./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/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_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/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 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- 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 20:39:29,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:39:29,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:39:29,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:39:29,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:39:29,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:39:29,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:39:29,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:39:29,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:39:29,308 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:39:29,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:39:29,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:39:29,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:39:29,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:39:29,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:39:29,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:39:29,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:39:29,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:39:29,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:39:29,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:39:29,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:39:29,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:39:29,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:39:29,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:39:29,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:39:29,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:39:29,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:39:29,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:39:29,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:39:29,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:39:29,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:39:29,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:39:29,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:39:29,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:39:29,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:39:29,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:39:29,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:39:29,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:39:29,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:39:29,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:39:29,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:39:29,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:39:29,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:39:29,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:39:29,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:39:29,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:39:29,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:39:29,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:39:29,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:39:29,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:39:29,429 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:39:29,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:39:29,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:39:29,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:39:29,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:39:29,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:39:29,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:39:29,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:39:29,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:39:29,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:39:29,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:39:29,433 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:39:29,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:39:29,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:39:29,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:39:29,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:39:29,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:29,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:39:29,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:39:29,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:39:29,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:39:29,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:39:29,436 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:39:29,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:39:29,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:39:29,437 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_29e532be-aa0c-4229-a921-a873109a50bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-11-02 20:39:29,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:39:29,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:39:29,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:39:29,852 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:39:29,853 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:39:29,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-02 20:39:29,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/data/198372b1d/8cbc70f8f8444b028c8c97bd0ed1818a/FLAG2423d9594 [2022-11-02 20:39:30,960 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:39:30,960 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-11-02 20:39:31,015 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/data/198372b1d/8cbc70f8f8444b028c8c97bd0ed1818a/FLAG2423d9594 [2022-11-02 20:39:31,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/data/198372b1d/8cbc70f8f8444b028c8c97bd0ed1818a [2022-11-02 20:39:31,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:39:31,414 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:39:31,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:31,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:39:31,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:39:31,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:31" (1/1) ... [2022-11-02 20:39:31,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8995e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:31, skipping insertion in model container [2022-11-02 20:39:31,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:39:31" (1/1) ... [2022-11-02 20:39:31,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:39:31,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:39:32,498 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_29e532be-aa0c-4229-a921-a873109a50bf/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-02 20:39:33,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:33,210 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:39:33,339 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_29e532be-aa0c-4229-a921-a873109a50bf/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-11-02 20:39:33,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:39:33,873 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:39:33,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33 WrapperNode [2022-11-02 20:39:33,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:39:33,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:33,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:39:33,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:39:33,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,136 INFO L138 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2022-11-02 20:39:34,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:39:34,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:39:34,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:39:34,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:39:34,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,348 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:39:34,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:39:34,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:39:34,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:39:34,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (1/1) ... [2022-11-02 20:39:34,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:39:34,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:39:34,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:39:34,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29e532be-aa0c-4229-a921-a873109a50bf/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:39:34,491 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-11-02 20:39:34,492 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-11-02 20:39:34,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-02 20:39:34,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-02 20:39:34,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-02 20:39:34,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:39:34,493 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-11-02 20:39:34,493 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-11-02 20:39:34,493 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-11-02 20:39:34,493 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-11-02 20:39:34,493 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-11-02 20:39:34,493 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-11-02 20:39:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:39:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-11-02 20:39:34,494 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-11-02 20:39:34,494 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-11-02 20:39:34,494 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-11-02 20:39:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-11-02 20:39:34,495 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-11-02 20:39:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-02 20:39:34,495 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-02 20:39:34,495 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-11-02 20:39:34,496 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-11-02 20:39:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-11-02 20:39:34,496 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-11-02 20:39:34,496 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-11-02 20:39:34,496 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-11-02 20:39:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:39:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:39:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-11-02 20:39:34,497 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-11-02 20:39:34,497 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-11-02 20:39:34,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-11-02 20:39:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:39:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:39:34,498 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-11-02 20:39:34,499 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-11-02 20:39:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:39:34,499 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-11-02 20:39:34,499 