: 571 [2022-11-02 21:05:09,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:09,648 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 595 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:09,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 938 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:05:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-02 21:05:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 524. [2022-11-02 21:05:09,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 397 states have (on average 1.3778337531486147) internal successors, (547), 408 states have internal predecessors, (547), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-02 21:05:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 714 transitions. [2022-11-02 21:05:09,764 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 714 transitions. Word has length 45 [2022-11-02 21:05:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:09,765 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 714 transitions. [2022-11-02 21:05:09,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 714 transitions. [2022-11-02 21:05:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 21:05:09,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:09,769 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:05:09,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1822185999, now seen corresponding path program 1 times [2022-11-02 21:05:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135055405] [2022-11-02 21:05:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:10,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:05:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:10,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135055405] [2022-11-02 21:05:10,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135055405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:10,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:10,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:05:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635629415] [2022-11-02 21:05:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:10,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:10,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:10,061 INFO L87 Difference]: Start difference. First operand 524 states and 714 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:11,417 INFO L93 Difference]: Finished difference Result 1271 states and 1794 transitions. [2022-11-02 21:05:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:05:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-02 21:05:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:11,430 INFO L225 Difference]: With dead ends: 1271 [2022-11-02 21:05:11,430 INFO L226 Difference]: Without dead ends: 767 [2022-11-02 21:05:11,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:11,444 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 744 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 1636 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-11-02 21:05:11,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 525. [2022-11-02 21:05:11,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 398 states have (on average 1.3768844221105527) internal successors, (548), 409 states have internal predecessors, (548), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-02 21:05:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 715 transitions. [2022-11-02 21:05:11,526 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 715 transitions. Word has length 47 [2022-11-02 21:05:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:11,527 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 715 transitions. [2022-11-02 21:05:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 715 transitions. [2022-11-02 21:05:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 21:05:11,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:11,535 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:11,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:05:11,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash -478636591, now seen corresponding path program 1 times [2022-11-02 21:05:11,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352638460] [2022-11-02 21:05:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:11,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:11,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:11,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 21:05:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352638460] [2022-11-02 21:05:11,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352638460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:11,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:11,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:05:11,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136725266] [2022-11-02 21:05:11,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:05:11,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:11,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:05:11,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:05:11,756 INFO L87 Difference]: Start difference. First operand 525 states and 715 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:12,231 INFO L93 Difference]: Finished difference Result 1074 states and 1473 transitions. [2022-11-02 21:05:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:05:12,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2022-11-02 21:05:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:12,236 INFO L225 Difference]: With dead ends: 1074 [2022-11-02 21:05:12,236 INFO L226 Difference]: Without dead ends: 569 [2022-11-02 21:05:12,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:12,239 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 509 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:12,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 671 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:05:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-02 21:05:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 525. [2022-11-02 21:05:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 398 states have (on average 1.3743718592964824) internal successors, (547), 409 states have internal predecessors, (547), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-02 21:05:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 714 transitions. [2022-11-02 21:05:12,298 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 714 transitions. Word has length 47 [2022-11-02 21:05:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:12,298 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 714 transitions. [2022-11-02 21:05:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 714 transitions. [2022-11-02 21:05:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 21:05:12,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:12,301 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:12,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:05:12,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash -457513191, now seen corresponding path program 1 times [2022-11-02 21:05:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627910959] [2022-11-02 21:05:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:12,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:12,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:12,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:12,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:12,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627910959] [2022-11-02 21:05:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627910959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:12,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:12,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 21:05:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459712145] [2022-11-02 