./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/parport.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/parport.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8 --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 4ac544dc5b01c2e84192d57540176c08b809d66a678248491533d1421aab9cd9 --- 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-2329fc7 [2022-12-13 20:28:16,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:28:16,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:28:16,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:28:16,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:28:16,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:28:16,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:28:16,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:28:16,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:28:16,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:28:16,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:28:16,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:28:16,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:28:16,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:28:16,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:28:16,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:28:16,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:28:16,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:28:16,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:28:16,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:28:16,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:28:16,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:28:16,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:28:16,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:28:16,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:28:16,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:28:16,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:28:16,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:28:16,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:28:16,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:28:16,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:28:16,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:28:16,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:28:16,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:28:16,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:28:16,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:28:16,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:28:16,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:28:16,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:28:16,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:28:16,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:28:16,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:28:16,666 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:28:16,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:28:16,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:28:16,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:28:16,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:28:16,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:28:16,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:28:16,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:28:16,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:28:16,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:28:16,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:28:16,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:28:16,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:28:16,671 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ac544dc5b01c2e84192d57540176c08b809d66a678248491533d1421aab9cd9 [2022-12-13 20:28:16,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:28:16,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:28:16,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:28:16,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:28:16,857 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:28:16,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/ntdrivers/parport.i.cil-2.c [2022-12-13 20:28:19,450 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:28:19,819 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:28:19,819 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/sv-benchmarks/c/ntdrivers/parport.i.cil-2.c [2022-12-13 20:28:19,842 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/data/595e2e2ba/37d7f3edf82647d892f91f7e65e92b76/FLAG6d9d26aec [2022-12-13 20:28:20,025 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/data/595e2e2ba/37d7f3edf82647d892f91f7e65e92b76 [2022-12-13 20:28:20,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:28:20,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:28:20,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:20,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:28:20,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:28:20,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:20" (1/1) ... [2022-12-13 20:28:20,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d76f3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:20, skipping insertion in model container [2022-12-13 20:28:20,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:28:20" (1/1) ... [2022-12-13 20:28:20,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:28:20,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:28:20,752 WARN L237 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_d6e375df-ee70-4874-ac53-51c4e682cc40/sv-benchmarks/c/ntdrivers/parport.i.cil-2.c[86591,86604] [2022-12-13 20:28:21,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:21,319 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:28:21,356 WARN L237 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_d6e375df-ee70-4874-ac53-51c4e682cc40/sv-benchmarks/c/ntdrivers/parport.i.cil-2.c[86591,86604] [2022-12-13 20:28:21,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:28:21,546 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:28:21,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21 WrapperNode [2022-12-13 20:28:21,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:28:21,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:28:21,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:28:21,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:28:21,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,721 INFO L138 Inliner]: procedures = 248, calls = 2342, calls flagged for inlining = 84, calls inlined = 64, statements flattened = 4671 [2022-12-13 20:28:21,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:28:21,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:28:21,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:28:21,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:28:21,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,904 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:28:21,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:28:21,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:28:21,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:28:21,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (1/1) ... [2022-12-13 20:28:21,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:28:21,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:21,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:28:21,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:28:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure PptDebugDumpResourceRequirementsList [2022-12-13 20:28:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDebugDumpResourceRequirementsList [2022-12-13 20:28:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure PptAcquireRemoveLock [2022-12-13 20:28:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure PptAcquireRemoveLock [2022-12-13 20:28:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure WRITE_PORT_UCHAR [2022-12-13 20:28:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure WRITE_PORT_UCHAR [2022-12-13 20:28:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure PptLegacyZipClockDiskModeByte [2022-12-13 20:28:21,999 INFO L138 BoogieDeclarations]: Found implementation of procedure PptLegacyZipClockDiskModeByte [2022-12-13 20:28:21,999 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~PVOID~0~TO~~BOOLEAN~0 [2022-12-13 20:28:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~PVOID~0~TO~~BOOLEAN~0 [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure PptClearByteMode [2022-12-13 20:28:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure PptClearByteMode [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure KeStallExecutionProcessor [2022-12-13 20:28:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure KeStallExecutionProcessor [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure PptEcrSetMode [2022-12-13 20:28:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure PptEcrSetMode [2022-12-13 20:28:22,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 20:28:22,000 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure PptSynchronizedDecrement [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSynchronizedDecrement [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure PptPnpPassThroughPnpIrpAndReleaseRemoveLock [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPnpPassThroughPnpIrpAndReleaseRemoveLock [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure PptEcrClearMode [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure PptEcrClearMode [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:28:22,001 INFO L130 BoogieDeclarations]: Found specification of procedure PptDumpRemovalRelationsList [2022-12-13 20:28:22,001 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDumpRemovalRelationsList [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure PptLogError [2022-12-13 20:28:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure PptLogError [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure PptPnpUnhandledIrp [2022-12-13 20:28:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPnpUnhandledIrp [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure PptPnpFilterExistsNonIrqResourceList [2022-12-13 20:28:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPnpFilterExistsNonIrqResourceList [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure PptIsNecR98Machine [2022-12-13 20:28:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure PptIsNecR98Machine [2022-12-13 20:28:22,002 INFO L130 BoogieDeclarations]: Found specification of procedure CheckPort [2022-12-13 20:28:22,002 INFO L138 BoogieDeclarations]: Found implementation of procedure CheckPort [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure PptLegacyZipSetDiskMode [2022-12-13 20:28:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure PptLegacyZipSetDiskMode [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure PptTrySelectLegacyZip [2022-12-13 20:28:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure PptTrySelectLegacyZip [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure PptDeselectDevice [2022-12-13 20:28:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDeselectDevice [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-12-13 20:28:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-12-13 20:28:22,003 INFO L130 BoogieDeclarations]: Found specification of procedure PptDisconnectInterrupt [2022-12-13 20:28:22,003 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDisconnectInterrupt [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure RtlQueryRegistryValues [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlQueryRegistryValues [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure PptPnpBounceAndCatchPnpIrp [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPnpBounceAndCatchPnpIrp [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryTickCount [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryTickCount [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryTimeIncrement [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryTimeIncrement [2022-12-13 20:28:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure PptSynchronizedIncrement [2022-12-13 20:28:22,004 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSynchronizedIncrement [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure PptSynchCompletionRoutine [2022-12-13 20:28:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSynchCompletionRoutine [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure IoReportResourceUsage [2022-12-13 20:28:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure IoReportResourceUsage [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure PptInitiate1284_3 [2022-12-13 20:28:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure PptInitiate1284_3 [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure PptPnpFilterRemoveIrqResourceLists [2022-12-13 20:28:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPnpFilterRemoveIrqResourceLists [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure PptDispatchCleanup [2022-12-13 20:28:22,005 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDispatchCleanup [2022-12-13 20:28:22,005 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure RtlCompareUnicodeString [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure RtlCompareUnicodeString [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure READ_PORT_UCHAR [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure READ_PORT_UCHAR [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure PptFreePort [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure PptFreePort [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure PptDetectEcpPort [2022-12-13 20:28:22,006 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDetectEcpPort [2022-12-13 20:28:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure PptDeselectLegacyZip [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDeselectLegacyZip [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure PptSetCancelRoutine [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSetCancelRoutine [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure PptTrySelectDevice [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure PptTrySelectDevice [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:28:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure PptDetectBytePort [2022-12-13 20:28:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDetectBytePort [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure PptReleaseRemoveLock [2022-12-13 20:28:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure PptReleaseRemoveLock [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure PptPowerComplete [2022-12-13 20:28:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure PptPowerComplete [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure PptFailRequest [2022-12-13 20:28:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure PptFailRequest [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure IoAcquireRemoveLockEx [2022-12-13 20:28:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure IoAcquireRemoveLockEx [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 20:28:22,008 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-12-13 20:28:22,008 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptSetByteMode [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSetByteMode [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptLegacyZipClockPrtModeByte [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptLegacyZipClockPrtModeByte [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptDetectEppPort [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDetectEppPort [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptDetermineFifoWidth [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDetermineFifoWidth [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptSend1284_3Command [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptSend1284_3Command [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptDetermineFifoDepth [2022-12-13 20:28:22,009 INFO L138 BoogieDeclarations]: Found implementation of procedure PptDetermineFifoDepth [2022-12-13 20:28:22,009 INFO L130 BoogieDeclarations]: Found specification of procedure PptCompleteRequest [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure PptCompleteRequest [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure PoCallDriver [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure PoCallDriver [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure PoRequestPowerIrp [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure PoRequestPowerIrp [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure KeSynchronizeExecution [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSynchronizeExecution [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure PptAcquireRemoveLockOrFailIrp [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure PptAcquireRemoveLockOrFailIrp [2022-12-13 20:28:22,010 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~PVOID~0~X~~UCHAR~0~TO~~NTSTATUS~0 [2022-12-13 20:28:22,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~PVOID~0~X~~UCHAR~0~TO~~NTSTATUS~0 [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure PoSetPowerState [2022-12-13 20:28:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure PoSetPowerState [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure Ppt1284_3AssignAddress [2022-12-13 20:28:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure Ppt1284_3AssignAddress [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-12-13 20:28:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-12-13 20:28:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-12-13 20:28:22,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:28:22,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:28:22,553 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:28:22,555 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:28:22,589 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:22,627 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !false; [2022-12-13 20:28:22,627 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume false; [2022-12-13 20:28:22,633 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:22,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2022-12-13 20:28:22,690 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2022-12-13 20:28:23,070 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,125 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-12-13 20:28:23,126 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-12-13 20:28:23,452 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,456 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-13 20:28:23,456 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-13 20:28:23,544 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,559 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-12-13 20:28:23,559 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-12-13 20:28:23,649 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,653 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-13 20:28:23,653 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-13 20:28:23,655 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2022-12-13 20:28:23,672 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2022-12-13 20:28:23,672 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,706 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume false; [2022-12-13 20:28:23,706 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##22: assume !false; [2022-12-13 20:28:23,948 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,949 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,950 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,951 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,951 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,953 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,960 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,961 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,965 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,966 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,967 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:23,968 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 20:28:30,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##375: assume !false; [2022-12-13 20:28:30,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##374: assume false; [2022-12-13 20:28:30,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##412: assume false; [2022-12-13 20:28:30,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##413: assume !false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##477: assume !false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##476: assume false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##531: assume !false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##530: assume false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##521: assume !false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##520: assume false; [2022-12-13 20:28:30,538 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##99: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##75: assume !false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##74: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##31: assume !false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##30: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##131: assume !false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##130: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##137: assume !false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##136: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-12-13 20:28:30,539 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##576: assume !false; [2022-12-13 20:28:30,540 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##575: assume false; [2022-12-13 20:28:30,540 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##100: assume !false; [2022-12-13 20:28:30,609 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:28:30,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:28:30,626 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-12-13 20:28:30,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:28:30 BoogieIcfgContainer [2022-12-13 20:28:30,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:28:30,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:28:30,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:28:30,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:28:30,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:28:20" (1/3) ... [2022-12-13 20:28:30,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b28bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:28:30, skipping insertion in model container [2022-12-13 20:28:30,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:28:21" (2/3) ... [2022-12-13 20:28:30,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b28bba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:28:30, skipping insertion in model container [2022-12-13 20:28:30,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:28:30" (3/3) ... [2022-12-13 20:28:30,638 INFO L112 eAbstractionObserver]: Analyzing ICFG parport.i.cil-2.c [2022-12-13 20:28:30,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:28:30,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:28:30,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:28:30,730 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;@1d468f69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:28:30,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 20:28:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 1728 states, 1203 states have (on average 1.4638403990024937) internal successors, (1761), 1252 states have internal predecessors, (1761), 453 states have call successors, (453), 70 states have call predecessors, (453), 70 states have return successors, (453), 440 states have call predecessors, (453), 453 states have call successors, (453) [2022-12-13 20:28:30,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 20:28:30,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:30,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:30,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:30,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1747724696, now seen corresponding path program 1 times [2022-12-13 20:28:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:30,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937287986] [2022-12-13 20:28:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:30,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:31,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937287986] [2022-12-13 20:28:31,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937287986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:31,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:31,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:28:31,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169082780] [2022-12-13 20:28:31,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 20:28:31,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:31,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 20:28:31,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:28:31,175 INFO L87 Difference]: Start difference. First operand has 1728 states, 1203 states have (on average 1.4638403990024937) internal successors, (1761), 1252 states have internal predecessors, (1761), 453 states have call successors, (453), 70 states have call predecessors, (453), 70 states have return successors, (453), 440 states have call predecessors, (453), 453 states have call successors, (453) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:31,321 INFO L93 Difference]: Finished difference Result 3450 states and 5434 transitions. [2022-12-13 20:28:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 20:28:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 20:28:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:31,339 INFO L225 Difference]: With dead ends: 3450 [2022-12-13 20:28:31,340 INFO L226 Difference]: Without dead ends: 1721 [2022-12-13 20:28:31,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:28:31,351 INFO L413 NwaCegarLoop]: 2577 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:31,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:28:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-12-13 20:28:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1721. [2022-12-13 20:28:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1198 states have (on average 1.3998330550918197) internal successors, (1677), 1245 states have internal predecessors, (1677), 453 states have call successors, (453), 70 states have call predecessors, (453), 69 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2022-12-13 20:28:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2564 transitions. [2022-12-13 20:28:31,464 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2564 transitions. Word has length 15 [2022-12-13 20:28:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:31,464 INFO L495 AbstractCegarLoop]: Abstraction has 1721 states and 2564 transitions. [2022-12-13 20:28:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2564 transitions. [2022-12-13 20:28:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 20:28:31,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:31,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:28:31,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash 12693346, now seen corresponding path program 1 times [2022-12-13 20:28:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:31,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880164834] [2022-12-13 20:28:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:31,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:31,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880164834] [2022-12-13 20:28:31,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880164834] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:31,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:31,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:28:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964006455] [2022-12-13 20:28:31,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:31,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:31,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:31,621 INFO L87 Difference]: Start difference. First operand 1721 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:31,707 INFO L93 Difference]: Finished difference Result 3440 states and 5126 transitions. [2022-12-13 20:28:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:31,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 20:28:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:31,720 INFO L225 Difference]: With dead ends: 3440 [2022-12-13 20:28:31,720 INFO L226 Difference]: Without dead ends: 1723 [2022-12-13 20:28:31,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:31,725 INFO L413 NwaCegarLoop]: 2562 mSDtfsCounter, 1 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5122 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:31,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5122 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:28:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-12-13 20:28:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1722. [2022-12-13 20:28:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1199 states have (on average 1.3994995829858214) internal successors, (1678), 1246 states have internal predecessors, (1678), 453 states have call successors, (453), 70 states have call predecessors, (453), 69 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2022-12-13 20:28:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2565 transitions. [2022-12-13 20:28:31,788 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2565 transitions. Word has length 15 [2022-12-13 20:28:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:31,788 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 2565 transitions. [2022-12-13 20:28:31,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2565 transitions. [2022-12-13 20:28:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:28:31,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:31,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:31,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:28:31,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 25759584, now seen corresponding path program 1 times [2022-12-13 20:28:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109474808] [2022-12-13 20:28:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109474808] [2022-12-13 20:28:31,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109474808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:28:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842024739] [2022-12-13 20:28:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:31,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:31,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:31,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:28:31,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:28:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 20:28:32,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:28:32,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:32,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842024739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:32,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:28:32,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 20:28:32,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414800886] [2022-12-13 20:28:32,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:32,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:32,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:32,478 INFO L87 Difference]: Start difference. First operand 1722 states and 2565 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:32,560 INFO L93 Difference]: Finished difference Result 1792 states and 2653 transitions. [2022-12-13 20:28:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 20:28:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:32,568 INFO L225 Difference]: With dead ends: 1792 [2022-12-13 20:28:32,568 INFO L226 Difference]: Without dead ends: 1773 [2022-12-13 20:28:32,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:32,570 INFO L413 NwaCegarLoop]: 2562 mSDtfsCounter, 2542 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 2626 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:32,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2542 Valid, 2626 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:28:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2022-12-13 20:28:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1764. [2022-12-13 20:28:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1233 states have (on average 1.3965936739659368) internal successors, (1722), 1282 states have internal predecessors, (1722), 457 states have call successors, (457), 74 states have call predecessors, (457), 73 states have return successors, (438), 430 states have call predecessors, (438), 438 states have call successors, (438) [2022-12-13 20:28:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2617 transitions. [2022-12-13 20:28:32,639 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2617 transitions. Word has length 17 [2022-12-13 20:28:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:32,640 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2617 transitions. [2022-12-13 20:28:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2617 transitions. [2022-12-13 20:28:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:28:32,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:32,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:32,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:28:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 20:28:32,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash 11414675, now seen corresponding path program 1 times [2022-12-13 20:28:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:32,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875406532] [2022-12-13 