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-11-02 20:39:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:39:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-11-02 20:39:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-11-02 20:39:34,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-11-02 20:39:34,500 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-11-02 20:39:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:39:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-11-02 20:39:34,501 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-11-02 20:39:34,501 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-11-02 20:39:34,502 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-11-02 20:39:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-02 20:39:34,502 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-11-02 20:39:34,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-11-02 20:39:34,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:39:34,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:39:35,064 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:39:35,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:39:35,121 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,146 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-02 20:39:35,147 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-02 20:39:35,152 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,353 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-02 20:39:35,353 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-02 20:39:35,378 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,424 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-11-02 20:39:35,425 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-11-02 20:39:35,538 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,568 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-11-02 20:39:35,568 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-11-02 20:39:35,569 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,570 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,571 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,725 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-11-02 20:39:35,726 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-11-02 20:39:35,726 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-11-02 20:39:35,726 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-11-02 20:39:35,726 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-11-02 20:39:35,727 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-11-02 20:39:35,729 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,739 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:35,744 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,651 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-11-02 20:39:36,652 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-11-02 20:39:36,652 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-11-02 20:39:36,652 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-11-02 20:39:36,652 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-11-02 20:39:36,653 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-11-02 20:39:36,694 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,751 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-11-02 20:39:36,752 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-11-02 20:39:36,768 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,773 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,776 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,781 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,783 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,788 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,790 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:36,793 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-11-02 20:39:40,951 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-11-02 20:39:40,952 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-11-02 20:39:40,953 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-11-02 20:39:40,953 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-11-02 20:39:40,986 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:39:41,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:39:41,015 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:39:41,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:41 BoogieIcfgContainer [2022-11-02 20:39:41,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:39:41,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:39:41,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:39:41,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:39:41,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:39:31" (1/3) ... [2022-11-02 20:39:41,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7504c7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:41, skipping insertion in model container [2022-11-02 20:39:41,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:39:33" (2/3) ... [2022-11-02 20:39:41,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7504c7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:39:41, skipping insertion in model container [2022-11-02 20:39:41,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:39:41" (3/3) ... [2022-11-02 20:39:41,033 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-11-02 20:39:41,055 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:39:41,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:39:41,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:39:41,134 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;@380dd408, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:39:41,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:39:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-02 20:39:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:39:41,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:41,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:41,152 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2022-11-02 20:39:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:41,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060548972] [2022-11-02 20:39:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:41,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:42,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060548972] [2022-11-02 20:39:42,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060548972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:42,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:42,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922905970] [2022-11-02 20:39:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:42,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:42,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:42,304 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:39:47,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:39:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:48,012 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2022-11-02 20:39:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:39:48,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-02 20:39:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:48,058 INFO L225 Difference]: With dead ends: 1174 [2022-11-02 20:39:48,062 INFO L226 Difference]: Without dead ends: 657 [2022-11-02 20:39:48,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 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 20:39:48,083 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:48,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2156 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 785 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-11-02 20:39:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-02 20:39:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-11-02 20:39:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-02 20:39:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2022-11-02 20:39:48,261 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2022-11-02 20:39:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:48,261 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2022-11-02 20:39:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:39:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2022-11-02 20:39:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:39:48,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:48,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:39:48,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2022-11-02 20:39:48,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:48,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952163787] [2022-11-02 20:39:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:48,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:48,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:48,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952163787] [2022-11-02 20:39:48,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952163787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:48,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:48,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:39:48,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835349020] [2022-11-02 20:39:48,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:48,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:39:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:39:48,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:39:48,974 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:39:54,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:39:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:54,808 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2022-11-02 20:39:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:39:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-02 20:39:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:54,816 INFO L225 Difference]: With dead ends: 1217 [2022-11-02 20:39:54,816 INFO L226 Difference]: Without dead ends: 657 [2022-11-02 20:39:54,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:39:54,828 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:54,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 2765 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 986 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-02 20:39:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-02 20:39:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2022-11-02 20:39:54,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-02 20:39:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2022-11-02 20:39:54,910 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2022-11-02 20:39:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:54,910 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2022-11-02 20:39:54,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:39:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2022-11-02 20:39:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:39:54,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:54,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:54,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:39:54,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:54,918 