21:05:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:05:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:05:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 21:05:12,433 INFO L87 Difference]: Start difference. First operand 525 states and 714 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:05:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:13,338 INFO L93 Difference]: Finished difference Result 1054 states and 1484 transitions. [2022-11-02 21:05:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:05:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-02 21:05:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:13,346 INFO L225 Difference]: With dead ends: 1054 [2022-11-02 21:05:13,346 INFO L226 Difference]: Without dead ends: 1025 [2022-11-02 21:05:13,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:13,348 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 592 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:13,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 943 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:05:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-11-02 21:05:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 932. [2022-11-02 21:05:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 719 states have (on average 1.411682892906815) internal successors, (1015), 743 states have internal predecessors, (1015), 143 states have call successors, (143), 69 states have call predecessors, (143), 69 states have return successors, (147), 131 states have call predecessors, (147), 138 states have call successors, (147) [2022-11-02 21:05:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1305 transitions. [2022-11-02 21:05:13,426 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1305 transitions. Word has length 50 [2022-11-02 21:05:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:13,427 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1305 transitions. [2022-11-02 21:05:13,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 21:05:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1305 transitions. [2022-11-02 21:05:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 21:05:13,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:13,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:05:13,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 638272764, now seen corresponding path program 1 times [2022-11-02 21:05:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:13,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892450509] [2022-11-02 21:05:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 21:05:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 21:05:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:13,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:13,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892450509] [2022-11-02 21:05:13,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892450509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:13,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:13,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:05:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395537325] [2022-11-02 21:05:13,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:13,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:05:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:05:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:05:13,590 INFO L87 Difference]: Start difference. First operand 932 states and 1305 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:15,053 INFO L93 Difference]: Finished difference Result 2764 states and 3873 transitions. [2022-11-02 21:05:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:05:15,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-11-02 21:05:15,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:15,063 INFO L225 Difference]: With dead ends: 2764 [2022-11-02 21:05:15,063 INFO L226 Difference]: Without dead ends: 1852 [2022-11-02 21:05:15,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:05:15,069 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 1176 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 1098 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-02 21:05:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1659. [2022-11-02 21:05:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1288 states have (on average 1.4122670807453417) internal successors, (1819), 1328 states have internal predecessors, (1819), 247 states have call successors, (247), 126 states have call predecessors, (247), 123 states have return successors, (246), 228 states have call predecessors, (246), 242 states have call successors, (246) [2022-11-02 21:05:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2312 transitions. [2022-11-02 21:05:15,231 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2312 transitions. Word has length 65 [2022-11-02 21:05:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:15,232 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2312 transitions. [2022-11-02 21:05:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2312 transitions. [2022-11-02 21:05:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 21:05:15,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:15,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-02 21:05:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:05:15,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:15,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010362, now seen corresponding path program 1 times [2022-11-02 21:05:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151259365] [2022-11-02 21:05:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-02 21:05:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-02 21:05:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 21:05:15,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151259365] [2022-11-02 21:05:15,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151259365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:15,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:15,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:05:15,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440681329] [2022-11-02 21:05:15,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:15,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:05:15,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:15,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:05:15,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:15,480 INFO L87 Difference]: Start difference. First operand 1659 states and 2312 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:16,589 INFO L93 Difference]: Finished difference Result 3474 states and 4860 transitions. [2022-11-02 21:05:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:05:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-11-02 21:05:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:16,598 INFO L225 Difference]: With dead ends: 3474 [2022-11-02 21:05:16,598 INFO L226 Difference]: Without dead ends: 1803 [2022-11-02 21:05:16,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:05:16,602 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 370 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:16,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1331 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:05:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-11-02 21:05:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1639. [2022-11-02 21:05:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1272 states have (on average 1.404874213836478) internal successors, (1787), 1312 states have internal predecessors, (1787), 243 states have call successors, (243), 126 states have call predecessors, (243), 123 states have return successors, (242), 224 states have call predecessors, (242), 238 states have call