20:28:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:33,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875406532] [2022-12-13 20:28:33,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875406532] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:28:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037853053] [2022-12-13 20:28:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:33,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:33,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:33,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:28:33,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:28:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 20:28:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:28:33,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:28:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037853053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:33,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:28:33,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 20:28:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882856778] [2022-12-13 20:28:33,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:33,423 INFO L87 Difference]: Start difference. First operand 1764 states and 2617 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:33,655 INFO L93 Difference]: Finished difference Result 1780 states and 2636 transitions. [2022-12-13 20:28:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 20:28:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:33,662 INFO L225 Difference]: With dead ends: 1780 [2022-12-13 20:28:33,662 INFO L226 Difference]: Without dead ends: 1764 [2022-12-13 20:28:33,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:33,664 INFO L413 NwaCegarLoop]: 2564 mSDtfsCounter, 0 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5071 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:33,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5071 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:28:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-12-13 20:28:33,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1764. [2022-12-13 20:28:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1233 states have (on average 1.3957826439578265) internal successors, (1721), 1282 states have internal predecessors, (1721), 457 states have call successors, (457), 74 states have call predecessors, (457), 73 states have return successors, (438), 430 states have call predecessors, (438), 438 states have call successors, (438) [2022-12-13 20:28:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 2616 transitions. [2022-12-13 20:28:33,720 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 2616 transitions. Word has length 17 [2022-12-13 20:28:33,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:33,720 INFO L495 AbstractCegarLoop]: Abstraction has 1764 states and 2616 transitions. [2022-12-13 20:28:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 2616 transitions. [2022-12-13 20:28:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 20:28:33,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:33,721 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] [2022-12-13 20:28:33,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:28:33,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:33,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:33,922 INFO L85 PathProgramCache]: Analyzing trace with hash -478438479, now seen corresponding path program 1 times [2022-12-13 20:28:33,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700192550] [2022-12-13 20:28:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:34,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:34,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700192550] [2022-12-13 20:28:34,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700192550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:28:34,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347947886] [2022-12-13 20:28:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:34,098 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:28:34,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:28:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 20:28:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:34,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:28:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:28:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347947886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:28:34,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:28:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 20:28:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121132665] [2022-12-13 20:28:34,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:28:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:28:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:28:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:28:34,638 INFO L87 Difference]: Start difference. First operand 1764 states and 2616 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:34,800 INFO L93 Difference]: Finished difference Result 3529 states and 5235 transitions. [2022-12-13 20:28:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:28:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 20:28:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:34,807 INFO L225 Difference]: With dead ends: 3529 [2022-12-13 20:28:34,807 INFO L226 Difference]: Without dead ends: 1770 [2022-12-13 20:28:34,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:28:34,812 INFO L413 NwaCegarLoop]: 2561 mSDtfsCounter, 2 mSDsluCounter, 7677 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10238 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:34,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10238 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:28:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-12-13 20:28:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1770. [2022-12-13 20:28:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1239 states have (on average 1.393866020984665) internal successors, (1727), 1288 states have internal predecessors, (1727), 457 states have call successors, (457), 74 states have call predecessors, (457), 73 states have return successors, (438), 430 states have call predecessors, (438), 438 states have call successors, (438) [2022-12-13 20:28:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2622 transitions. [2022-12-13 20:28:34,869 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2622 transitions. Word has length 22 [2022-12-13 20:28:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:34,869 INFO L495 AbstractCegarLoop]: Abstraction has 1770 states and 2622 transitions. [2022-12-13 20:28:34,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2622 transitions. [2022-12-13 20:28:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 20:28:34,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:34,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:34,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:28:35,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6e375df-ee70-4874-ac53-51c4e682cc40/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:35,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 307295479, now seen corresponding path program 2 times [2022-12-13 20:28:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:35,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258848845] [2022-12-13 20:28:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:35,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:35,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258848845] [2022-12-13 20:28:35,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258848845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:35,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:35,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:28:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819936945] [2022-12-13 20:28:35,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:35,346 INFO L87 Difference]: Start difference. First operand 1770 states and 2622 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:35,776 INFO L93 Difference]: Finished difference Result 4499 states and 6726 transitions. [2022-12-13 20:28:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:35,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 20:28:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:35,789 INFO L225 Difference]: With dead ends: 4499 [2022-12-13 20:28:35,789 INFO L226 Difference]: Without dead ends: 3330 [2022-12-13 20:28:35,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:35,793 INFO L413 NwaCegarLoop]: 4506 mSDtfsCounter, 2447 mSDsluCounter, 2304 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2447 SdHoareTripleChecker+Valid, 6810 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:35,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2447 Valid, 6810 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:28:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-12-13 20:28:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3299. [2022-12-13 20:28:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2308 states have (on average 1.389948006932409) internal successors, (3208), 2376 states have internal predecessors, (3208), 851 states have call successors, (851), 142 states have call predecessors, (851), 139 states have return successors, (869), 818 states have call predecessors, (869), 835 states have call successors, (869) [2022-12-13 20:28:35,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4928 transitions. [2022-12-13 20:28:35,924 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4928 transitions. Word has length 28 [2022-12-13 20:28:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:35,924 INFO L495 AbstractCegarLoop]: Abstraction has 3299 states and 4928 transitions. [2022-12-13 20:28:35,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4928 transitions. [2022-12-13 20:28:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 20:28:35,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:35,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:28:35,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:35,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1796297636, now seen corresponding path program 1 times [2022-12-13 20:28:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:35,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332898665] [2022-12-13 20:28:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:36,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:28:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:36,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332898665] [2022-12-13 20:28:36,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332898665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:36,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:36,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:28:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308454057] [2022-12-13 20:28:36,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:36,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:28:36,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:28:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:28:36,102 INFO L87 Difference]: Start difference. First operand 3299 states and 4928 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:39,964 INFO L93 Difference]: Finished difference Result 4067 states and 6046 transitions. [2022-12-13 20:28:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:28:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-12-13 20:28:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:39,981 INFO L225 Difference]: With dead ends: 4067 [2022-12-13 20:28:39,981 INFO L226 Difference]: Without dead ends: 4062 [2022-12-13 20:28:39,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:39,983 INFO L413 NwaCegarLoop]: 1318 mSDtfsCounter, 2540 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 3436 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 3264 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 3436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:39,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2864 Valid, 3264 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 3436 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 20:28:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2022-12-13 20:28:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 4033. [2022-12-13 20:28:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2759 states have (on average 1.3794853207683944) internal successors, (3806), 2837 states have internal predecessors, (3806), 1088 states have call successors, (1088), 187 states have call predecessors, (1088), 185 states have return successors, (1107), 1051 states have call predecessors, (1107), 1072 states have call successors, (1107) [2022-12-13 20:28:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 6001 transitions. [2022-12-13 20:28:40,149 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 6001 transitions. Word has length 40 [2022-12-13 20:28:40,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:40,149 INFO L495 AbstractCegarLoop]: Abstraction has 4033 states and 6001 transitions. [2022-12-13 20:28:40,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 6001 transitions. [2022-12-13 20:28:40,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 20:28:40,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:40,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:40,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:28:40,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash 601875904, now seen corresponding path program 1 times [2022-12-13 20:28:40,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:40,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136567378] [2022-12-13 20:28:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:40,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:40,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:28:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:40,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136567378] [2022-12-13 20:28:40,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136567378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:40,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:28:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405150695] [2022-12-13 20:28:40,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:40,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:28:40,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:28:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:28:40,457 INFO L87 Difference]: Start difference. First operand 4033 states and 6001 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:45,249 INFO L93 Difference]: Finished difference Result 4080 states and 6058 transitions. [2022-12-13 20:28:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:28:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-12-13 20:28:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:45,261 INFO L225 Difference]: With dead ends: 4080 [2022-12-13 20:28:45,261 INFO L226 Difference]: Without dead ends: 4071 [2022-12-13 20:28:45,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:28:45,263 INFO L413 NwaCegarLoop]: 1295 mSDtfsCounter, 5848 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 5206 mSolverCounterSat, 3669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5980 SdHoareTripleChecker+Valid, 3937 SdHoareTripleChecker+Invalid, 8875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3669 IncrementalHoareTripleChecker+Valid, 5206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:45,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5980 Valid, 3937 Invalid, 8875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3669 Valid, 5206 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-13 20:28:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2022-12-13 20:28:45,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 4033. [2022-12-13 20:28:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2759 states have (on average 1.3787604204421893) internal successors, (3804), 2837 states have internal predecessors, (3804), 1088 states have call successors, (1088), 187 states have call predecessors, (1088), 185 states have return successors, (1107), 1051 states have call predecessors, (1107), 1072 states have call successors, (1107) [2022-12-13 20:28:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5999 transitions. [2022-12-13 20:28:45,434 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5999 transitions. Word has length 41 [2022-12-13 20:28:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:45,434 INFO L495 AbstractCegarLoop]: Abstraction has 4033 states and 5999 transitions. [2022-12-13 20:28:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5999 transitions. [2022-12-13 20:28:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 20:28:45,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:45,436 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:45,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:28:45,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash 588958024, now seen corresponding path program 1 times [2022-12-13 20:28:45,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:45,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854230651] [2022-12-13 20:28:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:45,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:28:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:45,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854230651] [2022-12-13 20:28:45,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854230651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:45,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:45,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:28:45,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808914611] [2022-12-13 20:28:45,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:28:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:28:45,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:28:45,664 INFO L87 Difference]: Start difference. First operand 4033 states and 5999 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:50,867 INFO L93 Difference]: Finished difference Result 4073 states and 6047 transitions. [2022-12-13 20:28:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:28:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-12-13 20:28:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:50,878 INFO L225 Difference]: With dead ends: 4073 [2022-12-13 20:28:50,878 INFO L226 Difference]: Without dead ends: 4064 [2022-12-13 20:28:50,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:28:50,880 INFO L413 NwaCegarLoop]: 1295 mSDtfsCounter, 5779 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 5274 mSolverCounterSat, 3579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5911 SdHoareTripleChecker+Valid, 3932 SdHoareTripleChecker+Invalid, 8853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3579 IncrementalHoareTripleChecker+Valid, 5274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:50,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5911 Valid, 3932 Invalid, 8853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3579 Valid, 5274 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 20:28:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-12-13 20:28:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4033. [2022-12-13 20:28:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 2759 states have (on average 1.378035520115984) internal successors, (3802), 2837 states have internal predecessors, (3802), 1088 states have call successors, (1088), 187 states have call predecessors, (1088), 185 states have return successors, (1107), 1051 states have call predecessors, (1107), 1072 states have call successors, (1107) [2022-12-13 20:28:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 5997 transitions. [2022-12-13 20:28:51,092 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 5997 transitions. Word has length 42 [2022-12-13 20:28:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:51,092 INFO L495 AbstractCegarLoop]: Abstraction has 4033 states and 5997 transitions. [2022-12-13 20:28:51,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:51,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 5997 transitions. [2022-12-13 20:28:51,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:28:51,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:51,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:51,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:28:51,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1278856833, now seen corresponding path program 1 times [2022-12-13 20:28:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:51,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67757667] [2022-12-13 20:28:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:51,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67757667] [2022-12-13 20:28:51,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67757667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:51,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:51,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:28:51,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924822768] [2022-12-13 20:28:51,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:51,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:51,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:51,282 INFO L87 Difference]: Start difference. First operand 4033 states and 5997 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:51,510 INFO L93 Difference]: Finished difference Result 6594 states and 9782 transitions. [2022-12-13 20:28:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:51,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 20:28:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:51,533 INFO L225 Difference]: With dead ends: 6594 [2022-12-13 20:28:51,533 INFO L226 Difference]: Without dead ends: 6291 [2022-12-13 20:28:51,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:51,537 INFO L413 NwaCegarLoop]: 3671 mSDtfsCounter, 2445 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 5495 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:51,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2445 Valid, 5495 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:28:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2022-12-13 20:28:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 6210. [2022-12-13 20:28:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 4199 states have (on average 1.3786615860919267) internal successors, (5789), 4317 states have internal predecessors, (5789), 1726 states have call successors, (1726), 283 states have call predecessors, (1726), 284 states have return successors, (1757), 1678 states have call predecessors, (1757), 1713 states have call successors, (1757) [2022-12-13 20:28:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 9272 transitions. [2022-12-13 20:28:51,928 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 9272 transitions. Word has length 43 [2022-12-13 20:28:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:51,928 INFO L495 AbstractCegarLoop]: Abstraction has 6210 states and 9272 transitions. [2022-12-13 20:28:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 9272 transitions. [2022-12-13 20:28:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:28:51,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:51,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:28:51,931 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1132671081, now seen corresponding path program 1 times [2022-12-13 20:28:51,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:51,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397182274] [2022-12-13 20:28:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:28:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397182274] [2022-12-13 20:28:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397182274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:52,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:52,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:28:52,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578890030] [2022-12-13 20:28:52,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:28:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:52,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:28:52,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:28:52,235 INFO L87 Difference]: Start difference. First operand 6210 states and 9272 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:55,328 INFO L93 Difference]: Finished difference Result 6238 states and 9306 transitions. [2022-12-13 20:28:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:28:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-12-13 20:28:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:55,344 INFO L225 Difference]: With dead ends: 6238 [2022-12-13 20:28:55,344 INFO L226 Difference]: Without dead ends: 6192 [2022-12-13 20:28:55,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:28:55,348 INFO L413 NwaCegarLoop]: 1272 mSDtfsCounter, 1095 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 4468 SdHoareTripleChecker+Invalid, 4442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:55,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 4468 Invalid, 4442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 4257 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 20:28:55,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6192 states. [2022-12-13 20:28:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6192 to 6191. [2022-12-13 20:28:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 4186 states have (on average 1.3786430960344003) internal successors, (5771), 4304 states have internal predecessors, (5771), 1720 states have call successors, (1720), 283 states have call predecessors, (1720), 284 states have return successors, (1751), 1672 states have call predecessors, (1751), 1707 states have call successors, (1751) [2022-12-13 20:28:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 9242 transitions. [2022-12-13 20:28:55,678 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 9242 transitions. Word has length 43 [2022-12-13 20:28:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:55,679 INFO L495 AbstractCegarLoop]: Abstraction has 6191 states and 9242 transitions. [2022-12-13 20:28:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:28:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 9242 transitions. [2022-12-13 20:28:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:28:55,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:55,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:28:55,680 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -323587381, now seen corresponding path program 1 times [2022-12-13 20:28:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:55,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550523915] [2022-12-13 20:28:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:55,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:55,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550523915] [2022-12-13 20:28:55,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550523915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:55,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:55,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:28:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76982205] [2022-12-13 20:28:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:28:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:28:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:55,878 INFO L87 Difference]: Start difference. First operand 6191 states and 9242 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:56,235 INFO L93 Difference]: Finished difference Result 6194 states and 9244 transitions. [2022-12-13 20:28:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:28:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 20:28:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:56,251 INFO L225 Difference]: With dead ends: 6194 [2022-12-13 20:28:56,251 INFO L226 Difference]: Without dead ends: 6191 [2022-12-13 20:28:56,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:28:56,254 INFO L413 NwaCegarLoop]: 2516 mSDtfsCounter, 12 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4974 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:56,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4974 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:28:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6191 states. [2022-12-13 20:28:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6191 to 6191. [2022-12-13 20:28:56,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6191 states, 4186 states have (on average 1.378404204491161) internal successors, (5770), 4304 states have internal predecessors, (5770), 1720 states have call successors, (1720), 283 states have call predecessors, (1720), 284 states have return successors, (1751), 1672 states have call predecessors, (1751), 1707 states have call successors, (1751) [2022-12-13 20:28:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 9241 transitions. [2022-12-13 20:28:56,556 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 9241 transitions. Word has length 43 [2022-12-13 20:28:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:56,557 INFO L495 AbstractCegarLoop]: Abstraction has 6191 states and 9241 transitions. [2022-12-13 20:28:56,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:28:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 9241 transitions. [2022-12-13 20:28:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 20:28:56,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:56,558 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:56,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 20:28:56,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:28:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:56,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2052618280, now seen corresponding path program 1 times [2022-12-13 20:28:56,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837210282] [2022-12-13 20:28:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:56,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:56,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:28:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:28:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:28:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837210282] [2022-12-13 20:28:56,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837210282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:28:56,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:28:56,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:28:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572044886] [2022-12-13 20:28:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:28:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:28:56,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:28:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:28:56,884 INFO L87 Difference]: Start difference. First operand 6191 states and 9241 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:00,723 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 [] [2022-12-13 20:29:04,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:09,174 INFO L93 Difference]: Finished difference Result 12680 states and 19034 transitions. [2022-12-13 20:29:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:29:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-12-13 20:29:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:09,193 INFO L225 Difference]: With dead ends: 12680 [2022-12-13 20:29:09,194 INFO L226 Difference]: Without dead ends: 7064 [2022-12-13 20:29:09,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:29:09,206 INFO L413 NwaCegarLoop]: 1542 mSDtfsCounter, 760 mSDsluCounter, 8761 mSDsCounter, 0 mSdLazyCounter, 9608 mSolverCounterSat, 363 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 10303 SdHoareTripleChecker+Invalid, 9972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 9608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:09,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 10303 Invalid, 9972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [363 Valid, 9608 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2022-12-13 20:29:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2022-12-13 20:29:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 6200. [2022-12-13 20:29:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6200 states, 4193 states have (on average 1.377772477939423) internal successors, (5777), 4311 states have internal predecessors, (5777), 1720 states have call successors, (1720), 283 states have call predecessors, (1720), 286 states have return successors, (1756), 1674 states have call predecessors, (1756), 1707 states have call successors, (1756) [2022-12-13 20:29:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6200 states to 6200 states and 9253 transitions. [2022-12-13 20:29:09,555 INFO L78 Accepts]: Start accepts. Automaton has 6200 states and 9253 transitions. Word has length 46 [2022-12-13 20:29:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:09,555 INFO L495 AbstractCegarLoop]: Abstraction has 6200 states and 9253 transitions. [2022-12-13 20:29:09,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6200 states and 9253 transitions. [2022-12-13 20:29:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 20:29:09,556 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:09,556 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:09,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 20:29:09,557 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:29:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1841267367, now seen corresponding path program 1 times [2022-12-13 20:29:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:09,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285293606] [2022-12-13 