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2022-11-02 20:39:54,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:39:54,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800460856] [2022-11-02 20:39:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:39:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:39:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:39:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:39:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:39:55,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:39:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800460856] [2022-11-02 20:39:55,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800460856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:39:55,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:39:55,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:39:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966082040] [2022-11-02 20:39:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:39:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:39:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:39:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:39:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:39:55,689 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:00,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:02,120 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2022-11-02 20:40:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:40:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-02 20:40:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:02,130 INFO L225 Difference]: With dead ends: 1542 [2022-11-02 20:40:02,130 INFO L226 Difference]: Without dead ends: 1127 [2022-11-02 20:40:02,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:40:02,134 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 1330 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:02,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 2428 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1032 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-02 20:40:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-02 20:40:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2022-11-02 20:40:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2022-11-02 20:40:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2022-11-02 20:40:02,202 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2022-11-02 20:40:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:02,203 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2022-11-02 20:40:02,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2022-11-02 20:40:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:40:02,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:02,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:40:02,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2022-11-02 20:40:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731381217] [2022-11-02 20:40:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:02,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:02,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:40:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:02,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:02,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731381217] [2022-11-02 20:40:02,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731381217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:02,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:02,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:40:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975057796] [2022-11-02 20:40:02,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:02,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:02,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:02,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:02,917 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:40:07,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:09,403 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2022-11-02 20:40:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:40:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-02 20:40:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:09,417 INFO L225 Difference]: With dead ends: 1879 [2022-11-02 20:40:09,417 INFO L226 Difference]: Without dead ends: 1860 [2022-11-02 20:40:09,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 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 20:40:09,421 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:09,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1530 Valid, 2050 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 823 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-02 20:40:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-02 20:40:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2022-11-02 20:40:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2022-11-02 20:40:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2022-11-02 20:40:09,552 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2022-11-02 20:40:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:09,553 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2022-11-02 20:40:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:40:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2022-11-02 20:40:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:40:09,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:09,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:09,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:40:09,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2022-11-02 20:40:09,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133392567] [2022-11-02 20:40:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:09,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:09,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:09,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133392567] [2022-11-02 20:40:09,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133392567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:09,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:09,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:40:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397106277] [2022-11-02 20:40:09,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:09,974 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:15,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:15,826 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2022-11-02 20:40:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:40:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-11-02 20:40:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:15,839 INFO L225 Difference]: With dead ends: 1856 [2022-11-02 20:40:15,839 INFO L226 Difference]: Without dead ends: 1852 [2022-11-02 20:40:15,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 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 20:40:15,842 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:15,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2039 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-02 20:40:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-02 20:40:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2022-11-02 20:40:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2022-11-02 20:40:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2022-11-02 20:40:15,941 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2022-11-02 20:40:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:15,943 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2022-11-02 20:40:15,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2022-11-02 20:40:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:40:15,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:15,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:15,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:40:15,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:15,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:15,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2022-11-02 20:40:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:15,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975334428] [2022-11-02 20:40:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:16,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975334428] [2022-11-02 20:40:16,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975334428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:16,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:16,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:40:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064235272] [2022-11-02 20:40:16,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:16,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:40:16,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:40:16,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:40:16,288 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:21,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:23,960 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2022-11-02 20:40:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:40:23,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-02 20:40:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:23,992 INFO L225 Difference]: With dead ends: 3293 [2022-11-02 20:40:23,992 INFO L226 Difference]: Without dead ends: 3290 [2022-11-02 20:40:23,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:40:23,997 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:23,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 2956 Invalid, 1497 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [310 Valid, 1186 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2022-11-02 20:40:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2022-11-02 20:40:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2022-11-02 20:40:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2022-11-02 20:40:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2022-11-02 20:40:24,216 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2022-11-02 20:40:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:24,217 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2022-11-02 20:40:24,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:40:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2022-11-02 20:40:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:40:24,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:24,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:24,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:40:24,219 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:24,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2022-11-02 20:40:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887149932] [2022-11-02 20:40:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:24,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:24,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:40:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:24,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:40:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887149932] [2022-11-02 