successors, (242) [2022-11-02 21:05:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2272 transitions. [2022-11-02 21:05:16,729 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2272 transitions. Word has length 73 [2022-11-02 21:05:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:16,729 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2272 transitions. [2022-11-02 21:05:16,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2272 transitions. [2022-11-02 21:05:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 21:05:16,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:16,732 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 21:05:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:05:16,732 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1924223221, now seen corresponding path program 1 times [2022-11-02 21:05:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:16,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872097809] [2022-11-02 21:05:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 21:05:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 21:05:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:16,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872097809] [2022-11-02 21:05:16,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872097809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:16,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:16,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:05:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752117334] [2022-11-02 21:05:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:16,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:16,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:16,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:16,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:16,873 INFO L87 Difference]: Start difference. First operand 1639 states and 2272 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:18,225 INFO L93 Difference]: Finished difference Result 4908 states and 6816 transitions. [2022-11-02 21:05:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:05:18,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2022-11-02 21:05:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:18,242 INFO L225 Difference]: With dead ends: 4908 [2022-11-02 21:05:18,242 INFO L226 Difference]: Without dead ends: 3289 [2022-11-02 21:05:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:05:18,247 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 772 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:18,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 1212 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 21:05:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2022-11-02 21:05:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2936. [2022-11-02 21:05:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2278 states have (on average 1.3999122036874452) internal successors, (3189), 2354 states have internal predecessors, (3189), 428 states have call successors, (428), 230 states have call predecessors, (428), 229 states have return successors, (431), 395 states have call predecessors, (431), 423 states have call successors, (431) [2022-11-02 21:05:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4048 transitions. [2022-11-02 21:05:18,463 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4048 transitions. Word has length 71 [2022-11-02 21:05:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:18,464 INFO L495 AbstractCegarLoop]: Abstraction has 2936 states and 4048 transitions. [2022-11-02 21:05:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4048 transitions. [2022-11-02 21:05:18,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-02 21:05:18,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:18,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:18,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:05:18,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1077933097, now seen corresponding path program 1 times [2022-11-02 21:05:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47450450] [2022-11-02 21:05:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:18,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 21:05:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-02 21:05:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-02 21:05:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:18,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47450450] [2022-11-02 21:05:18,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47450450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:18,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:18,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:05:18,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293337122] [2022-11-02 21:05:18,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:18,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:18,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:05:18,738 INFO L87 Difference]: Start difference. First operand 2936 states and 4048 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:20,555 INFO L93 Difference]: Finished difference Result 7847 states and 10900 transitions. [2022-11-02 21:05:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:05:20,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2022-11-02 21:05:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:20,585 INFO L225 Difference]: With dead ends: 7847 [2022-11-02 21:05:20,585 INFO L226 Difference]: Without dead ends: 4931 [2022-11-02 21:05:20,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:05:20,597 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 1150 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 682 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1184 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 682 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:20,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1184 Valid, 1523 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [682 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2022-11-02 21:05:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4414. [2022-11-02 21:05:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4414 states, 3444 states have (on average 1.3945993031358885) internal successors, (4803), 3560 states have internal predecessors, (4803), 627 states have call successors, (627), 341 states have call predecessors, (627), 342 states have return successors, (634), 580 states have call predecessors, (634), 622 states have call successors, (634) [2022-11-02 21:05:20,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4414 states to 4414 states and 6064 transitions. [2022-11-02 21:05:20,990 INFO L78 Accepts]: Start accepts. Automaton has 4414 states and 6064 transitions. Word has length 117 [2022-11-02 21:05:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:20,992 INFO L495 AbstractCegarLoop]: Abstraction has 4414 states and 6064 transitions. [2022-11-02 21:05:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4414 states and 6064 transitions. [2022-11-02 21:05:20,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-02 21:05:20,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:20,998 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:20,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 21:05:20,998 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1717722878, now seen corresponding path program 1 times [2022-11-02 21:05:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:20,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913432712] [2022-11-02 21:05:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:20,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 21:05:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-02 21:05:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 