20:29:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:09,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:29:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:29:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:29:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:09,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285293606] [2022-12-13 20:29:09,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285293606] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:09,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:09,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:29:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743744437] [2022-12-13 20:29:09,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:29:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:09,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:29:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:09,858 INFO L87 Difference]: Start difference. First operand 6200 states and 9253 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:13,250 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 [] [2022-12-13 20:29:16,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:20,726 INFO L93 Difference]: Finished difference Result 7096 states and 10689 transitions. [2022-12-13 20:29:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:29:20,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-12-13 20:29:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:20,745 INFO L225 Difference]: With dead ends: 7096 [2022-12-13 20:29:20,745 INFO L226 Difference]: Without dead ends: 7057 [2022-12-13 20:29:20,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:29:20,749 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 755 mSDsluCounter, 5949 mSDsCounter, 0 mSdLazyCounter, 7050 mSolverCounterSat, 366 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 7469 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 7050 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:20,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 7469 Invalid, 7417 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [366 Valid, 7050 Invalid, 1 Unknown, 0 Unchecked, 10.4s Time] [2022-12-13 20:29:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2022-12-13 20:29:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6194. [2022-12-13 20:29:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 4188 states have (on average 1.377984718242598) internal successors, (5771), 4306 states have internal predecessors, (5771), 1720 states have call successors, (1720), 283 states have call predecessors, (1720), 285 states have return successors, (1753), 1673 states have call predecessors, (1753), 1707 states have call successors, (1753) [2022-12-13 20:29:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 9244 transitions. [2022-12-13 20:29:21,094 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 9244 transitions. Word has length 46 [2022-12-13 20:29:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:21,094 INFO L495 AbstractCegarLoop]: Abstraction has 6194 states and 9244 transitions. [2022-12-13 20:29:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 9244 transitions. [2022-12-13 20:29:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:29:21,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:21,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:21,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 20:29:21,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:29:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1771103344, now seen corresponding path program 1 times [2022-12-13 20:29:21,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:21,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189835666] [2022-12-13 20:29:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:21,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:21,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:29:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:21,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:29:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:29:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:21,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189835666] [2022-12-13 20:29:21,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189835666] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:21,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:21,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:29:21,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26497955] [2022-12-13 20:29:21,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:21,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:29:21,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:29:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:29:21,436 INFO L87 Difference]: Start difference. First operand 6194 states and 9244 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 20:29:25,485 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 [] [2022-12-13 20:29:30,087 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 [] [2022-12-13 20:29:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:34,635 INFO L93 Difference]: Finished difference Result 7054 states and 10635 transitions. [2022-12-13 20:29:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:29:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-12-13 20:29:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:34,653 INFO L225 Difference]: With dead ends: 7054 [2022-12-13 20:29:34,653 INFO L226 Difference]: Without dead ends: 7024 [2022-12-13 20:29:34,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:29:34,656 INFO L413 NwaCegarLoop]: 1213 mSDtfsCounter, 1133 mSDsluCounter, 6899 mSDsCounter, 0 mSdLazyCounter, 10085 mSolverCounterSat, 391 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 8112 SdHoareTripleChecker+Invalid, 10478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 10085 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:34,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 8112 Invalid, 10478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 10085 Invalid, 2 Unknown, 0 Unchecked, 12.7s Time] [2022-12-13 20:29:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7024 states. [2022-12-13 20:29:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7024 to 6192. [2022-12-13 20:29:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 4187 states have (on average 1.3778361595414377) internal successors, (5769), 4305 states have internal predecessors, (5769), 1719 states have call successors, (1719), 283 states have call predecessors, (1719), 285 states have return successors, (1752), 1672 states have call predecessors, (1752), 1706 states have call successors, (1752) [2022-12-13 20:29:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9240 transitions. [2022-12-13 20:29:35,027 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9240 transitions. Word has length 47 [2022-12-13 20:29:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:35,028 INFO L495 AbstractCegarLoop]: Abstraction has 6192 states and 9240 transitions. [2022-12-13 20:29:35,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 20:29:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9240 transitions. [2022-12-13 20:29:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 20:29:35,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:35,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:35,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:29:35,029 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:29:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1404767676, now seen corresponding path program 1 times [2022-12-13 20:29:35,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:35,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058008818] [2022-12-13 20:29:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:29:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:35,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:29:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:29:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058008818] [2022-12-13 20:29:35,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058008818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:35,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:35,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:29:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87593957] [2022-12-13 20:29:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:29:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:29:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:29:35,366 INFO L87 Difference]: Start difference. First operand 6192 states and 9240 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:37,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:39,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:44,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:51,369 INFO L93 Difference]: Finished difference Result 8304 states and 12651 transitions. [2022-12-13 20:29:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:29:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-12-13 20:29:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:51,386 INFO L225 Difference]: With dead ends: 8304 [2022-12-13 20:29:51,386 INFO L226 Difference]: Without dead ends: 8264 [2022-12-13 20:29:51,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:29:51,389 INFO L413 NwaCegarLoop]: 1955 mSDtfsCounter, 1154 mSDsluCounter, 10832 mSDsCounter, 0 mSdLazyCounter, 10010 mSolverCounterSat, 381 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 12787 SdHoareTripleChecker+Invalid, 10393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 10010 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:51,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 12787 Invalid, 10393 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [381 Valid, 10010 Invalid, 2 Unknown, 0 Unchecked, 15.4s Time] [2022-12-13 20:29:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2022-12-13 20:29:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 6197. [2022-12-13 20:29:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6197 states, 4191 states have (on average 1.3774755428298735) internal successors, (5773), 4309 states have internal predecessors, (5773), 1719 states have call successors, (1719), 283 states have call predecessors, (1719), 286 states have return successors, (1755), 1673 states have call predecessors, (1755), 1706 states have call successors, (1755) [2022-12-13 20:29:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 9247 transitions. [2022-12-13 20:29:51,770 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 9247 transitions. Word has length 50 [2022-12-13 20:29:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:51,771 INFO L495 AbstractCegarLoop]: Abstraction has 6197 states and 9247 transitions. [2022-12-13 20:29:51,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 9247 transitions. [2022-12-13 20:29:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 20:29:51,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:51,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 20:29:51,772 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:29:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 852143331, now seen corresponding path program 1 times [2022-12-13 20:29:51,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:51,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240507692] [2022-12-13 20:29:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:29:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:29:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:29:52,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:52,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240507692] [2022-12-13 20:29:52,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240507692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:52,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:52,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:29:52,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714570892] [2022-12-13 20:29:52,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:52,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:29:52,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:29:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:52,017 INFO L87 Difference]: Start difference. First operand 6197 states and 9247 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:29:53,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:56,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:29:58,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:30:00,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:30:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:04,518 INFO L93 Difference]: Finished difference Result 7069 states and 10652 transitions. [2022-12-13 20:30:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:30:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-12-13 20:30:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:04,538 INFO L225 Difference]: With dead ends: 7069 [2022-12-13 20:30:04,538 INFO L226 Difference]: Without dead ends: 7029 [2022-12-13 20:30:04,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:30:04,541 INFO L413 NwaCegarLoop]: 1505 mSDtfsCounter, 1149 mSDsluCounter, 5446 mSDsCounter, 0 mSdLazyCounter, 6986 mSolverCounterSat, 359 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 6951 SdHoareTripleChecker+Invalid, 7346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 6986 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:04,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1449 Valid, 6951 Invalid, 7346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 6986 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2022-12-13 20:30:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2022-12-13 20:30:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 6192. [2022-12-13 20:30:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 4187 states have (on average 1.3775973250537377) internal successors, (5768), 4305 states have internal predecessors, (5768), 1719 states have call successors, (1719), 283 states have call predecessors, (1719), 285 states have return successors, (1752), 1672 states have call predecessors, (1752), 1706 states have call successors, (1752) [2022-12-13 20:30:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 9239 transitions. [2022-12-13 20:30:04,889 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 9239 transitions. Word has length 50 [2022-12-13 20:30:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:04,889 INFO L495 AbstractCegarLoop]: Abstraction has 6192 states and 9239 transitions. [2022-12-13 20:30:04,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 9239 transitions. [2022-12-13 20:30:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:30:04,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:04,890 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:30:04,891 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 900358753, now seen corresponding path program 1 times [2022-12-13 20:30:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808465213] [2022-12-13 20:30:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:05,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808465213] [2022-12-13 20:30:05,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808465213] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:05,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:05,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:30:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133333541] [2022-12-13 20:30:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:05,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:30:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:30:05,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:30:05,069 INFO L87 Difference]: Start difference. First operand 6192 states and 9239 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:05,463 INFO L93 Difference]: Finished difference Result 6284 states and 9363 transitions. [2022-12-13 20:30:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:30:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 20:30:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:05,476 INFO L225 Difference]: With dead ends: 6284 [2022-12-13 20:30:05,476 INFO L226 Difference]: Without dead ends: 6253 [2022-12-13 20:30:05,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:30:05,478 INFO L413 NwaCegarLoop]: 2530 mSDtfsCounter, 160 mSDsluCounter, 10159 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 12689 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:05,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 12689 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:30:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2022-12-13 20:30:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 6195. [2022-12-13 20:30:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6195 states, 4190 states have (on average 1.377326968973747) internal successors, (5771), 4308 states have internal predecessors, (5771), 1719 states have call successors, (1719), 283 states have call predecessors, (1719), 285 states have return successors, (1752), 1672 states have call predecessors, (1752), 1706 states have call successors, (1752) [2022-12-13 20:30:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 9242 transitions. [2022-12-13 20:30:05,803 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 9242 transitions. Word has length 45 [2022-12-13 20:30:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:05,803 INFO L495 AbstractCegarLoop]: Abstraction has 6195 states and 9242 transitions. [2022-12-13 20:30:05,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:05,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 9242 transitions. [2022-12-13 20:30:05,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:30:05,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:05,804 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:05,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 20:30:05,805 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1606233439, now seen corresponding path program 1 times [2022-12-13 20:30:05,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:05,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548404573] [2022-12-13 20:30:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:05,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:05,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:05,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548404573] [2022-12-13 20:30:05,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548404573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:05,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:05,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:30:05,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818656390] [2022-12-13 20:30:05,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:05,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:30:05,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:30:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:30:05,954 INFO L87 Difference]: Start difference. First operand 6195 states and 9242 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:06,337 INFO L93 Difference]: Finished difference Result 6280 states and 9356 transitions. [2022-12-13 20:30:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:30:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 20:30:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:06,349 INFO L225 Difference]: With dead ends: 6280 [2022-12-13 20:30:06,349 INFO L226 Difference]: Without dead ends: 6249 [2022-12-13 20:30:06,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:30:06,351 INFO L413 NwaCegarLoop]: 2535 mSDtfsCounter, 160 mSDsluCounter, 10156 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 12691 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:06,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 12691 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:30:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6249 states. [2022-12-13 20:30:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6249 to 6188. [2022-12-13 20:30:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6188 states, 4184 states have (on average 1.3773900573613767) internal successors, (5763), 4301 states have internal predecessors, (5763), 1718 states have call successors, (1718), 283 states have call predecessors, (1718), 285 states have return successors, (1751), 1671 states have call predecessors, (1751), 1705 states have call successors, (1751) [2022-12-13 20:30:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6188 states to 6188 states and 9232 transitions. [2022-12-13 20:30:06,683 INFO L78 Accepts]: Start accepts. Automaton has 6188 states and 9232 transitions. Word has length 45 [2022-12-13 20:30:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:06,683 INFO L495 AbstractCegarLoop]: Abstraction has 6188 states and 9232 transitions. [2022-12-13 20:30:06,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6188 states and 9232 transitions. [2022-12-13 20:30:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 20:30:06,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:06,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:06,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 20:30:06,684 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash 752543076, now seen corresponding path program 1 times [2022-12-13 20:30:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:06,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887170608] [2022-12-13 20:30:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:06,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 20:30:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:06,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:30:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:06,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887170608] [2022-12-13 20:30:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887170608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:06,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:30:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143407059] [2022-12-13 20:30:06,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:06,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:30:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:30:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:30:06,885 INFO L87 Difference]: Start difference. First operand 6188 states and 9232 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:11,867 INFO L93 Difference]: Finished difference Result 7047 states and 10622 transitions. [2022-12-13 20:30:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:30:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-12-13 20:30:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:11,882 INFO L225 Difference]: With dead ends: 7047 [2022-12-13 20:30:11,882 INFO L226 Difference]: Without dead ends: 7017 [2022-12-13 20:30:11,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:30:11,884 INFO L413 NwaCegarLoop]: 1210 mSDtfsCounter, 1754 mSDsluCounter, 4128 mSDsCounter, 0 mSdLazyCounter, 6639 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 5338 SdHoareTripleChecker+Invalid, 7635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 6639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:11,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2064 Valid, 5338 Invalid, 7635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 6639 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-13 20:30:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2022-12-13 20:30:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6185. [2022-12-13 20:30:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6185 states, 4182 states have (on average 1.3773314203730274) internal successors, (5760), 4299 states have internal predecessors, (5760), 1717 states have call successors, (1717), 283 states have call predecessors, (1717), 285 states have return successors, (1750), 1670 states have call predecessors, (1750), 1704 states have call successors, (1750) [2022-12-13 20:30:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6185 states to 6185 states and 9227 transitions. [2022-12-13 20:30:12,230 INFO L78 Accepts]: Start accepts. Automaton has 6185 states and 9227 transitions. Word has length 53 [2022-12-13 20:30:12,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:12,230 INFO L495 AbstractCegarLoop]: Abstraction has 6185 states and 9227 transitions. [2022-12-13 20:30:12,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:12,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6185 states and 9227 transitions. [2022-12-13 20:30:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 20:30:12,231 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:12,231 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:12,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 20:30:12,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:12,232 INFO L85 PathProgramCache]: Analyzing trace with hash -491344575, now seen corresponding path program 1 times [2022-12-13 20:30:12,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:12,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235673780] [2022-12-13 20:30:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:12,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:30:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:30:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235673780] [2022-12-13 20:30:12,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235673780] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:12,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:30:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925749078] [2022-12-13 20:30:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:12,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:30:12,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:30:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:30:12,481 INFO L87 Difference]: Start difference. First operand 6185 states and 9227 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:17,906 INFO L93 Difference]: Finished difference Result 7044 states and 10617 transitions. [2022-12-13 20:30:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:30:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-12-13 20:30:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:17,918 INFO L225 Difference]: With dead ends: 7044 [2022-12-13 20:30:17,919 INFO L226 Difference]: Without dead ends: 7008 [2022-12-13 20:30:17,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:30:17,920 INFO L413 NwaCegarLoop]: 1177 mSDtfsCounter, 1766 mSDsluCounter, 4032 mSDsCounter, 0 mSdLazyCounter, 6563 mSolverCounterSat, 1008 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2076 SdHoareTripleChecker+Valid, 5209 SdHoareTripleChecker+Invalid, 7571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 6563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:17,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2076 Valid, 5209 Invalid, 7571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1008 Valid, 6563 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 20:30:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2022-12-13 20:30:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 6176. [2022-12-13 20:30:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6176 states, 4176 states have (on average 1.3773946360153257) internal successors, (5752), 4293 states have internal predecessors, (5752), 1715 states have call successors, (1715), 282 states have call predecessors, (1715), 284 states have return successors, (1748), 1668 states have call predecessors, (1748), 1702 states have call successors, (1748) [2022-12-13 20:30:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 9215 transitions. [2022-12-13 20:30:18,265 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 9215 transitions. Word has length 50 [2022-12-13 20:30:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:18,265 INFO L495 AbstractCegarLoop]: Abstraction has 6176 states and 9215 transitions. [2022-12-13 20:30:18,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 9215 transitions. [2022-12-13 20:30:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:30:18,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:18,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:18,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 20:30:18,266 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:18,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2048298195, now seen corresponding path program 1 times [2022-12-13 20:30:18,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:18,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495549802] [2022-12-13 20:30:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:18,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:30:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:30:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495549802] [2022-12-13 20:30:18,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495549802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:18,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:18,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:30:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336860442] [2022-12-13 20:30:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:30:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:30:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:30:18,526 INFO L87 Difference]: Start difference. First operand 6176 states and 9215 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:30:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:24,389 INFO L93 Difference]: Finished difference Result 11648 states and 17459 transitions. [2022-12-13 20:30:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:30:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-12-13 20:30:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:24,403 INFO L225 Difference]: With dead ends: 11648 [2022-12-13 20:30:24,403 INFO L226 Difference]: Without dead ends: 6880 [2022-12-13 20:30:24,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:30:24,411 INFO L413 NwaCegarLoop]: 1197 mSDtfsCounter, 1758 mSDsluCounter, 5141 mSDsCounter, 0 mSdLazyCounter, 8161 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 6338 SdHoareTripleChecker+Invalid, 9147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 8161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:24,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 6338 Invalid, 9147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 8161 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-13 20:30:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-12-13 20:30:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6022. [2022-12-13 20:30:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6022 states, 4061 states have (on average 1.3747845358286137) internal successors, (5583), 4163 states have internal predecessors, (5583), 1684 states have call successors, (1684), 270 states have call predecessors, (1684), 276 states have return successors, (1702), 1656 states have call predecessors, (1702), 1674 states have call successors, (1702) [2022-12-13 20:30:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 8969 transitions. [2022-12-13 20:30:24,768 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 8969 transitions. Word has length 58 [2022-12-13 20:30:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:24,768 INFO L495 AbstractCegarLoop]: Abstraction has 6022 states and 8969 transitions. [2022-12-13 20:30:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:30:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 8969 transitions. [2022-12-13 20:30:24,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 20:30:24,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:24,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:24,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 20:30:24,770 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:24,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1591264843, now seen corresponding path program 1 times [2022-12-13 20:30:24,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:24,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300294790] [2022-12-13 20:30:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:24,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:30:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:24,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:25,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300294790] [2022-12-13 20:30:25,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300294790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:25,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:25,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:30:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599427256] [2022-12-13 20:30:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:30:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:30:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:30:25,006 INFO L87 Difference]: Start difference. First operand 6022 states and 8969 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:28,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:30:33,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:30:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:36,527 INFO L93 Difference]: Finished difference Result 7026 states and 10550 transitions. [2022-12-13 20:30:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:30:36,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-12-13 20:30:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:36,542 INFO L225 Difference]: With dead ends: 7026 [2022-12-13 20:30:36,542 INFO L226 Difference]: Without dead ends: 6932 [2022-12-13 20:30:36,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:30:36,544 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 921 mSDsluCounter, 5703 mSDsCounter, 0 mSdLazyCounter, 7090 mSolverCounterSat, 374 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 7223 SdHoareTripleChecker+Invalid, 7466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 7090 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:36,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 7223 Invalid, 