20:40:24,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887149932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:24,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:24,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:40:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808286154] [2022-11-02 20:40:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:40:24,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:40:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:40:24,628 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:40:30,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:33,424 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2022-11-02 20:40:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:40:33,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-11-02 20:40:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:33,450 INFO L225 Difference]: With dead ends: 3942 [2022-11-02 20:40:33,450 INFO L226 Difference]: Without dead ends: 3937 [2022-11-02 20:40:33,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:40:33,455 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:33,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 2907 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1635 Invalid, 1 Unknown, 0 Unchecked, 8.2s Time] [2022-11-02 20:40:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2022-11-02 20:40:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2022-11-02 20:40:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-11-02 20:40:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2022-11-02 20:40:33,781 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2022-11-02 20:40:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:33,781 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2022-11-02 20:40:33,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:40:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2022-11-02 20:40:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:40:33,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:33,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:33,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:40:33,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:33,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2022-11-02 20:40:33,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:33,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114117016] [2022-11-02 20:40:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:33,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:34,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:34,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114117016] [2022-11-02 20:40:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114117016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:34,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:34,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:40:34,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201962385] [2022-11-02 20:40:34,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:40:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:40:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:40:34,372 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:40:39,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:41,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:43,206 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2022-11-02 20:40:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:40:43,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-02 20:40:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:43,230 INFO L225 Difference]: With dead ends: 7046 [2022-11-02 20:40:43,230 INFO L226 Difference]: Without dead ends: 4021 [2022-11-02 20:40:43,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:40:43,244 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 769 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:43,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 2279 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1165 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-02 20:40:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-11-02 20:40:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2022-11-02 20:40:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2022-11-02 20:40:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2022-11-02 20:40:43,540 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2022-11-02 20:40:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:43,541 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2022-11-02 20:40:43,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:40:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2022-11-02 20:40:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:40:43,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:43,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:40:43,543 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2022-11-02 20:40:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198281389] [2022-11-02 20:40:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:43,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:40:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:43,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198281389] [2022-11-02 20:40:43,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198281389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:43,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:43,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:40:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633158407] [2022-11-02 20:40:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:43,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:40:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:40:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:40:43,938 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:40:48,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:40:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:51,372 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2022-11-02 20:40:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:40:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-11-02 20:40:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:51,422 INFO L225 Difference]: With dead ends: 10834 [2022-11-02 20:40:51,422 INFO L226 Difference]: Without dead ends: 7785 [2022-11-02 20:40:51,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:40:51,443 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:51,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 2722 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1228 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-02 20:40:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2022-11-02 20:40:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2022-11-02 20:40:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-02 20:40:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2022-11-02 20:40:52,098 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2022-11-02 20:40:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:52,099 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2022-11-02 20:40:52,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:40:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2022-11-02 20:40:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:40:52,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:52,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:52,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:40:52,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2022-11-02 20:40:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545753356] [2022-11-02 20:40:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:40:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:40:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:40:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:40:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:52,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545753356] [2022-11-02 20:40:52,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545753356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:52,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:52,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:40:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108477207] [2022-11-02 20:40:52,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:52,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:40:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:40:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:40:52,767 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:40:58,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:02,599 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2022-11-02 20:41:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:41:02,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-11-02 20:41:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:02,657 INFO L225 Difference]: With dead ends: 7819 [2022-11-02 20:41:02,658 INFO L226 Difference]: Without dead ends: 7813 [2022-11-02 20:41:02,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:41:02,663 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2724 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 1105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 3201 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:02,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2787 Valid, 3201 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2060 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-11-02 20:41:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2022-11-02 20:41:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2022-11-02 20:41:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-02 20:41:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2022-11-02 20:41:03,312 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2022-11-02 20:41:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:03,312 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2022-11-02 20:41:03,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:41:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2022-11-02 20:41:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:41:03,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:03,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:41:03,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1807638448, now seen corresponding path program 1 times [2022-11-02 20:41:03,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:03,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266087830] [2022-11-02 20:41:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:03,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:03,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:03,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:41:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:41:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:03,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266087830] [2022-11-02 