21:05:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913432712] [2022-11-02 21:05:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913432712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:21,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:21,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:05:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379499209] [2022-11-02 21:05:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:05:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:05:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:21,230 INFO L87 Difference]: Start difference. First operand 4414 states and 6064 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:23,125 INFO L93 Difference]: Finished difference Result 11777 states and 16307 transitions. [2022-11-02 21:05:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:05:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2022-11-02 21:05:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:23,161 INFO L225 Difference]: With dead ends: 11777 [2022-11-02 21:05:23,161 INFO L226 Difference]: Without dead ends: 7383 [2022-11-02 21:05:23,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:05:23,176 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 788 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:23,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1866 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2022-11-02 21:05:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 6624. [2022-11-02 21:05:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 5195 states have (on average 1.3897978825794033) internal successors, (7220), 5371 states have internal predecessors, (7220), 918 states have call successors, (918), 506 states have call predecessors, (918), 510 states have return successors, (931), 850 states have call predecessors, (931), 913 states have call successors, (931) [2022-11-02 21:05:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 9069 transitions. [2022-11-02 21:05:23,893 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 9069 transitions. Word has length 123 [2022-11-02 21:05:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 6624 states and 9069 transitions. [2022-11-02 21:05:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 9069 transitions. [2022-11-02 21:05:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-02 21:05:23,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:23,904 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:23,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:05:23,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 723546157, now seen corresponding path program 1 times [2022-11-02 21:05:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:23,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040832446] [2022-11-02 21:05:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-02 21:05:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 21:05:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-02 21:05:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:05:24,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:24,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040832446] [2022-11-02 21:05:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040832446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:24,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916505698] [2022-11-02 21:05:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:24,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:24,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:24,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:24,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:05:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:05:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:05:24,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:24,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916505698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:24,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:24,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-02 21:05:24,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200478110] [2022-11-02 21:05:24,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:24,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:24,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:24,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:05:24,692 INFO L87 Difference]: Start difference. First operand 6624 states and 9069 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:25,299 INFO L93 Difference]: Finished difference Result 13336 states and 18277 transitions. [2022-11-02 21:05:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:05:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 127 [2022-11-02 21:05:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:25,341 INFO L225 Difference]: With dead ends: 13336 [2022-11-02 21:05:25,342 INFO L226 Difference]: Without dead ends: 6606 [2022-11-02 21:05:25,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:25,360 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 6 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:25,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1767 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6606 states. [2022-11-02 21:05:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6606 to 6606. [2022-11-02 21:05:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6606 states, 5159 states have (on average 1.3855398333010274) internal successors, (7148), 5344 states have internal predecessors, (7148), 936 states have call successors, (936), 506 states have call predecessors, (936), 510 states have return successors, (940), 859 states have call predecessors, (940), 922 states have call successors, (940) [2022-11-02 21:05:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6606 states to 6606 states and 9024 transitions. [2022-11-02 21:05:26,008 INFO L78 Accepts]: Start accepts. Automaton has 6606 states and 9024 transitions. Word has length 127 [2022-11-02 21:05:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:26,009 INFO L495 AbstractCegarLoop]: Abstraction has 6606 states and 9024 transitions. [2022-11-02 21:05:26,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6606 states and 9024 transitions. [2022-11-02 21:05:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-02 21:05:26,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:26,019 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:26,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:26,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:05:26,239 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1165331384, now seen corresponding path program 1 times [2022-11-02 21:05:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450451228] [2022-11-02 21:05:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:26,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-02 21:05:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 21:05:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-02 21:05:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-02 21:05:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 21:05:26,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:26,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450451228] [2022-11-02 21:05:26,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450451228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:26,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:26,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:05:26,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163834377] [2022-11-02 21:05:26,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:05:26,601 INFO L87 Difference]: Start difference. First operand 6606 states and 9024 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:28,183 INFO L93 Difference]: Finished difference Result 13880 states and 19040 transitions. [2022-11-02 