7466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 7090 Invalid, 2 Unknown, 0 Unchecked, 11.0s Time] [2022-12-13 20:30:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2022-12-13 20:30:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6024. [2022-12-13 20:30:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 4063 states have (on average 1.3743539256706867) internal successors, (5584), 4165 states have internal predecessors, (5584), 1684 states have call successors, (1684), 270 states have call predecessors, (1684), 276 states have return successors, (1702), 1656 states have call predecessors, (1702), 1674 states have call successors, (1702) [2022-12-13 20:30:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 8970 transitions. [2022-12-13 20:30:36,905 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 8970 transitions. Word has length 54 [2022-12-13 20:30:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:36,906 INFO L495 AbstractCegarLoop]: Abstraction has 6024 states and 8970 transitions. [2022-12-13 20:30:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 20:30:36,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 8970 transitions. [2022-12-13 20:30:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 20:30:36,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:36,907 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:36,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 20:30:36,907 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:36,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1790097882, now seen corresponding path program 1 times [2022-12-13 20:30:36,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:36,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302155442] [2022-12-13 20:30:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:36,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:37,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:30:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:37,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:37,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:37,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302155442] [2022-12-13 20:30:37,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302155442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:37,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:37,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:30:37,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083600952] [2022-12-13 20:30:37,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:37,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:30:37,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:37,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:30:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:30:37,182 INFO L87 Difference]: Start difference. First operand 6024 states and 8970 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 20:30:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:43,987 INFO L93 Difference]: Finished difference Result 6883 states and 10358 transitions. [2022-12-13 20:30:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:30:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-12-13 20:30:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:44,001 INFO L225 Difference]: With dead ends: 6883 [2022-12-13 20:30:44,001 INFO L226 Difference]: Without dead ends: 6853 [2022-12-13 20:30:44,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:30:44,003 INFO L413 NwaCegarLoop]: 1156 mSDtfsCounter, 1786 mSDsluCounter, 6033 mSDsCounter, 0 mSdLazyCounter, 9569 mSolverCounterSat, 1002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2094 SdHoareTripleChecker+Valid, 7189 SdHoareTripleChecker+Invalid, 10571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1002 IncrementalHoareTripleChecker+Valid, 9569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2094 Valid, 7189 Invalid, 10571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1002 Valid, 9569 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-13 20:30:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2022-12-13 20:30:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 6022. [2022-12-13 20:30:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6022 states, 4062 states have (on average 1.3741999015263417) internal successors, (5582), 4164 states have internal predecessors, (5582), 1683 states have call successors, (1683), 270 states have call predecessors, (1683), 276 states have return successors, (1701), 1655 states have call predecessors, (1701), 1673 states have call successors, (1701) [2022-12-13 20:30:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 8966 transitions. [2022-12-13 20:30:44,366 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 8966 transitions. Word has length 55 [2022-12-13 20:30:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:44,366 INFO L495 AbstractCegarLoop]: Abstraction has 6022 states and 8966 transitions. [2022-12-13 20:30:44,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 20:30:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 8966 transitions. [2022-12-13 20:30:44,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 20:30:44,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:44,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:44,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 20:30:44,367 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:44,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1976910524, now seen corresponding path program 1 times [2022-12-13 20:30:44,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:44,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219754058] [2022-12-13 20:30:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:44,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:44,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:30:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:44,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 20:30:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219754058] [2022-12-13 20:30:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219754058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:44,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:44,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:30:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078666722] [2022-12-13 20:30:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:30:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:30:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:30:44,619 INFO L87 Difference]: Start difference. First operand 6022 states and 8966 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 20:30:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:49,710 INFO L93 Difference]: Finished difference Result 6167 states and 9161 transitions. [2022-12-13 20:30:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:30:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-12-13 20:30:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:49,721 INFO L225 Difference]: With dead ends: 6167 [2022-12-13 20:30:49,721 INFO L226 Difference]: Without dead ends: 6126 [2022-12-13 20:30:49,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:30:49,723 INFO L413 NwaCegarLoop]: 1256 mSDtfsCounter, 1126 mSDsluCounter, 6527 mSDsCounter, 0 mSdLazyCounter, 8452 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 7783 SdHoareTripleChecker+Invalid, 8625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 8452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:49,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 7783 Invalid, 8625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 8452 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-13 20:30:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2022-12-13 20:30:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 6027. [2022-12-13 20:30:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 4066 states have (on average 1.3738317757009346) internal successors, (5586), 4167 states have internal predecessors, (5586), 1683 states have call successors, (1683), 270 states have call predecessors, (1683), 277 states have return successors, (1702), 1657 states have call predecessors, (1702), 1673 states have call successors, (1702) [2022-12-13 20:30:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 8971 transitions. [2022-12-13 20:30:50,081 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 8971 transitions. Word has length 56 [2022-12-13 20:30:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:50,081 INFO L495 AbstractCegarLoop]: Abstraction has 6027 states and 8971 transitions. [2022-12-13 20:30:50,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 20:30:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 8971 transitions. [2022-12-13 20:30:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 20:30:50,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:50,083 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:50,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 20:30:50,083 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1624955075, now seen corresponding path program 1 times [2022-12-13 20:30:50,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:50,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418420039] [2022-12-13 20:30:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:50,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:50,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:30:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:30:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:50,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 20:30:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:50,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:50,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418420039] [2022-12-13 20:30:50,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418420039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:50,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:50,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:30:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110785264] [2022-12-13 20:30:50,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:50,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:30:50,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:30:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:30:50,311 INFO L87 Difference]: Start difference. First operand 6027 states and 8971 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 20:30:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:54,399 INFO L93 Difference]: Finished difference Result 6055 states and 9005 transitions. [2022-12-13 20:30:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:30:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2022-12-13 20:30:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:54,420 INFO L225 Difference]: With dead ends: 6055 [2022-12-13 20:30:54,420 INFO L226 Difference]: Without dead ends: 6025 [2022-12-13 20:30:54,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:30:54,422 INFO L413 NwaCegarLoop]: 1235 mSDtfsCounter, 1116 mSDsluCounter, 4153 mSDsCounter, 0 mSdLazyCounter, 5634 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 5388 SdHoareTripleChecker+Invalid, 5801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 5634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:54,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 5388 Invalid, 5801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 5634 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 20:30:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6025 states. [2022-12-13 20:30:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6025 to 6020. [2022-12-13 20:30:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6020 states, 4061 states have (on average 1.3740458015267176) internal successors, (5580), 4163 states have internal predecessors, (5580), 1682 states have call successors, (1682), 270 states have call predecessors, (1682), 276 states have return successors, (1700), 1654 states have call predecessors, (1700), 1672 states have call successors, (1700) [2022-12-13 20:30:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6020 states to 6020 states and 8962 transitions. [2022-12-13 20:30:54,767 INFO L78 Accepts]: Start accepts. Automaton has 6020 states and 8962 transitions. Word has length 56 [2022-12-13 20:30:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:54,768 INFO L495 AbstractCegarLoop]: Abstraction has 6020 states and 8962 transitions. [2022-12-13 20:30:54,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 20:30:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6020 states and 8962 transitions. [2022-12-13 20:30:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 20:30:54,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:54,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:54,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 20:30:54,769 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:30:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1854765641, now seen corresponding path program 1 times [2022-12-13 20:30:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222053739] [2022-12-13 20:30:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:54,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:55,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 20:30:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:30:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222053739] [2022-12-13 20:30:55,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222053739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:30:55,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:30:55,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:30:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053838188] [2022-12-13 20:30:55,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:30:55,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:30:55,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:30:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:30:55,104 INFO L87 Difference]: Start difference. First operand 6020 states and 8962 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:30:57,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:00,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:02,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:09,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:10,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:15,794 INFO L93 Difference]: Finished difference Result 6780 states and 10130 transitions. [2022-12-13 20:31:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:31:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-12-13 20:31:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:15,808 INFO L225 Difference]: With dead ends: 6780 [2022-12-13 20:31:15,808 INFO L226 Difference]: Without dead ends: 6693 [2022-12-13 20:31:15,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:31:15,810 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 3034 mSDsluCounter, 4742 mSDsCounter, 0 mSdLazyCounter, 9671 mSolverCounterSat, 1514 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3188 SdHoareTripleChecker+Valid, 5945 SdHoareTripleChecker+Invalid, 11187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1514 IncrementalHoareTripleChecker+Valid, 9671 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:15,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3188 Valid, 5945 Invalid, 11187 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1514 Valid, 9671 Invalid, 2 Unknown, 0 Unchecked, 19.9s Time] [2022-12-13 20:31:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6693 states. [2022-12-13 20:31:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6693 to 6066. [2022-12-13 20:31:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6066 states, 4097 states have (on average 1.3734439834024896) internal successors, (5627), 4200 states have internal predecessors, (5627), 1686 states have call successors, (1686), 275 states have call predecessors, (1686), 282 states have return successors, (1704), 1658 states have call predecessors, (1704), 1676 states have call successors, (1704) [2022-12-13 20:31:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 9017 transitions. [2022-12-13 20:31:16,307 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 9017 transitions. Word has length 55 [2022-12-13 20:31:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:16,307 INFO L495 AbstractCegarLoop]: Abstraction has 6066 states and 9017 transitions. [2022-12-13 20:31:16,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:31:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 9017 transitions. [2022-12-13 20:31:16,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 20:31:16,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:16,309 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:16,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 20:31:16,309 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:16,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1116807328, now seen corresponding path program 1 times [2022-12-13 20:31:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558694365] [2022-12-13 20:31:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:31:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:31:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:31:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:31:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 20:31:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558694365] [2022-12-13 20:31:16,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558694365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:16,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:16,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:31:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982734301] [2022-12-13 20:31:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:31:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:31:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:31:16,624 INFO L87 Difference]: Start difference. First operand 6066 states and 9017 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 20:31:18,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:20,773 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 [] [2022-12-13 20:31:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:26,396 INFO L93 Difference]: Finished difference Result 6933 states and 10354 transitions. [2022-12-13 20:31:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:31:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2022-12-13 20:31:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:26,409 INFO L225 Difference]: With dead ends: 6933 [2022-12-13 20:31:26,409 INFO L226 Difference]: Without dead ends: 5990 [2022-12-13 20:31:26,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:31:26,412 INFO L413 NwaCegarLoop]: 1190 mSDtfsCounter, 1771 mSDsluCounter, 5067 mSDsCounter, 0 mSdLazyCounter, 8176 mSolverCounterSat, 1018 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2088 SdHoareTripleChecker+Valid, 6257 SdHoareTripleChecker+Invalid, 9195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1018 IncrementalHoareTripleChecker+Valid, 8176 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:26,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2088 Valid, 6257 Invalid, 9195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1018 Valid, 8176 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-12-13 20:31:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2022-12-13 20:31:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5243. [2022-12-13 20:31:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 3581 states have (on average 1.373080145210835) internal successors, (4917), 3670 states have internal predecessors, (4917), 1419 states have call successors, (1419), 235 states have call predecessors, (1419), 242 states have return successors, (1437), 1396 states have call predecessors, (1437), 1409 states have call successors, (1437) [2022-12-13 20:31:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 7773 transitions. [2022-12-13 20:31:26,822 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 7773 transitions. Word has length 69 [2022-12-13 20:31:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:26,823 INFO L495 AbstractCegarLoop]: Abstraction has 5243 states and 7773 transitions. [2022-12-13 20:31:26,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 20:31:26,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 7773 transitions. [2022-12-13 20:31:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 20:31:26,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:26,824 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:26,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 20:31:26,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:26,824 INFO L85 PathProgramCache]: Analyzing trace with hash -599882155, now seen corresponding path program 1 times [2022-12-13 20:31:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:26,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603610630] [2022-12-13 20:31:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:26,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:31:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:31:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:31:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:31:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 20:31:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:31:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:27,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603610630] [2022-12-13 20:31:27,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603610630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:27,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:27,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:31:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656516410] [2022-12-13 20:31:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:31:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:27,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:31:27,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:31:27,146 INFO L87 Difference]: Start difference. First operand 5243 states and 7773 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:31:31,316 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 [] [2022-12-13 20:31:36,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:40,309 INFO L93 Difference]: Finished difference Result 6024 states and 9008 transitions. [2022-12-13 20:31:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:31:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-12-13 20:31:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:40,321 INFO L225 Difference]: With dead ends: 6024 [2022-12-13 20:31:40,321 INFO L226 Difference]: Without dead ends: 5971 [2022-12-13 20:31:40,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:31:40,323 INFO L413 NwaCegarLoop]: 1184 mSDtfsCounter, 2381 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 8604 mSolverCounterSat, 1683 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 6891 SdHoareTripleChecker+Invalid, 10288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1683 IncrementalHoareTripleChecker+Valid, 8604 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:40,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2691 Valid, 6891 Invalid, 10288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1683 Valid, 8604 Invalid, 1 Unknown, 0 Unchecked, 12.5s Time] [2022-12-13 20:31:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2022-12-13 20:31:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5230. [2022-12-13 20:31:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5230 states, 3573 states have (on average 1.373355723481668) internal successors, (4907), 3661 states have internal predecessors, (4907), 1416 states have call successors, (1416), 233 states have call predecessors, (1416), 240 states have return successors, (1434), 1394 states have call predecessors, (1434), 1406 states have call successors, (1434) [2022-12-13 20:31:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 7757 transitions. [2022-12-13 20:31:40,742 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 7757 transitions. Word has length 63 [2022-12-13 20:31:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:40,742 INFO L495 AbstractCegarLoop]: Abstraction has 5230 states and 7757 transitions. [2022-12-13 20:31:40,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:31:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 7757 transitions. [2022-12-13 20:31:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 20:31:40,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:40,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:40,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 20:31:40,744 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash 878874236, now seen corresponding path program 1 times [2022-12-13 20:31:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:40,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230857801] [2022-12-13 20:31:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:40,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 20:31:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:40,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230857801] [2022-12-13 20:31:40,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230857801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:40,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:40,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:31:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918798670] [2022-12-13 20:31:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:31:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:31:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:31:40,953 INFO L87 Difference]: Start difference. First operand 5230 states and 7757 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:31:43,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:45,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:49,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:52,336 INFO L93 Difference]: Finished difference Result 8066 states and 12047 transitions. [2022-12-13 20:31:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:31:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-12-13 20:31:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:52,348 INFO L225 Difference]: With dead ends: 8066 [2022-12-13 20:31:52,348 INFO L226 Difference]: Without dead ends: 5711 [2022-12-13 20:31:52,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:31:52,363 INFO L413 NwaCegarLoop]: 1558 mSDtfsCounter, 2667 mSDsluCounter, 3086 mSDsCounter, 0 mSdLazyCounter, 4416 mSolverCounterSat, 1134 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2824 SdHoareTripleChecker+Valid, 4644 SdHoareTripleChecker+Invalid, 5551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 4416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:52,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2824 Valid, 4644 Invalid, 5551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 4416 Invalid, 1 Unknown, 0 Unchecked, 10.7s Time] [2022-12-13 20:31:52,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2022-12-13 20:31:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 5187. [2022-12-13 20:31:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 3534 states have (on average 1.3769100169779287) internal successors, (4866), 3633 states have internal predecessors, (4866), 1415 states have call successors, (1415), 233 states have call predecessors, (1415), 237 states have return successors, (1419), 1379 states have call predecessors, (1419), 1405 states have call successors, (1419) [2022-12-13 20:31:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 7700 transitions. [2022-12-13 20:31:52,798 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 7700 transitions. Word has length 57 [2022-12-13 20:31:52,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:52,799 INFO L495 AbstractCegarLoop]: Abstraction has 5187 states and 7700 transitions. [2022-12-13 20:31:52,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:31:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 7700 transitions. [2022-12-13 20:31:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 20:31:52,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:52,800 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:52,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 20:31:52,800 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash -566194308, now seen corresponding path program 1 times [2022-12-13 20:31:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:52,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083894836] [2022-12-13 20:31:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:52,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 20:31:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:52,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:52,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083894836] [2022-12-13 20:31:52,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083894836] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:52,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:52,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:31:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134044525] [2022-12-13 20:31:52,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:52,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:31:52,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:31:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:31:52,966 INFO L87 Difference]: Start difference. First operand 5187 states and 7700 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:31:55,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:31:57,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:01,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:05,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:32:10,002 INFO L93 Difference]: Finished difference Result 6961 states and 10425 transitions. [2022-12-13 20:32:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:32:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-12-13 20:32:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:32:10,016 INFO L225 Difference]: With dead ends: 6961 [2022-12-13 20:32:10,016 INFO L226 Difference]: Without dead ends: 6948 [2022-12-13 20:32:10,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:32:10,018 INFO L413 NwaCegarLoop]: 2261 mSDtfsCounter, 2031 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 965 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2350 SdHoareTripleChecker+Valid, 4420 SdHoareTripleChecker+Invalid, 5556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:32:10,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2350 Valid, 4420 Invalid, 5556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 4588 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2022-12-13 20:32:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6948 states. [2022-12-13 20:32:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6948 to 5221. [2022-12-13 20:32:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 3562 states have (on average 1.375350926445817) internal successors, (4899), 3662 states have internal predecessors, (4899), 1417 states have call successors, (1417), 236 states have call predecessors, (1417), 241 states have return successors, (1422), 1382 states have call predecessors, (1422), 1407 states have call successors, (1422) [2022-12-13 20:32:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 7738 transitions. [2022-12-13 20:32:10,498 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 7738 transitions. Word has length 57 [2022-12-13 20:32:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:32:10,498 INFO L495 AbstractCegarLoop]: Abstraction has 5221 states and 7738 transitions. [2022-12-13 20:32:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:32:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 7738 transitions. [2022-12-13 20:32:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 20:32:10,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:32:10,500 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:32:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 20:32:10,500 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:32:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1294086456, now seen corresponding path program 1 times [2022-12-13 20:32:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:32:10,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710713789] [2022-12-13 20:32:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:32:10,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:32:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:32:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:32:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:32:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:32:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:32:10,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:32:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710713789] [2022-12-13 20:32:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710713789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:32:10,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:32:10,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:32:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983285136] [2022-12-13 20:32:10,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:32:10,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:32:10,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:32:10,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:32:10,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:32:10,828 INFO L87 Difference]: Start difference. First operand 5221 states and 7738 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:32:13,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:14,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:16,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:18,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:24,639 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 [] [2022-12-13 