20:41:03,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266087830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:03,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:03,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:41:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158058655] [2022-11-02 20:41:03,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:41:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:41:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:41:03,922 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:41:10,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:12,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:16,628 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2022-11-02 20:41:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:41:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-02 20:41:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:16,664 INFO L225 Difference]: With dead ends: 7815 [2022-11-02 20:41:16,664 INFO L226 Difference]: Without dead ends: 7809 [2022-11-02 20:41:16,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:41:16,669 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 2321 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 849 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 3443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:16,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2383 Valid, 3546 Invalid, 3443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2592 Invalid, 2 Unknown, 0 Unchecked, 11.4s Time] [2022-11-02 20:41:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2022-11-02 20:41:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2022-11-02 20:41:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2022-11-02 20:41:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2022-11-02 20:41:17,365 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 50 [2022-11-02 20:41:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:17,365 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2022-11-02 20:41:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:41:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2022-11-02 20:41:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:41:17,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:17,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:17,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:41:17,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2022-11-02 20:41:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104968648] [2022-11-02 20:41:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:17,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:17,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:41:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:41:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:18,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104968648] [2022-11-02 20:41:18,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104968648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:18,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:18,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:41:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399001596] [2022-11-02 20:41:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:18,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:41:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:41:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:41:18,110 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:41:25,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:27,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:29,614 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2022-11-02 20:41:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:41:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-02 20:41:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:29,658 INFO L225 Difference]: With dead ends: 7824 [2022-11-02 20:41:29,658 INFO L226 Difference]: Without dead ends: 7807 [2022-11-02 20:41:29,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:41:29,669 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 683 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:29,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 3518 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2135 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2022-11-02 20:41:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2022-11-02 20:41:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2022-11-02 20:41:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2022-11-02 20:41:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2022-11-02 20:41:30,381 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2022-11-02 20:41:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:30,382 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2022-11-02 20:41:30,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:41:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2022-11-02 20:41:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:41:30,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:30,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:41:30,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:30,387 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2022-11-02 20:41:30,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:30,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617702144] [2022-11-02 20:41:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:30,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:30,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:41:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-02 20:41:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:31,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617702144] [2022-11-02 20:41:31,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617702144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:31,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:31,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:41:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256878088] [2022-11-02 20:41:31,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:41:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:41:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:41:31,018 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:41:37,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:39,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:41,324 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2022-11-02 20:41:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:41:41,325 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-11-02 20:41:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:41,363 INFO L225 Difference]: With dead ends: 7822 [2022-11-02 20:41:41,363 INFO L226 Difference]: Without dead ends: 7800 [2022-11-02 20:41:41,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:41:41,371 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 682 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:41,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 3518 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2129 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-11-02 20:41:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2022-11-02 20:41:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2022-11-02 20:41:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-11-02 20:41:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2022-11-02 20:41:41,957 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2022-11-02 20:41:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:41,957 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2022-11-02 20:41:41,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:41:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2022-11-02 20:41:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:41:41,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:41,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:41,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:41:41,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:41,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2022-11-02 20:41:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:41,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490760949] [2022-11-02 20:41:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:41,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:42,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:42,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:41:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490760949] [2022-11-02 20:41:42,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490760949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:42,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:42,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:41:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822359432] [2022-11-02 20:41:42,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:42,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:41:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:42,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:41:42,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:42,492 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:41:47,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:48,592 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2022-11-02 20:41:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:41:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-11-02 20:41:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:48,634 INFO L225 Difference]: With dead ends: 13804 [2022-11-02 20:41:48,634 INFO L226 Difference]: Without dead ends: 8064 [2022-11-02 20:41:48,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:41:48,676 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 411 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:48,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2070 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 921 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-02 20:41:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2022-11-02 20:41:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2022-11-02 20:41:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2022-11-02 20:41:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2022-11-02 20:41:49,313 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2022-11-02 20:41:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:49,314 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2022-11-02 20:41:49,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:41:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2022-11-02 20:41:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:41:49,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:49,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:49,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:41:49,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:49,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2022-11-02 20:41:49,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:49,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594970884] [2022-11-02 