21:05:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:05:28,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 129 [2022-11-02 21:05:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:28,217 INFO L225 Difference]: With dead ends: 13880 [2022-11-02 21:05:28,217 INFO L226 Difference]: Without dead ends: 7294 [2022-11-02 21:05:28,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:05:28,233 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 721 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:28,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1209 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 21:05:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2022-11-02 21:05:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 6570. [2022-11-02 21:05:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 5123 states have (on average 1.3812219402693735) internal successors, (7076), 5308 states have internal predecessors, (7076), 936 states have call successors, (936), 506 states have call predecessors, (936), 510 states have return successors, (940), 859 states have call predecessors, (940), 922 states have call successors, (940) [2022-11-02 21:05:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 8952 transitions. [2022-11-02 21:05:28,827 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 8952 transitions. Word has length 129 [2022-11-02 21:05:28,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:28,827 INFO L495 AbstractCegarLoop]: Abstraction has 6570 states and 8952 transitions. [2022-11-02 21:05:28,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 8952 transitions. [2022-11-02 21:05:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-02 21:05:28,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:28,835 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:28,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:05:28,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash -985966780, now seen corresponding path program 1 times [2022-11-02 21:05:28,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536924729] [2022-11-02 21:05:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 21:05:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-02 21:05:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-02 21:05:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:05:29,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536924729] [2022-11-02 21:05:29,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536924729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:29,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516403314] [2022-11-02 21:05:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:29,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:29,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:29,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:05:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:05:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:05:29,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:29,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516403314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:29,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:29,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2022-11-02 21:05:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203610379] [2022-11-02 21:05:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:05:29,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:05:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:05:29,613 INFO L87 Difference]: Start difference. First operand 6570 states and 8952 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 21:05:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:30,923 INFO L93 Difference]: Finished difference Result 19649 states and 26785 transitions. [2022-11-02 21:05:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:05:30,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 130 [2022-11-02 21:05:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:31,005 INFO L225 Difference]: With dead ends: 19649 [2022-11-02 21:05:31,005 INFO L226 Difference]: Without dead ends: 19622 [2022-11-02 21:05:31,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:05:31,013 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 774 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:31,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1682 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:05:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2022-11-02 21:05:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 19472. [2022-11-02 21:05:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19472 states, 15165 states have (on average 1.3853610286844709) internal successors, (21009), 15720 states have internal predecessors, (21009), 2784 states have call successors, (2784), 1500 states have call predecessors, (2784), 1522 states have return successors, (2806), 2563 states have call predecessors, (2806), 2752 states have call successors, (2806) [2022-11-02 21:05:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19472 states to 19472 states and 26599 transitions. [2022-11-02 21:05:33,161 INFO L78 Accepts]: Start accepts. Automaton has 19472 states and 26599 transitions. Word has length 130 [2022-11-02 21:05:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:33,161 INFO L495 AbstractCegarLoop]: Abstraction has 19472 states and 26599 transitions. [2022-11-02 21:05:33,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 21:05:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 19472 states and 26599 transitions. [2022-11-02 21:05:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-02 21:05:33,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:33,184 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:33,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2826583-94ce-46e8-916b-80afc549df44/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:05:33,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1089963992, now seen corresponding path program 1 times [2022-11-02 21:05:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494516268] [2022-11-02 21:05:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 21:05:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-02 21:05:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-02 21:05:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-02 21:05:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494516268] [2022-11-02 21:05:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494516268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:33,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:05:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799997162] [2022-11-02 21:05:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:05:33,678 INFO L87 Difference]: Start difference. First operand 19472 states and 26599 transitions. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:35,177 INFO L93 Difference]: Finished difference Result 26068 states and 35801 transitions. [2022-11-02 21:05:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:05:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 135 [2022-11-02 21:05:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:35,202 INFO L225 Difference]: With dead ends: 26068 [2022-11-02 21:05:35,203 INFO L226 Difference]: Without dead ends: 6429 [2022-11-02 21:05:35,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:35,248 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 867 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:35,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 1129 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 21:05:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6429 states. [2022-11-02 21:05:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6429 to 6299. [2022-11-02 21:05:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 5043 states have (on average 1.403926234384295) internal successors, (7080), 5166 states have internal predecessors, (7080), 795 states have call successors, (795), 465 states have call predecessors, (795), 460 states have return successors, (790), 775 states have call predecessors, (790), 790 states have call successors, (790) [2022-11-02 21:05:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 8665 transitions. [2022-11-02 21:05:35,804 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 8665 transitions. Word has length 135 [2022-11-02 21:05:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:35,805 INFO L495 AbstractCegarLoop]: Abstraction has 6299 states and 8665 transitions. [2022-11-02 21:05:35,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (15), 7 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-02 21:05:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 8665 transitions. [2022-11-02 21:05:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-02 21:05:35,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:35,820 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:35,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 21:05:35,820 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 862404707, now seen corresponding path program 1 times [2022-11-02 21:05:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021039722] [2022-11-02 21:05:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-02 21:05:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-02 21:05:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-02 21:05:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-11-02 21:05:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:05:36,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:36,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021039722] [2022-11-02 21:05:36,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021039722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:36,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:05:36,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378802560] [2022-11-02 21:05:36,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:36,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:36,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:05:36,203 INFO L87 Difference]: Start difference. First operand 6299 states and 8665 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:38,227 INFO L93 Difference]: Finished difference Result 16405 states and 23360 transitions. [2022-11-02 21:05:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:05:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 139 [2022-11-02 21:05:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:38,271 INFO L225 Difference]: With dead ends: 16405 [2022-11-02 21:05:38,272 INFO L226 Difference]: Without dead ends: 10126 [2022-11-02 21:05:38,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:05:38,287 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 671 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:38,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1661 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 21:05:38,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10126 states. [2022-11-02 21:05:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10126 to 6302. [2022-11-02 21:05:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 5046 states have (on average 1.4036860879904876) internal successors, (7083), 5169 states have internal predecessors, (7083), 795 states have call successors, (795), 465 states have call predecessors, (795), 460 states have return successors, (790), 775 states have call predecessors, (790), 790 states have call successors, (790) [2022-11-02 21:05:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 8668 transitions. [2022-11-02 21:05:39,009 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 8668 transitions. Word has length 139 [2022-11-02 21:05:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 6302 states and 8668 transitions. [2022-11-02 21:05:39,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (17), 7 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 8668 transitions. [2022-11-02 21:05:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-02 21:05:39,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:39,031 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:39,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 21:05:39,032 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -460523326, now seen corresponding path program 1 times [2022-11-02 21:05:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581816201] [2022-11-02 21:05:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:39,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 21:05:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 21:05:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:05:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 21:05:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 21:05:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 21:05:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-02 21:05:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-02 21:05:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-02 21:05:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 21:05:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-02 21:05:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-02 21:05:39,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:39,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581816201] [2022-11-02 21:05:39,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581816201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:39,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:39,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 21:05:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567919712] [2022-11-02 21:05:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:05:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:05:39,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:05:39,809 INFO L87 Difference]: Start difference. First operand 6302 states and 8668 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:40,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:40,912 INFO L93 Difference]: Finished difference Result 6983 states and 9558 transitions. [2022-11-02 21:05:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:05:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 141 [2022-11-02 21:05:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:40,913 INFO L225 Difference]: With dead ends: 6983 [2022-11-02 21:05:40,914 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 21:05:40,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:05:40,924 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 706 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:40,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 634 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 21:05:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 21:05:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 21:05:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 21:05:40,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 141 [2022-11-02 21:05:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:40,928 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 21:05:40,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (17), 7 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 21:05:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 21:05:40,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 21:05:40,931 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 21:05:40,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 21:05:40,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-02 21:09:11,120 WARN L234 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 82 DAG size of output: 77 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)