20:32:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:32:29,461 INFO L93 Difference]: Finished difference Result 5946 states and 8907 transitions. [2022-12-13 20:32:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:32:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-12-13 20:32:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:32:29,473 INFO L225 Difference]: With dead ends: 5946 [2022-12-13 20:32:29,473 INFO L226 Difference]: Without dead ends: 5900 [2022-12-13 20:32:29,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:32:29,475 INFO L413 NwaCegarLoop]: 1192 mSDtfsCounter, 1162 mSDsluCounter, 7724 mSDsCounter, 0 mSdLazyCounter, 11751 mSolverCounterSat, 407 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 8916 SdHoareTripleChecker+Invalid, 12161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 11751 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:32:29,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 8916 Invalid, 12161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [407 Valid, 11751 Invalid, 3 Unknown, 0 Unchecked, 17.8s Time] [2022-12-13 20:32:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5900 states. [2022-12-13 20:32:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5900 to 5214. [2022-12-13 20:32:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5214 states, 3556 states have (on average 1.3700787401574803) internal successors, (4872), 3656 states have internal predecessors, (4872), 1416 states have call successors, (1416), 236 states have call predecessors, (1416), 241 states have return successors, (1420), 1380 states have call predecessors, (1420), 1406 states have call successors, (1420) [2022-12-13 20:32:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5214 states to 5214 states and 7708 transitions. [2022-12-13 20:32:29,956 INFO L78 Accepts]: Start accepts. Automaton has 5214 states and 7708 transitions. Word has length 69 [2022-12-13 20:32:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:32:29,956 INFO L495 AbstractCegarLoop]: Abstraction has 5214 states and 7708 transitions. [2022-12-13 20:32:29,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:32:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5214 states and 7708 transitions. [2022-12-13 20:32:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 20:32:29,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:32:29,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:32:29,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 20:32:29,957 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:32:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:29,958 INFO L85 PathProgramCache]: Analyzing trace with hash 60334842, now seen corresponding path program 1 times [2022-12-13 20:32:29,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:32:29,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245993280] [2022-12-13 20:32:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:32:29,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:32:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:30,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:32:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:32:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:32:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:30,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:32:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:32:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:32:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245993280] [2022-12-13 20:32:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245993280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:32:30,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:32:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:32:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520264695] [2022-12-13 20:32:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:32:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:32:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:32:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:32:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:32:30,248 INFO L87 Difference]: Start difference. First operand 5214 states and 7708 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:32:34,514 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 [] [2022-12-13 20:32:39,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:32:43,611 INFO L93 Difference]: Finished difference Result 5928 states and 8860 transitions. [2022-12-13 20:32:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:32:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-12-13 20:32:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:32:43,623 INFO L225 Difference]: With dead ends: 5928 [2022-12-13 20:32:43,623 INFO L226 Difference]: Without dead ends: 5898 [2022-12-13 20:32:43,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:32:43,625 INFO L413 NwaCegarLoop]: 1162 mSDtfsCounter, 1153 mSDsluCounter, 7580 mSDsCounter, 0 mSdLazyCounter, 11632 mSolverCounterSat, 377 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1461 SdHoareTripleChecker+Valid, 8742 SdHoareTripleChecker+Invalid, 12010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 11632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:32:43,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1461 Valid, 8742 Invalid, 12010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 11632 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2022-12-13 20:32:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2022-12-13 20:32:44,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 5212. [2022-12-13 20:32:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 3554 states have (on average 1.370287000562746) internal successors, (4870), 3655 states have internal predecessors, (4870), 1416 states have call successors, (1416), 236 states have call predecessors, (1416), 241 states have return successors, (1419), 1379 states have call predecessors, (1419), 1406 states have call successors, (1419) [2022-12-13 20:32:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 7705 transitions. [2022-12-13 20:32:44,111 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 7705 transitions. Word has length 61 [2022-12-13 20:32:44,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:32:44,111 INFO L495 AbstractCegarLoop]: Abstraction has 5212 states and 7705 transitions. [2022-12-13 20:32:44,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:32:44,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 7705 transitions. [2022-12-13 20:32:44,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:32:44,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:32:44,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:32:44,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 20:32:44,113 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:32:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 80650238, now seen corresponding path program 1 times [2022-12-13 20:32:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:32:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810179149] [2022-12-13 20:32:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:32:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:32:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:44,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 20:32:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:32:44,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:32:44,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810179149] [2022-12-13 20:32:44,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810179149] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:32:44,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:32:44,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:32:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54780040] [2022-12-13 20:32:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:32:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:32:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:32:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:32:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:32:44,340 INFO L87 Difference]: Start difference. First operand 5212 states and 7705 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:32:46,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:48,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:53,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:32:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:32:57,770 INFO L93 Difference]: Finished difference Result 5746 states and 8561 transitions. [2022-12-13 20:32:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:32:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-12-13 20:32:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:32:57,781 INFO L225 Difference]: With dead ends: 5746 [2022-12-13 20:32:57,781 INFO L226 Difference]: Without dead ends: 5742 [2022-12-13 20:32:57,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:32:57,783 INFO L413 NwaCegarLoop]: 1557 mSDtfsCounter, 713 mSDsluCounter, 8697 mSDsCounter, 0 mSdLazyCounter, 8692 mSolverCounterSat, 349 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 10254 SdHoareTripleChecker+Invalid, 9042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 8692 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:32:57,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 10254 Invalid, 9042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 8692 Invalid, 1 Unknown, 0 Unchecked, 12.7s Time] [2022-12-13 20:32:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2022-12-13 20:32:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5233. [2022-12-13 20:32:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 3573 states have (on average 1.369717324377274) internal successors, (4894), 3675 states have internal predecessors, (4894), 1418 states have call successors, (1418), 236 states have call predecessors, (1418), 241 states have return successors, (1421), 1381 states have call predecessors, (1421), 1408 states have call successors, (1421) [2022-12-13 20:32:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 7733 transitions. [2022-12-13 20:32:58,276 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 7733 transitions. Word has length 58 [2022-12-13 20:32:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:32:58,276 INFO L495 AbstractCegarLoop]: Abstraction has 5233 states and 7733 transitions. [2022-12-13 20:32:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:32:58,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 7733 transitions. [2022-12-13 20:32:58,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:32:58,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:32:58,278 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:32:58,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 20:32:58,278 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:32:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:32:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 80373408, now seen corresponding path program 1 times [2022-12-13 20:32:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:32:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812829982] [2022-12-13 20:32:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:32:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:32:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:58,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 20:32:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:32:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:32:58,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812829982] [2022-12-13 20:32:58,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812829982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:32:58,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:32:58,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:32:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068248125] [2022-12-13 20:32:58,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:32:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:32:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:32:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:32:58,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:32:58,493 INFO L87 Difference]: Start difference. First operand 5233 states and 7733 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:33:00,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:02,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:07,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:11,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:33:17,679 INFO L93 Difference]: Finished difference Result 6960 states and 10402 transitions. [2022-12-13 20:33:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:33:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-12-13 20:33:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:33:17,693 INFO L225 Difference]: With dead ends: 6960 [2022-12-13 20:33:17,693 INFO L226 Difference]: Without dead ends: 6929 [2022-12-13 20:33:17,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:33:17,695 INFO L413 NwaCegarLoop]: 2217 mSDtfsCounter, 4935 mSDsluCounter, 2864 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 3221 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5104 SdHoareTripleChecker+Valid, 5081 SdHoareTripleChecker+Invalid, 9530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3221 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:33:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5104 Valid, 5081 Invalid, 9530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3221 Valid, 6306 Invalid, 3 Unknown, 0 Unchecked, 18.1s Time] [2022-12-13 20:33:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2022-12-13 20:33:18,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 5211. [2022-12-13 20:33:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 3554 states have (on average 1.3700056274620147) internal successors, (4869), 3655 states have internal predecessors, (4869), 1415 states have call successors, (1415), 236 states have call predecessors, (1415), 241 states have return successors, (1418), 1378 states have call predecessors, (1418), 1405 states have call successors, (1418) [2022-12-13 20:33:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 7702 transitions. [2022-12-13 20:33:18,210 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 7702 transitions. Word has length 58 [2022-12-13 20:33:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:33:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 5211 states and 7702 transitions. [2022-12-13 20:33:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:33:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 7702 transitions. [2022-12-13 20:33:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 20:33:18,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:33:18,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:33:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 20:33:18,212 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:33:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:33:18,212 INFO L85 PathProgramCache]: Analyzing trace with hash 764771348, now seen corresponding path program 1 times [2022-12-13 20:33:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:33:18,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887152730] [2022-12-13 20:33:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:33:18,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:33:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:33:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:18,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:33:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:18,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 20:33:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:18,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:33:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:33:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:33:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887152730] [2022-12-13 20:33:18,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887152730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:33:18,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:33:18,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:33:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740799834] [2022-12-13 20:33:18,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:33:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:33:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:33:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:33:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:33:18,535 INFO L87 Difference]: Start difference. First operand 5211 states and 7702 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:33:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:28,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:33:33,349 INFO L93 Difference]: Finished difference Result 5926 states and 8855 transitions. [2022-12-13 20:33:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:33:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 65 [2022-12-13 20:33:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:33:33,361 INFO L225 Difference]: With dead ends: 5926 [2022-12-13 20:33:33,361 INFO L226 Difference]: Without dead ends: 5890 [2022-12-13 20:33:33,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:33:33,362 INFO L413 NwaCegarLoop]: 1153 mSDtfsCounter, 1154 mSDsluCounter, 7507 mSDsCounter, 0 mSdLazyCounter, 11524 mSolverCounterSat, 379 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 8660 SdHoareTripleChecker+Invalid, 11904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 11524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:33:33,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 8660 Invalid, 11904 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [379 Valid, 11524 Invalid, 1 Unknown, 0 Unchecked, 13.8s Time] [2022-12-13 20:33:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2022-12-13 20:33:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5200. [2022-12-13 20:33:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5200 states, 3546 states have (on average 1.3705583756345177) internal successors, (4860), 3647 states have internal predecessors, (4860), 1414 states have call successors, (1414), 236 states have call predecessors, (1414), 239 states have return successors, (1414), 1375 states have call predecessors, (1414), 1404 states have call successors, (1414) [2022-12-13 20:33:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 7688 transitions. [2022-12-13 20:33:33,883 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 7688 transitions. Word has length 65 [2022-12-13 20:33:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:33:33,883 INFO L495 AbstractCegarLoop]: Abstraction has 5200 states and 7688 transitions. [2022-12-13 20:33:33,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:33:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 7688 transitions. [2022-12-13 20:33:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 20:33:33,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:33:33,885 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:33:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 20:33:33,885 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:33:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:33:33,885 INFO L85 PathProgramCache]: Analyzing trace with hash -853360015, now seen corresponding path program 1 times [2022-12-13 20:33:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:33:33,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577057786] [2022-12-13 20:33:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:33:33,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:33:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:34,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-12-13 20:33:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:33:34,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:33:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577057786] [2022-12-13 20:33:34,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577057786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:33:34,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:33:34,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:33:34,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654727384] [2022-12-13 20:33:34,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:33:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:33:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:33:34,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:33:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:33:34,127 INFO L87 Difference]: Start difference. First operand 5200 states and 7688 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:33:37,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:39,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:44,535 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 [] [2022-12-13 20:33:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:33:49,487 INFO L93 Difference]: Finished difference Result 5730 states and 8539 transitions. [2022-12-13 20:33:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:33:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-12-13 20:33:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:33:49,500 INFO L225 Difference]: With dead ends: 5730 [2022-12-13 20:33:49,500 INFO L226 Difference]: Without dead ends: 5690 [2022-12-13 20:33:49,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:33:49,503 INFO L413 NwaCegarLoop]: 1552 mSDtfsCounter, 706 mSDsluCounter, 8681 mSDsCounter, 0 mSdLazyCounter, 8641 mSolverCounterSat, 346 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 10233 SdHoareTripleChecker+Invalid, 8990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 8641 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:33:49,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 10233 Invalid, 8990 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [346 Valid, 8641 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2022-12-13 20:33:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2022-12-13 20:33:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 5185. [2022-12-13 20:33:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5185 states, 3532 states have (on average 1.3714609286523216) internal successors, (4844), 3633 states have internal predecessors, (4844), 1413 states have call successors, (1413), 236 states have call predecessors, (1413), 239 states have return successors, (1413), 1374 states have call predecessors, (1413), 1403 states have call successors, (1413) [2022-12-13 20:33:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7670 transitions. [2022-12-13 20:33:50,068 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7670 transitions. Word has length 59 [2022-12-13 20:33:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:33:50,068 INFO L495 AbstractCegarLoop]: Abstraction has 5185 states and 7670 transitions. [2022-12-13 20:33:50,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 7 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:33:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7670 transitions. [2022-12-13 20:33:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 20:33:50,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:33:50,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:33:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 20:33:50,070 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:33:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:33:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2133532524, now seen corresponding path program 1 times [2022-12-13 20:33:50,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:33:50,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595918444] [2022-12-13 20:33:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:33:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:33:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:33:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:50,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:33:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:33:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:33:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:33:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595918444] [2022-12-13 20:33:50,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595918444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:33:50,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:33:50,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:33:50,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822360687] [2022-12-13 20:33:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:33:50,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:33:50,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:33:50,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:33:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:33:50,226 INFO L87 Difference]: Start difference. First operand 5185 states and 7670 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-12-13 20:33:52,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:54,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:33:59,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:02,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:34:02,472 INFO L93 Difference]: Finished difference Result 5949 states and 8886 transitions. [2022-12-13 20:34:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:34:02,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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 63 [2022-12-13 20:34:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:34:02,484 INFO L225 Difference]: With dead ends: 5949 [2022-12-13 20:34:02,484 INFO L226 Difference]: Without dead ends: 5907 [2022-12-13 20:34:02,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:34:02,486 INFO L413 NwaCegarLoop]: 1459 mSDtfsCounter, 753 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 3232 mSolverCounterSat, 361 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 3246 SdHoareTripleChecker+Invalid, 3596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 3232 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:34:02,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 3246 Invalid, 3596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 3232 Invalid, 3 Unknown, 0 Unchecked, 11.4s Time] [2022-12-13 20:34:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2022-12-13 20:34:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 5186. [2022-12-13 20:34:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 3533 states have (on average 1.3713557882819134) internal successors, (4845), 3634 states have internal predecessors, (4845), 1413 states have call successors, (1413), 236 states have call predecessors, (1413), 239 states have return successors, (1413), 1374 states have call predecessors, (1413), 1403 states have call successors, (1413) [2022-12-13 20:34:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 7671 transitions. [2022-12-13 20:34:03,074 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 7671 transitions. Word has length 63 [2022-12-13 20:34:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:34:03,074 INFO L495 AbstractCegarLoop]: Abstraction has 5186 states and 7671 transitions. [2022-12-13 20:34:03,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-12-13 20:34:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 7671 transitions. [2022-12-13 20:34:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 20:34:03,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:34:03,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:34:03,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 20:34:03,076 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:34:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:34:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1734288239, now seen corresponding path program 1 times [2022-12-13 20:34:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:34:03,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792168010] [2022-12-13 20:34:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:34:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:34:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:34:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:03,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:34:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 20:34:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 20:34:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:34:03,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:34:03,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792168010] [2022-12-13 20:34:03,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792168010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:34:03,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:34:03,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:34:03,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544067810] [2022-12-13 20:34:03,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:34:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:34:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:34:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:34:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:34:03,880 INFO L87 Difference]: Start difference. First operand 5186 states and 7671 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:34:06,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:08,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:10,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:12,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:19,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:20,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:34:23,706 INFO L93 Difference]: Finished difference Result 5919 states and 8849 transitions. [2022-12-13 20:34:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:34:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-12-13 20:34:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:34:23,717 INFO L225 Difference]: With dead ends: 5919 [2022-12-13 20:34:23,717 INFO L226 Difference]: Without dead ends: 5915 [2022-12-13 20:34:23,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:34:23,719 INFO L413 NwaCegarLoop]: 1409 mSDtfsCounter, 2680 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 1167 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2857 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1167 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:34:23,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2857 Valid, 2870 Invalid, 3728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1167 Valid, 2557 Invalid, 4 Unknown, 0 Unchecked, 19.0s Time] [2022-12-13 20:34:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2022-12-13 20:34:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5184. [2022-12-13 20:34:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 3533 states have (on average 1.3707896971412397) internal successors, (4843), 3632 states have internal predecessors, (4843), 1411 states have call successors, (1411), 236 states have call predecessors, (1411), 239 states have return successors, (1413), 1374 states have call predecessors, (1413), 1403 states have call successors, (1413) [2022-12-13 20:34:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7667 transitions. [2022-12-13 20:34:24,300 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7667 transitions. Word has length 66 [2022-12-13 20:34:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:34:24,300 INFO L495 AbstractCegarLoop]: Abstraction has 5184 states and 7667 transitions. [2022-12-13 20:34:24,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:34:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7667 transitions. [2022-12-13 20:34:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 20:34:24,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:34:24,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:34:24,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-13 20:34:24,302 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:34:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:34:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1895075624, now seen corresponding path program 1 times [2022-12-13 20:34:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:34:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960718656] [2022-12-13 20:34:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:34:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:34:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:34:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:34:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 20:34:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 20:34:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 20:34:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:34:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:34:24,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960718656] [2022-12-13 20:34:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960718656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:34:24,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:34:24,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 20:34:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190195842] [2022-12-13 20:34:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:34:24,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:34:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:34:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:34:24,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:34:24,667 INFO L87 Difference]: Start difference. First operand 5184 states and 7667 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:34:28,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:35,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:34:41,307 INFO L93 Difference]: Finished difference Result 5948 states and 8889 transitions. [2022-12-13 20:34:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:34:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-12-13 20:34:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:34:41,318 