20:41:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:49,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-02 20:41:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:49,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:49,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594970884] [2022-11-02 20:41:49,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594970884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:49,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:49,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:41:49,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133210900] [2022-11-02 20:41:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:49,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:41:49,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:41:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:41:49,783 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:41:54,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:41:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:56,505 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2022-11-02 20:41:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:41:56,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-11-02 20:41:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:56,598 INFO L225 Difference]: With dead ends: 8020 [2022-11-02 20:41:56,599 INFO L226 Difference]: Without dead ends: 8002 [2022-11-02 20:41:56,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:41:56,604 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 868 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 374 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:56,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 2803 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1405 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-02 20:41:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2022-11-02 20:41:57,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2022-11-02 20:41:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2022-11-02 20:41:57,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2022-11-02 20:41:57,492 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2022-11-02 20:41:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:57,492 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2022-11-02 20:41:57,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:41:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2022-11-02 20:41:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:41:57,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:57,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:57,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:41:57,495 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2022-11-02 20:41:57,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:57,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725971674] [2022-11-02 20:41:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:57,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:58,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:41:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725971674] [2022-11-02 20:41:58,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725971674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:58,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:41:58,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073256526] [2022-11-02 20:41:58,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:41:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:41:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:58,064 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:02,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:03,830 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2022-11-02 20:42:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:42:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-11-02 20:42:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:03,864 INFO L225 Difference]: With dead ends: 11721 [2022-11-02 20:42:03,864 INFO L226 Difference]: Without dead ends: 7953 [2022-11-02 20:42:03,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:03,888 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1185 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 352 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:03,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1858 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-02 20:42:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2022-11-02 20:42:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2022-11-02 20:42:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2022-11-02 20:42:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2022-11-02 20:42:04,628 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2022-11-02 20:42:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:04,628 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2022-11-02 20:42:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2022-11-02 20:42:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:42:04,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:04,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:04,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:42:04,636 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:04,637 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2022-11-02 20:42:04,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:04,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863791953] [2022-11-02 20:42:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:42:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-02 20:42:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:05,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863791953] [2022-11-02 20:42:05,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863791953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:05,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:05,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:42:05,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87882731] [2022-11-02 20:42:05,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:42:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:42:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:42:05,290 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:42:10,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:13,003 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2022-11-02 20:42:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:42:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2022-11-02 20:42:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:13,037 INFO L225 Difference]: With dead ends: 8024 [2022-11-02 20:42:13,037 INFO L226 Difference]: Without dead ends: 8008 [2022-11-02 20:42:13,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:13,043 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 932 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3306 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:13,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3306 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1743 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-02 20:42:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-11-02 20:42:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2022-11-02 20:42:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2022-11-02 20:42:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2022-11-02 20:42:13,787 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2022-11-02 20:42:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:13,788 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2022-11-02 20:42:13,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 20:42:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2022-11-02 20:42:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:42:13,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:13,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:42:13,791 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:13,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2022-11-02 20:42:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693518472] [2022-11-02 20:42:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:13,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:14,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:14,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693518472] [2022-11-02 20:42:14,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693518472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:14,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:14,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:42:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438142305] [2022-11-02 20:42:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:14,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:42:14,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:14,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:42:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:42:14,108 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:18,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:21,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:24,685 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2022-11-02 20:42:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:42:24,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-11-02 20:42:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:24,729 INFO L225 Difference]: With dead ends: 10992 [2022-11-02 20:42:24,729 INFO L226 Difference]: Without dead ends: 10979 [2022-11-02 20:42:24,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 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 20:42:24,737 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 966 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:24,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 3004 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1184 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-11-02 20:42:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-11-02 20:42:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2022-11-02 20:42:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2022-11-02 20:42:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2022-11-02 20:42:25,698 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2022-11-02 20:42:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:25,699 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2022-11-02 20:42:25,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2022-11-02 20:42:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:42:25,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:25,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:42:25,702 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:25,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2022-11-02 20:42:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:25,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890712914] [2022-11-02 20:42:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:25,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:26,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:26,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:26,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:26,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890712914] [2022-11-02 