INFO L225 Difference]: With dead ends: 5948 [2022-12-13 20:34:41,318 INFO L226 Difference]: Without dead ends: 5912 [2022-12-13 20:34:41,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:34:41,320 INFO L413 NwaCegarLoop]: 1092 mSDtfsCounter, 2434 mSDsluCounter, 9070 mSDsCounter, 0 mSdLazyCounter, 14757 mSolverCounterSat, 1691 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 10162 SdHoareTripleChecker+Invalid, 16450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1691 IncrementalHoareTripleChecker+Valid, 14757 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:34:41,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2746 Valid, 10162 Invalid, 16450 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1691 Valid, 14757 Invalid, 2 Unknown, 0 Unchecked, 15.5s Time] [2022-12-13 20:34:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2022-12-13 20:34:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 5191. [2022-12-13 20:34:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5191 states, 3538 states have (on average 1.3702656868287169) internal successors, (4848), 3638 states have internal predecessors, (4848), 1411 states have call successors, (1411), 236 states have call predecessors, (1411), 241 states have return successors, (1417), 1375 states have call predecessors, (1417), 1403 states have call successors, (1417) [2022-12-13 20:34:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5191 states to 5191 states and 7676 transitions. [2022-12-13 20:34:41,941 INFO L78 Accepts]: Start accepts. Automaton has 5191 states and 7676 transitions. Word has length 67 [2022-12-13 20:34:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:34:41,942 INFO L495 AbstractCegarLoop]: Abstraction has 5191 states and 7676 transitions. [2022-12-13 20:34:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 8 states have internal predecessors, (50), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:34:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5191 states and 7676 transitions. [2022-12-13 20:34:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 20:34:41,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:34:41,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:34:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-13 20:34:41,943 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:34:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:34:41,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2019148871, now seen corresponding path program 1 times [2022-12-13 20:34:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:34:41,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650742039] [2022-12-13 20:34:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:34:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:34:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 20:34:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:34:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 20:34:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 20:34:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 20:34:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:34:42,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:34:42,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650742039] [2022-12-13 20:34:42,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650742039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:34:42,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:34:42,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:34:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067718725] [2022-12-13 20:34:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:34:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:34:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:34:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:34:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:34:42,200 INFO L87 Difference]: Start difference. First operand 5191 states and 7676 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:34:45,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:47,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:34:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:34:55,811 INFO L93 Difference]: Finished difference Result 10857 states and 16200 transitions. [2022-12-13 20:34:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:34:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-12-13 20:34:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:34:55,828 INFO L225 Difference]: With dead ends: 10857 [2022-12-13 20:34:55,829 INFO L226 Difference]: Without dead ends: 5892 [2022-12-13 20:34:55,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:34:55,845 INFO L413 NwaCegarLoop]: 1084 mSDtfsCounter, 2359 mSDsluCounter, 4272 mSDsCounter, 0 mSdLazyCounter, 6889 mSolverCounterSat, 1666 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2667 SdHoareTripleChecker+Valid, 5356 SdHoareTripleChecker+Invalid, 8557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1666 IncrementalHoareTripleChecker+Valid, 6889 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:34:55,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2667 Valid, 5356 Invalid, 8557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1666 Valid, 6889 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2022-12-13 20:34:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2022-12-13 20:34:56,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5171. [2022-12-13 20:34:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 3524 states have (on average 1.3714528944381386) internal successors, (4833), 3624 states have internal predecessors, (4833), 1407 states have call successors, (1407), 235 states have call predecessors, (1407), 239 states have return successors, (1410), 1370 states have call predecessors, (1410), 1399 states have call successors, (1410) [2022-12-13 20:34:56,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 7650 transitions. [2022-12-13 20:34:56,563 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 7650 transitions. Word has length 67 [2022-12-13 20:34:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:34:56,564 INFO L495 AbstractCegarLoop]: Abstraction has 5171 states and 7650 transitions. [2022-12-13 20:34:56,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:34:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 7650 transitions. [2022-12-13 20:34:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 20:34:56,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:34:56,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:34:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-13 20:34:56,566 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:34:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:34:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2055516915, now seen corresponding path program 1 times [2022-12-13 20:34:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:34:56,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664869852] [2022-12-13 20:34:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:34:56,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:34:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:34:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:34:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:34:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:34:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-12-13 20:34:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:34:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:34:56,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:34:56,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664869852] [2022-12-13 20:34:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664869852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:34:56,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:34:56,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:34:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902428746] [2022-12-13 20:34:56,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:34:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:34:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:34:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:34:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:34:56,732 INFO L87 Difference]: Start difference. First operand 5171 states and 7650 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:34:59,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:01,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:05,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:08,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:15,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:35:15,040 INFO L93 Difference]: Finished difference Result 8594 states and 12862 transitions. [2022-12-13 20:35:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:35:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-12-13 20:35:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:35:15,058 INFO L225 Difference]: With dead ends: 8594 [2022-12-13 20:35:15,058 INFO L226 Difference]: Without dead ends: 8480 [2022-12-13 20:35:15,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:35:15,061 INFO L413 NwaCegarLoop]: 1655 mSDtfsCounter, 2964 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 5685 mSolverCounterSat, 2524 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3128 SdHoareTripleChecker+Valid, 4661 SdHoareTripleChecker+Invalid, 8211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2524 IncrementalHoareTripleChecker+Valid, 5685 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:35:15,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3128 Valid, 4661 Invalid, 8211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2524 Valid, 5685 Invalid, 2 Unknown, 0 Unchecked, 16.9s Time] [2022-12-13 20:35:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8480 states. [2022-12-13 20:35:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8480 to 6239. [2022-12-13 20:35:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6239 states, 4228 states have (on average 1.3746452223273415) internal successors, (5812), 4350 states have internal predecessors, (5812), 1724 states have call successors, (1724), 279 states have call predecessors, (1724), 286 states have return successors, (1730), 1680 states have call predecessors, (1730), 1716 states have call successors, (1730) [2022-12-13 20:35:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6239 states to 6239 states and 9266 transitions. [2022-12-13 20:35:15,955 INFO L78 Accepts]: Start accepts. Automaton has 6239 states and 9266 transitions. Word has length 72 [2022-12-13 20:35:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:35:15,955 INFO L495 AbstractCegarLoop]: Abstraction has 6239 states and 9266 transitions. [2022-12-13 20:35:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:35:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6239 states and 9266 transitions. [2022-12-13 20:35:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 20:35:15,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:35:15,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:35:15,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 20:35:15,957 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:35:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:35:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash -632323369, now seen corresponding path program 1 times [2022-12-13 20:35:15,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:35:15,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137766555] [2022-12-13 20:35:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:35:15,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:35:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:35:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:16,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:35:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:35:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:35:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137766555] [2022-12-13 20:35:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137766555] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:35:16,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:35:16,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:35:16,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118838252] [2022-12-13 20:35:16,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:35:16,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:35:16,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:35:16,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:35:16,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:35:16,142 INFO L87 Difference]: Start difference. First operand 6239 states and 9266 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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) [2022-12-13 20:35:18,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:20,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:22,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:24,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:35:33,263 INFO L93 Difference]: Finished difference Result 7186 states and 10770 transitions. [2022-12-13 20:35:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:35:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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 72 [2022-12-13 20:35:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:35:33,278 INFO L225 Difference]: With dead ends: 7186 [2022-12-13 20:35:33,278 INFO L226 Difference]: Without dead ends: 7144 [2022-12-13 20:35:33,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:35:33,280 INFO L413 NwaCegarLoop]: 1442 mSDtfsCounter, 859 mSDsluCounter, 4235 mSDsCounter, 0 mSdLazyCounter, 5723 mSolverCounterSat, 360 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 5677 SdHoareTripleChecker+Invalid, 6085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 5723 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:35:33,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 5677 Invalid, 6085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 5723 Invalid, 2 Unknown, 0 Unchecked, 15.6s Time] [2022-12-13 20:35:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2022-12-13 20:35:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 6241. [2022-12-13 20:35:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 4230 states have (on average 1.374468085106383) internal successors, (5814), 4352 states have internal predecessors, (5814), 1724 states have call successors, (1724), 279 states have call predecessors, (1724), 286 states have return successors, (1730), 1680 states have call predecessors, (1730), 1716 states have call successors, (1730) [2022-12-13 20:35:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9268 transitions. [2022-12-13 20:35:34,027 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9268 transitions. Word has length 72 [2022-12-13 20:35:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:35:34,027 INFO L495 AbstractCegarLoop]: Abstraction has 6241 states and 9268 transitions. [2022-12-13 20:35:34,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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) [2022-12-13 20:35:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9268 transitions. [2022-12-13 20:35:34,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 20:35:34,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:35:34,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:35:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-13 20:35:34,029 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:35:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:35:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1328421081, now seen corresponding path program 1 times [2022-12-13 20:35:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:35:34,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346529324] [2022-12-13 20:35:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:35:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:35:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:35:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:35:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-12-13 20:35:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 20:35:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 20:35:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:35:34,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:35:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346529324] [2022-12-13 20:35:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346529324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:35:34,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:35:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:35:34,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707807205] [2022-12-13 20:35:34,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:35:34,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:35:34,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:35:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:35:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:35:34,249 INFO L87 Difference]: Start difference. First operand 6241 states and 9268 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:35:37,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:39,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:41,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:43,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:48,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:50,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:35:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:35:58,925 INFO L93 Difference]: Finished difference Result 7949 states and 11913 transitions. [2022-12-13 20:35:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:35:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 75 [2022-12-13 20:35:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:35:58,936 INFO L225 Difference]: With dead ends: 7949 [2022-12-13 20:35:58,937 INFO L226 Difference]: Without dead ends: 5686 [2022-12-13 20:35:58,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:35:58,941 INFO L413 NwaCegarLoop]: 1638 mSDtfsCounter, 4850 mSDsluCounter, 2781 mSDsCounter, 0 mSdLazyCounter, 6648 mSolverCounterSat, 3383 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5097 SdHoareTripleChecker+Valid, 4419 SdHoareTripleChecker+Invalid, 10036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3383 IncrementalHoareTripleChecker+Valid, 6648 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:35:58,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5097 Valid, 4419 Invalid, 10036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3383 Valid, 6648 Invalid, 5 Unknown, 0 Unchecked, 23.4s Time] [2022-12-13 20:35:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2022-12-13 20:35:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4700. [2022-12-13 20:35:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4700 states, 3166 states have (on average 1.3626026531901454) internal successors, (4314), 3253 states have internal predecessors, (4314), 1307 states have call successors, (1307), 221 states have call predecessors, (1307), 226 states have return successors, (1308), 1276 states have call predecessors, (1308), 1299 states have call successors, (1308) [2022-12-13 20:35:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 6929 transitions. [2022-12-13 20:35:59,529 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 6929 transitions. Word has length 75 [2022-12-13 20:35:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:35:59,529 INFO L495 AbstractCegarLoop]: Abstraction has 4700 states and 6929 transitions. [2022-12-13 20:35:59,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:35:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 6929 transitions. [2022-12-13 20:35:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 20:35:59,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:35:59,531 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:35:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-13 20:35:59,531 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:35:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:35:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -954413907, now seen corresponding path program 1 times [2022-12-13 20:35:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:35:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725758856] [2022-12-13 20:35:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:35:59,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:35:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:59,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:35:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:59,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:35:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:35:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:35:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:35:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725758856] [2022-12-13 20:35:59,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725758856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:35:59,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:35:59,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:35:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442118645] [2022-12-13 20:35:59,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:35:59,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:35:59,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:35:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:35:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:35:59,773 INFO L87 Difference]: Start difference. First operand 4700 states and 6929 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-12-13 20:36:03,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:05,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:07,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:11,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:16,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:16,258 INFO L93 Difference]: Finished difference Result 5462 states and 8119 transitions. [2022-12-13 20:36:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:36:16,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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 73 [2022-12-13 20:36:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:16,268 INFO L225 Difference]: With dead ends: 5462 [2022-12-13 20:36:16,269 INFO L226 Difference]: Without dead ends: 5377 [2022-12-13 20:36:16,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:36:16,272 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 810 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 5712 mSolverCounterSat, 354 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 5563 SdHoareTripleChecker+Invalid, 6069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 5712 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:16,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 5563 Invalid, 6069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 5712 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2022-12-13 20:36:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2022-12-13 20:36:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4703. [2022-12-13 20:36:16,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 3169 states have (on average 1.3622593878195015) internal successors, (4317), 3256 states have internal predecessors, (4317), 1307 states have call successors, (1307), 221 states have call predecessors, (1307), 226 states have return successors, (1308), 1276 states have call predecessors, (1308), 1299 states have call successors, (1308) [2022-12-13 20:36:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6932 transitions. [2022-12-13 20:36:16,892 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6932 transitions. Word has length 73 [2022-12-13 20:36:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:16,892 INFO L495 AbstractCegarLoop]: Abstraction has 4703 states and 6932 transitions. [2022-12-13 20:36:16,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 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) [2022-12-13 20:36:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6932 transitions. [2022-12-13 20:36:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:36:16,893 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:16,894 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-13 20:36:16,894 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1392796804, now seen corresponding path program 1 times [2022-12-13 20:36:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070062056] [2022-12-13 20:36:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:36:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:36:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-12-13 20:36:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 20:36:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 20:36:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:36:17,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070062056] [2022-12-13 20:36:17,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070062056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:36:17,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:36:17,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:36:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127204958] [2022-12-13 20:36:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:36:17,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:36:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:36:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:36:17,068 INFO L87 Difference]: Start difference. First operand 4703 states and 6932 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:36:20,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:22,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:26,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:29,722 INFO L93 Difference]: Finished difference Result 7498 states and 11160 transitions. [2022-12-13 20:36:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:36:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2022-12-13 20:36:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:29,730 INFO L225 Difference]: With dead ends: 7498 [2022-12-13 20:36:29,730 INFO L226 Difference]: Without dead ends: 4144 [2022-12-13 20:36:29,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:36:29,736 INFO L413 NwaCegarLoop]: 1075 mSDtfsCounter, 3382 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 2161 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 2491 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2161 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:29,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 2491 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2161 Valid, 2882 Invalid, 1 Unknown, 0 Unchecked, 11.8s Time] [2022-12-13 20:36:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2022-12-13 20:36:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3594. [2022-12-13 20:36:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 2433 states have (on average 1.3522400328812165) internal successors, (3290), 2498 states have internal predecessors, (3290), 984 states have call successors, (984), 174 states have call predecessors, (984), 176 states have return successors, (981), 960 states have call predecessors, (981), 976 states have call successors, (981) [2022-12-13 20:36:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 5255 transitions. [2022-12-13 20:36:30,335 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 5255 transitions. Word has length 77 [2022-12-13 20:36:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:30,336 INFO L495 AbstractCegarLoop]: Abstraction has 3594 states and 5255 transitions. [2022-12-13 20:36:30,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:36:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 5255 transitions. [2022-12-13 20:36:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:36:30,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:30,339 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:30,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-13 20:36:30,339 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash 771975010, now seen corresponding path program 1 times [2022-12-13 20:36:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566255131] [2022-12-13 20:36:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:36:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:36:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:30,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 20:36:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-12-13 20:36:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:36:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:30,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566255131] [2022-12-13 20:36:30,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566255131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:36:30,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:36:30,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:36:30,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54902878] [2022-12-13 20:36:30,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:36:30,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:36:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:36:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:36:30,605 INFO L87 Difference]: Start difference. First operand 3594 states and 5255 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:36:33,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:35,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:39,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:36:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:43,981 INFO L93 Difference]: Finished difference Result 4135 states and 6113 transitions. [2022-12-13 20:36:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:36:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 77 [2022-12-13 20:36:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:43,990 INFO L225 Difference]: With dead ends: 4135 [2022-12-13 20:36:43,990 INFO L226 Difference]: Without dead ends: 3720 [2022-12-13 20:36:43,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:36:43,992 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 1185 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 6921 mSolverCounterSat, 388 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 5353 SdHoareTripleChecker+Invalid, 7311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 6921 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:43,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1499 Valid, 5353 Invalid, 7311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 6921 Invalid, 2 Unknown, 0 Unchecked, 12.6s Time] [2022-12-13 20:36:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-12-13 20:36:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3231. [2022-12-13 20:36:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 2223 states have (on average 1.352676563202879) internal successors, (3007), 2284 states have internal predecessors, (3007), 839 states have call successors, (839), 166 states have call predecessors, (839), 168 states have return successors, (836), 816 states have call predecessors, (836), 831 states have call successors, (836) [2022-12-13 20:36:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4682 transitions. [2022-12-13 20:36:44,476 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4682 transitions. Word has length 77 [2022-12-13 20:36:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:44,476 INFO L495 AbstractCegarLoop]: Abstraction has 3231 states and 4682 transitions. [2022-12-13 20:36:44,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:36:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4682 transitions. [2022-12-13 20:36:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:36:44,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:44,477 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-12-13 20:36:44,478 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1958305264, now seen corresponding path program 1 times [2022-12-13 20:36:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194273605] [2022-12-13 20:36:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:36:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:36:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:36:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:36:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 20:36:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 20:36:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:36:44,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:44,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194273605] [2022-12-13 20:36:44,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194273605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:36:44,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:36:44,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:36:44,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449240004] [2022-12-13 20:36:44,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:36:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:36:44,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:36:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:36:44,643 INFO L87 Difference]: Start difference. First operand 3231 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:36:49,179 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 [] [2022-12-13 20:36:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:52,398 INFO L93 Difference]: Finished difference Result 3762 states and 5517 transitions. [2022-12-13 20:36:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:36:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2022-12-13 20:36:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:52,406 INFO L225 Difference]: With dead ends: 3762 [2022-12-13 20:36:52,406 INFO L226 Difference]: Without dead ends: 3716 [2022-12-13 20:36:52,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:36:52,408 INFO L413 NwaCegarLoop]: 977 mSDtfsCounter, 1638 mSDsluCounter, 2044 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 1278 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 4941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1278 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:52,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 3021 Invalid, 4941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1278 Valid, 3662 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2022-12-13 20:36:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2022-12-13 20:36:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3236. [2022-12-13 20:36:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 2226 states have (on average 1.3522012578616351) internal successors, (3010), 2287 states have internal predecessors, (3010), 841 states have call successors, (841), 166 states have call predecessors, (841), 168 states have return successors, (838), 818 states have call predecessors, (838), 833 states have call successors, (838) [2022-12-13 20:36:52,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 4689 transitions. [2022-12-13 20:36:52,956 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 4689 transitions. Word has length 77 [2022-12-13 20:36:52,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:52,956 INFO L495 AbstractCegarLoop]: Abstraction has 3236 states and 4689 transitions. [2022-12-13 20:36:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:36:52,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 4689 transitions. [2022-12-13 20:36:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 20:36:52,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:52,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:52,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-12-13 20:36:52,957 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1829865540, now seen corresponding path program 1 times [2022-12-13 20:36:52,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:52,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496365950] [2022-12-13 20:36:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:52,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:53,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:36:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:53,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:36:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:53,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 20:36:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 20:36:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:36:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496365950] [2022-12-13 20:36:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496365950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:36:53,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:36:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:36:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736646646] [2022-12-13 20:36:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:36:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:36:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:36:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:36:53,120 INFO L87 Difference]: Start difference. First operand 3236 states and 4689 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:36:58,375 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 [] [2022-12-13 20:37:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:01,237 INFO L93 Difference]: Finished difference Result 3729 states and 5476 transitions. [2022-12-13 20:37:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:37:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 78 [2022-12-13 20:37:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:01,244 INFO L225 Difference]: With dead ends: 3729 [2022-12-13 20:37:01,244 INFO L226 Difference]: Without dead ends: 3677 [2022-12-13 20:37:01,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:37:01,245 INFO L413 NwaCegarLoop]: 1293 mSDtfsCounter, 1344 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 979 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 3800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:01,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1560 Valid, 3188 Invalid, 3800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 2820 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-12-13 20:37:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2022-12-13 20:37:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3204. [2022-12-13 20:37:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 2198 states have (on average 1.3498635122838945) internal successors, (2967), 2258 states have internal predecessors, (2967), 839 states have call successors, (839), 164 states have call predecessors, (839), 166 states have return successors, (836), 816 states have call predecessors, (836), 831 states have call successors, (836) [2022-12-13 20:37:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 4642 transitions. [2022-12-13 20:37:01,652 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 4642 transitions. Word has length 78 [2022-12-13 20:37:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:01,652 INFO L495 AbstractCegarLoop]: Abstraction has 3204 states and 4642 transitions. [2022-12-13 20:37:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:37:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 4642 transitions. [2022-12-13 20:37:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 20:37:01,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:01,653 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-12-13 20:37:01,654 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1852199331, now seen corresponding path program 1 times [2022-12-13 20:37:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736358008] [2022-12-13 20:37:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:37:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:37:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 20:37:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 20:37:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:37:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 20:37:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:37:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736358008] [2022-12-13 20:37:01,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736358008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:37:01,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:37:01,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:37:01,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838463677] [2022-12-13 20:37:01,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:37:01,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:37:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:37:01,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:37:01,884 INFO L87 Difference]: Start difference. First operand 3204 states and 4642 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:37:07,368 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 [] [2022-12-13 20:37:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:12,300 INFO L93 Difference]: Finished difference Result 3870 states and 5646 transitions. [2022-12-13 20:37:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:37:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 78 [2022-12-13 20:37:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:12,310 INFO L225 Difference]: With dead ends: 3870 [2022-12-13 20:37:12,310 INFO L226 Difference]: Without dead ends: 3665 [2022-12-13 20:37:12,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:37:12,312 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 1659 mSDsluCounter, 3878 mSDsCounter, 0 mSdLazyCounter, 6637 mSolverCounterSat, 1268 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 4888 SdHoareTripleChecker+Invalid, 7906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1268 IncrementalHoareTripleChecker+Valid, 6637 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:12,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 4888 Invalid, 7906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1268 Valid, 6637 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-12-13 20:37:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2022-12-13 20:37:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3194. [2022-12-13 20:37:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 2192 states have (on average 1.3499087591240877) internal successors, (2959), 2252 states have internal predecessors, (2959), 835 states have call successors, (835), 164 states have call predecessors, (835), 166 states have return successors, (832), 812 states have call predecessors, (832), 827 states have call successors, (832) [2022-12-13 20:37:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 4626 transitions. [2022-12-13 20:37:12,754 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 4626 transitions. Word has length 78 [2022-12-13 20:37:12,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:12,755 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 4626 transitions. [2022-12-13 20:37:12,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:37:12,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 4626 transitions. [2022-12-13 20:37:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:37:12,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:12,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:12,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-12-13 20:37:12,756 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -518668583, now seen corresponding path program 1 times [2022-12-13 20:37:12,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:12,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667453483] [2022-12-13 20:37:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:12,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:37:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:37:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:12,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:37:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:12,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:37:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:12,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 20:37:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:13,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-12-13 20:37:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:37:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:13,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667453483] [2022-12-13 20:37:13,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667453483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:37:13,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:37:13,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:37:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305424498] [2022-12-13 20:37:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:37:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:37:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:37:13,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:37:13,012 INFO L87 Difference]: Start difference. First operand 3194 states and 4626 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:37:19,671 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 [] [2022-12-13 20:37:21,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:37:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:26,921 INFO L93 Difference]: Finished difference Result 3915 states and 5793 transitions. [2022-12-13 20:37:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:37:26,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2022-12-13 20:37:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:26,928 INFO L225 Difference]: With dead ends: 3915 [2022-12-13 20:37:26,928 INFO L226 Difference]: Without dead ends: 3814 [2022-12-13 20:37:26,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:37:26,929 INFO L413 NwaCegarLoop]: 960 mSDtfsCounter, 1700 mSDsluCounter, 4247 mSDsCounter, 0 mSdLazyCounter, 7476 mSolverCounterSat, 1365 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 5207 SdHoareTripleChecker+Invalid, 8842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 7476 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:26,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1796 Valid, 5207 Invalid, 8842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1365 Valid, 7476 Invalid, 1 Unknown, 0 Unchecked, 12.9s Time] [2022-12-13 20:37:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2022-12-13 20:37:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3169. [2022-12-13 20:37:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3169 states, 2173 states have (on average 1.349746893695352) internal successors, (2933), 2232 states have internal predecessors, (2933), 832 states have call successors, (832), 162 states have call predecessors, (832), 163 states have return successors, (829), 809 states have call predecessors, (829), 825 states have call successors, (829) [2022-12-13 20:37:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3169 states to 3169 states and 4594 transitions. [2022-12-13 20:37:27,342 INFO L78 Accepts]: Start accepts. Automaton has 3169 states and 4594 transitions. Word has length 79 [2022-12-13 20:37:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:27,342 INFO L495 AbstractCegarLoop]: Abstraction has 3169 states and 4594 transitions. [2022-12-13 20:37:27,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:37:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3169 states and 4594 transitions. [2022-12-13 20:37:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:37:27,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:27,343 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:27,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-12-13 20:37:27,343 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1350607516, now seen corresponding path program 1 times [2022-12-13 20:37:27,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:27,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929208389] [2022-12-13 20:37:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:27,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:37:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:27,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:37:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:37:27,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:27,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929208389] [2022-12-13 20:37:27,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929208389] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:37:27,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:37:27,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:37:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869615060] [2022-12-13 20:37:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:37:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:37:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:37:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:37:27,557 INFO L87 Difference]: Start difference. First operand 3169 states and 4594 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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) [2022-12-13 20:37:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:35,006 INFO L93 Difference]: Finished difference Result 3789 states and 5540 transitions. [2022-12-13 20:37:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:37:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 77 [2022-12-13 20:37:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:35,013 INFO L225 Difference]: With dead ends: 3789 [2022-12-13 20:37:35,013 INFO L226 Difference]: Without dead ends: 3704 [2022-12-13 20:37:35,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:37:35,014 INFO L413 NwaCegarLoop]: 1311 mSDtfsCounter, 806 mSDsluCounter, 3796 mSDsCounter, 0 mSdLazyCounter, 5580 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 5107 SdHoareTripleChecker+Invalid, 5907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 5580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:35,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 5107 Invalid, 5907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 5580 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-12-13 20:37:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-12-13 20:37:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3170. [2022-12-13 20:37:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 2174 states have (on average 1.3495860165593376) internal successors, (2934), 2233 states have internal predecessors, (2934), 832 states have call successors, (832), 162 states have call predecessors, (832), 163 states have return successors, (829), 809 states have call predecessors, (829), 825 states have call successors, (829) [2022-12-13 20:37:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4595 transitions. [2022-12-13 20:37:35,460 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4595 transitions. Word has length 77 [2022-12-13 20:37:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:35,460 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4595 transitions. [2022-12-13 20:37:35,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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) [2022-12-13 20:37:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4595 transitions. [2022-12-13 20:37:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 20:37:35,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:35,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-12-13 20:37:35,462 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2140189835, now seen corresponding path program 1 times [2022-12-13 20:37:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:35,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971912321] [2022-12-13 20:37:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:37:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:37:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 20:37:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-12-13 20:37:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 20:37:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-12-13 20:37:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:37:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:35,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971912321] [2022-12-13 20:37:35,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971912321] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:37:35,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:37:35,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:37:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551594991] [2022-12-13 20:37:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:37:35,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:37:35,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:35,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:37:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:37:35,688 INFO L87 Difference]: Start difference. First operand 3170 states and 4595 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 20:37:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:43,683 INFO L93 Difference]: Finished difference Result 5847 states and 8671 transitions. [2022-12-13 20:37:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:37:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 81 [2022-12-13 20:37:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:43,693 INFO L225 Difference]: With dead ends: 5847 [2022-12-13 20:37:43,693 INFO L226 Difference]: Without dead ends: 3639 [2022-12-13 20:37:43,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:37:43,697 INFO L413 NwaCegarLoop]: 917 mSDtfsCounter, 3023 mSDsluCounter, 2643 mSDsCounter, 0 mSdLazyCounter, 3924 mSolverCounterSat, 2870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3024 SdHoareTripleChecker+Valid, 3560 SdHoareTripleChecker+Invalid, 6794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2870 IncrementalHoareTripleChecker+Valid, 3924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:43,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3024 Valid, 3560 Invalid, 6794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2870 Valid, 3924 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-13 20:37:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2022-12-13 20:37:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 3168. [2022-12-13 20:37:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 2173 states have (on average 1.3483663138518178) internal successors, (2930), 2231 states have internal predecessors, (2930), 831 states have call successors, (831), 162 states have call predecessors, (831), 163 states have return successors, (829), 809 states have call predecessors, (829), 825 states have call successors, (829) [2022-12-13 20:37:44,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 4590 transitions. [2022-12-13 20:37:44,129 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 4590 transitions. Word has length 81 [2022-12-13 20:37:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:44,129 INFO L495 AbstractCegarLoop]: Abstraction has 3168 states and 4590 transitions. [2022-12-13 20:37:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 20:37:44,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 4590 transitions. [2022-12-13 20:37:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:37:44,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:44,130 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-12-13 20:37:44,131 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2000787447, now seen corresponding path program 1 times [2022-12-13 20:37:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656086838] [2022-12-13 20:37:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:37:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:37:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:37:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:37:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:37:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 20:37:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:37:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656086838] [2022-12-13 20:37:44,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656086838] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:37:44,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:37:44,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:37:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813581893] [2022-12-13 20:37:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:37:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:37:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:37:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:37:44,327 INFO L87 Difference]: Start difference. First operand 3168 states and 4590 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:37:52,521 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 [] [2022-12-13 20:37:53,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:37:55,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:37:57,814 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 [] [2022-12-13 20:38:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:06,267 INFO L93 Difference]: Finished difference Result 5163 states and 7728 transitions. [2022-12-13 20:38:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:38:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2022-12-13 20:38:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:06,277 INFO L225 Difference]: With dead ends: 5163 [2022-12-13 20:38:06,277 INFO L226 Difference]: Without dead ends: 5155 [2022-12-13 20:38:06,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:38:06,278 INFO L413 NwaCegarLoop]: 2002 mSDtfsCounter, 2167 mSDsluCounter, 3137 mSDsCounter, 0 mSdLazyCounter, 5524 mSolverCounterSat, 1088 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 5139 SdHoareTripleChecker+Invalid, 6614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1088 IncrementalHoareTripleChecker+Valid, 5524 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:06,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2520 Valid, 5139 Invalid, 6614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1088 Valid, 5524 Invalid, 2 Unknown, 0 Unchecked, 20.5s Time] [2022-12-13 20:38:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2022-12-13 20:38:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 3194. [2022-12-13 20:38:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 2195 states have (on average 1.347608200455581) internal successors, (2958), 2254 states have internal predecessors, (2958), 833 states have call successors, (833), 164 states have call predecessors, (833), 165 states have return successors, (831), 811 states have call predecessors, (831), 827 states have call successors, (831) [2022-12-13 20:38:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 4622 transitions. [2022-12-13 20:38:06,749 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 4622 transitions. Word has length 79 [2022-12-13 20:38:06,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:06,749 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 4622 transitions. [2022-12-13 20:38:06,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:38:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 4622 transitions. [2022-12-13 20:38:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:38:06,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:06,750 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:06,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-12-13 20:38:06,750 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash 796301038, now seen corresponding path program 1 times [2022-12-13 20:38:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:06,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620251119] [2022-12-13 20:38:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:06,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:06,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 20:38:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:06,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:38:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:06,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 20:38:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:38:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620251119] [2022-12-13 20:38:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620251119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:06,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:06,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:38:06,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083612100] [2022-12-13 20:38:06,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:38:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:38:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:38:06,913 INFO L87 Difference]: Start difference. First operand 3194 states and 4622 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 20:38:11,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:38:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:13,993 INFO L93 Difference]: Finished difference Result 4955 states and 7267 transitions. [2022-12-13 20:38:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:38:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 79 [2022-12-13 20:38:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:14,001 INFO L225 Difference]: With dead ends: 4955 [2022-12-13 20:38:14,001 INFO L226 Difference]: Without dead ends: 3628 [2022-12-13 20:38:14,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:38:14,004 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 2424 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 1115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2564 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1115 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:14,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2564 Valid, 1652 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1115 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-13 20:38:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2022-12-13 20:38:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 3157. [2022-12-13 20:38:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 2175 states have (on average 1.3471264367816091) internal successors, (2930), 2234 states have internal predecessors, (2930), 819 states have call successors, (819), 161 states have call predecessors, (819), 162 states have return successors, (817), 797 states have call predecessors, (817), 813 states have call successors, (817) [2022-12-13 20:38:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 4566 transitions. [2022-12-13 20:38:14,466 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 4566 transitions. Word has length 79 [2022-12-13 20:38:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:14,467 INFO L495 AbstractCegarLoop]: Abstraction has 3157 states and 4566 transitions. [2022-12-13 20:38:14,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 20:38:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 4566 transitions. [2022-12-13 20:38:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 20:38:14,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:14,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:14,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-12-13 20:38:14,468 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:14,468 INFO L85 PathProgramCache]: Analyzing trace with hash -322449245, now seen corresponding path program 1 times [2022-12-13 20:38:14,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:14,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373963598] [2022-12-13 20:38:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:38:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:38:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 20:38:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:38:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:38:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:38:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373963598] [2022-12-13 20:38:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373963598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:14,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:14,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 20:38:14,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479279925] [2022-12-13 20:38:14,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:14,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:38:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:38:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:38:14,879 INFO L87 Difference]: Start difference. First operand 3157 states and 4566 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:38:22,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:38:23,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:38:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:31,423 INFO L93 Difference]: Finished difference Result 3829 states and 5675 transitions. [2022-12-13 20:38:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:38:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 87 [2022-12-13 20:38:31,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:31,431 INFO L225 Difference]: With dead ends: 3829 [2022-12-13 20:38:31,431 INFO L226 Difference]: Without dead ends: 3796 [2022-12-13 20:38:31,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:38:31,432 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 1208 mSDsluCounter, 11485 mSDsCounter, 0 mSdLazyCounter, 15480 mSolverCounterSat, 1336 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 12724 SdHoareTripleChecker+Invalid, 16817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1336 IncrementalHoareTripleChecker+Valid, 15480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:31,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 12724 Invalid, 16817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1336 Valid, 15480 Invalid, 1 Unknown, 0 Unchecked, 15.5s Time] [2022-12-13 20:38:31,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2022-12-13 20:38:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3151. [2022-12-13 20:38:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3151 states, 2170 states have (on average 1.347004608294931) internal successors, (2923), 2229 states have internal predecessors, (2923), 818 states have call successors, (818), 161 states have call predecessors, (818), 162 states have return successors, (816), 796 states have call predecessors, (816), 812 states have call successors, (816) [2022-12-13 20:38:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3151 states to 3151 states and 4557 transitions. [2022-12-13 20:38:31,905 INFO L78 Accepts]: Start accepts. Automaton has 3151 states and 4557 transitions. Word has length 87 [2022-12-13 20:38:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:31,905 INFO L495 AbstractCegarLoop]: Abstraction has 3151 states and 4557 transitions. [2022-12-13 20:38:31,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:38:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3151 states and 4557 transitions. [2022-12-13 20:38:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 20:38:31,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:31,907 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-12-13 20:38:31,907 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:31,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1890344577, now seen corresponding path program 1 times [2022-12-13 20:38:31,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:31,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489402576] [2022-12-13 20:38:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:31,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:38:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:38:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 