20:42:26,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890712914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:26,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:26,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458312146] [2022-11-02 20:42:26,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:42:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:42:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:26,155 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:30,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:32,434 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2022-11-02 20:42:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:42:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-11-02 20:42:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:32,466 INFO L225 Difference]: With dead ends: 13163 [2022-11-02 20:42:32,466 INFO L226 Difference]: Without dead ends: 8839 [2022-11-02 20:42:32,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:32,491 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 1171 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 333 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:32,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 1866 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 853 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-02 20:42:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2022-11-02 20:42:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2022-11-02 20:42:33,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2022-11-02 20:42:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2022-11-02 20:42:33,254 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2022-11-02 20:42:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:33,254 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2022-11-02 20:42:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2022-11-02 20:42:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:42:33,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:33,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:42:33,256 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2022-11-02 20:42:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260752968] [2022-11-02 20:42:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:42:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260752968] [2022-11-02 20:42:33,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260752968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:33,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:33,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:42:33,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777506320] [2022-11-02 20:42:33,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:33,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:33,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:33,690 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:38,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:40,517 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2022-11-02 20:42:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:42:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2022-11-02 20:42:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:40,539 INFO L225 Difference]: With dead ends: 7691 [2022-11-02 20:42:40,539 INFO L226 Difference]: Without dead ends: 7673 [2022-11-02 20:42:40,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:42:40,544 INFO L413 NwaCegarLoop]: 716 mSDtfsCounter, 861 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2812 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 2812 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1401 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-02 20:42:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2022-11-02 20:42:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2022-11-02 20:42:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2022-11-02 20:42:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2022-11-02 20:42:41,218 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2022-11-02 20:42:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2022-11-02 20:42:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2022-11-02 20:42:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:42:41,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:41,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:41,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:42:41,221 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:41,221 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2022-11-02 20:42:41,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653656956] [2022-11-02 20:42:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:41,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:41,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653656956] [2022-11-02 20:42:41,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653656956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:41,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:41,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:41,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963479525] [2022-11-02 20:42:41,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:41,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:42:41,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:42:41,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:41,705 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:46,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:49,775 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2022-11-02 20:42:49,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-02 20:42:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:49,797 INFO L225 Difference]: With dead ends: 9126 [2022-11-02 20:42:49,797 INFO L226 Difference]: Without dead ends: 9122 [2022-11-02 20:42:49,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:42:49,800 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 1660 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 535 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 2790 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-02 20:42:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2022-11-02 20:42:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2022-11-02 20:42:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2022-11-02 20:42:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2022-11-02 20:42:50,445 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2022-11-02 20:42:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:50,445 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2022-11-02 20:42:50,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2022-11-02 20:42:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:42:50,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:50,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:50,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:42:50,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:50,448 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2022-11-02 20:42:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:50,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772757880] [2022-11-02 20:42:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:50,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:50,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:50,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:50,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772757880] [2022-11-02 20:42:50,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772757880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:50,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:50,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:42:50,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153611050] [2022-11-02 20:42:50,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:50,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:42:50,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:42:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:42:50,983 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:56,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-02 20:42:58,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:58,542 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2022-11-02 20:42:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:42:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-11-02 20:42:58,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:58,564 INFO L225 Difference]: With dead ends: 7650 [2022-11-02 20:42:58,564 INFO L226 Difference]: Without dead ends: 7607 [2022-11-02 20:42:58,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:42:58,568 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 410 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:58,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 3663 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1440 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-02 20:42:58,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-11-02 20:42:59,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2022-11-02 20:42:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2022-11-02 20:42:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2022-11-02 20:42:59,398 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2022-11-02 20:42:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:59,398 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2022-11-02 20:42:59,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2022-11-02 20:42:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:42:59,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:59,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:59,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:42:59,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2022-11-02 20:42:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:59,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896412055] [2022-11-02 20:42:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:59,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-02 20:42:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 20:42:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:43:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:00,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:00,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896412055] [2022-11-02 20:43:00,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896412055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:00,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:00,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:43:00,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226127758] [2022-11-02 20:43:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:00,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:43:00,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:43:00,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:43:00,067 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4)