20:38:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:38:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:38:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:38:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:32,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489402576] [2022-12-13 20:38:32,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489402576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:32,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:32,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 20:38:32,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133746099] [2022-12-13 20:38:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:38:32,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:38:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:38:32,325 INFO L87 Difference]: Start difference. First operand 3151 states and 4557 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:38:40,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:38:41,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:38:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:49,383 INFO L93 Difference]: Finished difference Result 3823 states and 5666 transitions. [2022-12-13 20:38:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:38:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2022-12-13 20:38:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:49,390 INFO L225 Difference]: With dead ends: 3823 [2022-12-13 20:38:49,390 INFO L226 Difference]: Without dead ends: 3792 [2022-12-13 20:38:49,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:38:49,391 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 1208 mSDsluCounter, 11173 mSDsCounter, 0 mSdLazyCounter, 15446 mSolverCounterSat, 1340 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 12381 SdHoareTripleChecker+Invalid, 16787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1340 IncrementalHoareTripleChecker+Valid, 15446 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:49,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 12381 Invalid, 16787 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1340 Valid, 15446 Invalid, 1 Unknown, 0 Unchecked, 16.0s Time] [2022-12-13 20:38:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-12-13 20:38:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3147. [2022-12-13 20:38:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 2167 states have (on average 1.3470235348407937) internal successors, (2919), 2226 states have internal predecessors, (2919), 817 states have call successors, (817), 161 states have call predecessors, (817), 162 states have return successors, (815), 795 states have call predecessors, (815), 811 states have call successors, (815) [2022-12-13 20:38:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4551 transitions. [2022-12-13 20:38:49,864 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4551 transitions. Word has length 86 [2022-12-13 20:38:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:49,864 INFO L495 AbstractCegarLoop]: Abstraction has 3147 states and 4551 transitions. [2022-12-13 20:38:49,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:38:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4551 transitions. [2022-12-13 20:38:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-12-13 20:38:49,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:49,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:49,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-12-13 20:38:49,865 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash -530688652, now seen corresponding path program 1 times [2022-12-13 20:38:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508982227] [2022-12-13 20:38:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:49,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:38:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:38:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 20:38:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:38:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:38:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:38:50,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:50,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508982227] [2022-12-13 20:38:50,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508982227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:38:50,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:38:50,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 20:38:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627761556] [2022-12-13 20:38:50,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:38:50,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:38:50,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:50,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:38:50,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:38:50,279 INFO L87 Difference]: Start difference. First operand 3147 states and 4551 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:38:58,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:39:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:39:06,338 INFO L93 Difference]: Finished difference Result 3819 states and 5660 transitions. [2022-12-13 20:39:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:39:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-12-13 20:39:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:39:06,346 INFO L225 Difference]: With dead ends: 3819 [2022-12-13 20:39:06,346 INFO L226 Difference]: Without dead ends: 3786 [2022-12-13 20:39:06,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:39:06,347 INFO L413 NwaCegarLoop]: 1202 mSDtfsCounter, 1208 mSDsluCounter, 11117 mSDsCounter, 0 mSdLazyCounter, 15433 mSolverCounterSat, 1338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 12319 SdHoareTripleChecker+Invalid, 16771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 15433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:39:06,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 12319 Invalid, 16771 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1338 Valid, 15433 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-12-13 20:39:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2022-12-13 20:39:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3141. [2022-12-13 20:39:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 2162 states have (on average 1.3469010175763183) internal successors, (2912), 2221 states have internal predecessors, (2912), 816 states have call successors, (816), 161 states have call predecessors, (816), 162 states have return successors, (814), 794 states have call predecessors, (814), 810 states have call successors, (814) [2022-12-13 20:39:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4542 transitions. [2022-12-13 20:39:06,835 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 4542 transitions. Word has length 90 [2022-12-13 20:39:06,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:39:06,835 INFO L495 AbstractCegarLoop]: Abstraction has 3141 states and 4542 transitions. [2022-12-13 20:39:06,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:39:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 4542 transitions. [2022-12-13 20:39:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 20:39:06,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:39:06,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:06,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-12-13 20:39:06,837 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:39:06,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:06,837 INFO L85 PathProgramCache]: Analyzing trace with hash 817956256, now seen corresponding path program 1 times [2022-12-13 20:39:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:39:06,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525741452] [2022-12-13 20:39:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:39:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:39:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:39:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:39:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 20:39:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:39:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:39:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:39:07,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:39:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525741452] [2022-12-13 20:39:07,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525741452] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:39:07,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:39:07,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 20:39:07,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232957546] [2022-12-13 20:39:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:39:07,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:39:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:39:07,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:39:07,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:39:07,241 INFO L87 Difference]: Start difference. First operand 3141 states and 4542 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:39:15,725 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 [] [2022-12-13 20:39:17,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:39:25,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:39:25,435 INFO L93 Difference]: Finished difference Result 3813 states and 5651 transitions. [2022-12-13 20:39:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:39:25,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2022-12-13 20:39:25,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:39:25,443 INFO L225 Difference]: With dead ends: 3813 [2022-12-13 20:39:25,443 INFO L226 Difference]: Without dead ends: 3741 [2022-12-13 20:39:25,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:39:25,444 INFO L413 NwaCegarLoop]: 1189 mSDtfsCounter, 1208 mSDsluCounter, 10989 mSDsCounter, 0 mSdLazyCounter, 15411 mSolverCounterSat, 1338 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 12178 SdHoareTripleChecker+Invalid, 16750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1338 IncrementalHoareTripleChecker+Valid, 15411 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:39:25,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 12178 Invalid, 16750 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1338 Valid, 15411 Invalid, 1 Unknown, 0 Unchecked, 17.1s Time] [2022-12-13 20:39:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-12-13 20:39:25,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3101. [2022-12-13 20:39:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 2127 states have (on average 1.3441466854724964) internal successors, (2859), 2186 states have internal predecessors, (2859), 813 states have call successors, (813), 159 states have call predecessors, (813), 160 states have return successors, (811), 791 states have call predecessors, (811), 807 states have call successors, (811) [2022-12-13 20:39:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 4483 transitions. [2022-12-13 20:39:25,914 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 4483 transitions. Word has length 86 [2022-12-13 20:39:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:39:25,914 INFO L495 AbstractCegarLoop]: Abstraction has 3101 states and 4483 transitions. [2022-12-13 20:39:25,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 10 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:39:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 4483 transitions. [2022-12-13 20:39:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 20:39:25,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:39:25,915 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-12-13 20:39:25,915 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:39:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2095625241, now seen corresponding path program 1 times [2022-12-13 20:39:25,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:39:25,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502732660] [2022-12-13 20:39:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:39:25,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:39:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:39:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:39:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 20:39:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:39:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:39:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:39:26,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:39:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502732660] [2022-12-13 20:39:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502732660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:39:26,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:39:26,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 20:39:26,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825517984] [2022-12-13 20:39:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:39:26,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:39:26,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:39:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:39:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:39:26,376 INFO L87 Difference]: Start difference. First operand 3101 states and 4483 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:39:33,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:39:34,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:39:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:39:43,333 INFO L93 Difference]: Finished difference Result 3768 states and 5586 transitions. [2022-12-13 20:39:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:39:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 87 [2022-12-13 20:39:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:39:43,340 INFO L225 Difference]: With dead ends: 3768 [2022-12-13 20:39:43,340 INFO L226 Difference]: Without dead ends: 3737 [2022-12-13 20:39:43,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:39:43,342 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 1194 mSDsluCounter, 10671 mSDsCounter, 0 mSdLazyCounter, 15268 mSolverCounterSat, 1326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 11831 SdHoareTripleChecker+Invalid, 16594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1326 IncrementalHoareTripleChecker+Valid, 15268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:39:43,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 11831 Invalid, 16594 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1326 Valid, 15268 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2022-12-13 20:39:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-12-13 20:39:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3097. [2022-12-13 20:39:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 2124 states have (on average 1.3441619585687383) internal successors, (2855), 2183 states have internal predecessors, (2855), 812 states have call successors, (812), 159 states have call predecessors, (812), 160 states have return successors, (810), 790 states have call predecessors, (810), 806 states have call successors, (810) [2022-12-13 20:39:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 4477 transitions. [2022-12-13 20:39:43,825 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 4477 transitions. Word has length 87 [2022-12-13 20:39:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:39:43,825 INFO L495 AbstractCegarLoop]: Abstraction has 3097 states and 4477 transitions. [2022-12-13 20:39:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 10 states have internal predecessors, (70), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:39:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 4477 transitions. [2022-12-13 20:39:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 20:39:43,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:39:43,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-12-13 20:39:43,826 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:39:43,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:43,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1442064111, now seen corresponding path program 1 times [2022-12-13 20:39:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:39:43,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686958365] [2022-12-13 20:39:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:39:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:39:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:39:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:39:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:39:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:39:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:39:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 20:39:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:39:44,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:39:44,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686958365] [2022-12-13 20:39:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686958365] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:39:44,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:39:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:39:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859493465] [2022-12-13 20:39:44,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:39:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:39:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:39:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:39:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:39:44,082 INFO L87 Difference]: Start difference. First operand 3097 states and 4477 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:39:52,849 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 [] [2022-12-13 20:39:56,199 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 [] [2022-12-13 20:40:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:04,724 INFO L93 Difference]: Finished difference Result 5044 states and 7546 transitions. [2022-12-13 20:40:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:40:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 80 [2022-12-13 20:40:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:04,735 INFO L225 Difference]: With dead ends: 5044 [2022-12-13 20:40:04,735 INFO L226 Difference]: Without dead ends: 5038 [2022-12-13 20:40:04,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:40:04,736 INFO L413 NwaCegarLoop]: 1855 mSDtfsCounter, 5074 mSDsluCounter, 3505 mSDsCounter, 0 mSdLazyCounter, 6764 mSolverCounterSat, 3692 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5218 SdHoareTripleChecker+Valid, 5360 SdHoareTripleChecker+Invalid, 10458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3692 IncrementalHoareTripleChecker+Valid, 6764 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:04,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5218 Valid, 5360 Invalid, 10458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3692 Valid, 6764 Invalid, 2 Unknown, 0 Unchecked, 19.1s Time] [2022-12-13 20:40:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2022-12-13 20:40:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 3097. [2022-12-13 20:40:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 2124 states have (on average 1.3436911487758945) internal successors, (2854), 2183 states have internal predecessors, (2854), 812 states have call successors, (812), 159 states have call predecessors, (812), 160 states have return successors, (810), 790 states have call predecessors, (810), 806 states have call successors, (810) [2022-12-13 20:40:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 4476 transitions. [2022-12-13 20:40:05,272 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 4476 transitions. Word has length 80 [2022-12-13 20:40:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:05,272 INFO L495 AbstractCegarLoop]: Abstraction has 3097 states and 4476 transitions. [2022-12-13 20:40:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:40:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 4476 transitions. [2022-12-13 20:40:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 20:40:05,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:05,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:05,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-12-13 20:40:05,274 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash 269708161, now seen corresponding path program 1 times [2022-12-13 20:40:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890919315] [2022-12-13 20:40:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:05,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:40:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:40:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 20:40:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:40:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:40:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:40:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:05,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890919315] [2022-12-13 20:40:05,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890919315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:05,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:05,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 20:40:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6578505] [2022-12-13 20:40:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:40:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:40:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:40:05,664 INFO L87 Difference]: Start difference. First operand 3097 states and 4476 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:40:10,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:14,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:15,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:23,826 INFO L93 Difference]: Finished difference Result 3764 states and 5579 transitions. [2022-12-13 20:40:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:40:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2022-12-13 20:40:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:23,834 INFO L225 Difference]: With dead ends: 3764 [2022-12-13 20:40:23,834 INFO L226 Difference]: Without dead ends: 3733 [2022-12-13 20:40:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-12-13 20:40:23,835 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 1222 mSDsluCounter, 11635 mSDsCounter, 0 mSdLazyCounter, 16519 mSolverCounterSat, 1326 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 12794 SdHoareTripleChecker+Invalid, 17846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1326 IncrementalHoareTripleChecker+Valid, 16519 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:23,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 12794 Invalid, 17846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1326 Valid, 16519 Invalid, 1 Unknown, 0 Unchecked, 17.0s Time] [2022-12-13 20:40:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-12-13 20:40:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3093. [2022-12-13 20:40:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 2121 states have (on average 1.3437057991513437) internal successors, (2850), 2180 states have internal predecessors, (2850), 811 states have call successors, (811), 159 states have call predecessors, (811), 160 states have return successors, (809), 789 states have call predecessors, (809), 805 states have call successors, (809) [2022-12-13 20:40:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 4470 transitions. [2022-12-13 20:40:24,338 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 4470 transitions. Word has length 86 [2022-12-13 20:40:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:24,338 INFO L495 AbstractCegarLoop]: Abstraction has 3093 states and 4470 transitions. [2022-12-13 20:40:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:40:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 4470 transitions. [2022-12-13 20:40:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 20:40:24,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:24,340 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:24,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-12-13 20:40:24,340 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 655940089, now seen corresponding path program 1 times [2022-12-13 20:40:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:24,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846122076] [2022-12-13 20:40:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:24,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:40:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:40:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 20:40:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-12-13 20:40:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 20:40:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:40:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:40:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846122076] [2022-12-13 20:40:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846122076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:24,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:24,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:40:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632007805] [2022-12-13 20:40:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:24,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:40:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:40:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:40:24,555 INFO L87 Difference]: Start difference. First operand 3093 states and 4470 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 20:40:31,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:33,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:36,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:37,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:40:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:46,829 INFO L93 Difference]: Finished difference Result 5025 states and 7524 transitions. [2022-12-13 20:40:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:40:46,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2022-12-13 20:40:46,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:46,839 INFO L225 Difference]: With dead ends: 5025 [2022-12-13 20:40:46,839 INFO L226 Difference]: Without dead ends: 5022 [2022-12-13 20:40:46,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:40:46,841 INFO L413 NwaCegarLoop]: 1182 mSDtfsCounter, 3139 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 6933 mSolverCounterSat, 2984 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3293 SdHoareTripleChecker+Valid, 4079 SdHoareTripleChecker+Invalid, 9919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2984 IncrementalHoareTripleChecker+Valid, 6933 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:46,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3293 Valid, 4079 Invalid, 9919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2984 Valid, 6933 Invalid, 2 Unknown, 0 Unchecked, 20.8s Time] [2022-12-13 20:40:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-12-13 20:40:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 3097. [2022-12-13 20:40:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3097 states, 2125 states have (on average 1.344) internal successors, (2856), 2184 states have internal predecessors, (2856), 811 states have call successors, (811), 159 states have call predecessors, (811), 160 states have return successors, (809), 789 states have call predecessors, (809), 805 states have call successors, (809) [2022-12-13 20:40:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 4476 transitions. [2022-12-13 20:40:47,402 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 4476 transitions. Word has length 82 [2022-12-13 20:40:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:47,402 INFO L495 AbstractCegarLoop]: Abstraction has 3097 states and 4476 transitions. [2022-12-13 20:40:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 20:40:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 4476 transitions. [2022-12-13 20:40:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 20:40:47,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:47,404 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:47,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-12-13 20:40:47,404 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 436898571, now seen corresponding path program 1 times [2022-12-13 20:40:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:47,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151496319] [2022-12-13 20:40:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:47,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:40:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:40:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-12-13 20:40:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:40:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 20:40:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:40:47,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:47,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151496319] [2022-12-13 20:40:47,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151496319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:47,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:47,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:40:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071543487] [2022-12-13 20:40:47,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:40:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:40:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:40:47,662 INFO L87 Difference]: Start difference. First operand 3097 states and 4476 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:40:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:54,732 INFO L93 Difference]: Finished difference Result 3592 states and 5266 transitions. [2022-12-13 20:40:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:40:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-12-13 20:40:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:54,740 INFO L225 Difference]: With dead ends: 3592 [2022-12-13 20:40:54,740 INFO L226 Difference]: Without dead ends: 3547 [2022-12-13 20:40:54,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:40:54,741 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 1794 mSDsluCounter, 4251 mSDsCounter, 0 mSdLazyCounter, 9217 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2101 SdHoareTripleChecker+Valid, 5070 SdHoareTripleChecker+Invalid, 10101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 9217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:54,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2101 Valid, 5070 Invalid, 10101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 9217 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-12-13 20:40:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-12-13 20:40:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3081. [2022-12-13 20:40:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 2114 states have (on average 1.3453169347209082) internal successors, (2844), 2173 states have internal predecessors, (2844), 808 states have call successors, (808), 157 states have call predecessors, (808), 158 states have return successors, (806), 786 states have call predecessors, (806), 802 states have call successors, (806) [2022-12-13 20:40:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4458 transitions. [2022-12-13 20:40:55,285 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4458 transitions. Word has length 80 [2022-12-13 20:40:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:55,285 INFO L495 AbstractCegarLoop]: Abstraction has 3081 states and 4458 transitions. [2022-12-13 20:40:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:40:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4458 transitions. [2022-12-13 20:40:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 20:40:55,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:55,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:55,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-12-13 20:40:55,287 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1643022099, now seen corresponding path program 1 times [2022-12-13 20:40:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:55,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442366180] [2022-12-13 20:40:55,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:55,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:40:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:40:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:40:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:40:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:40:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 20:40:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:40:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:55,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442366180] [2022-12-13 20:40:55,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442366180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:40:55,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:40:55,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:40:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347389990] [2022-12-13 20:40:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:40:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:40:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:40:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:40:55,574 INFO L87 Difference]: Start difference. First operand 3081 states and 4458 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:40:59,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:04,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:41:04,963 INFO L93 Difference]: Finished difference Result 3752 states and 5567 transitions. [2022-12-13 20:41:04,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:41:04,964 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-12-13 20:41:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:41:04,971 INFO L225 Difference]: With dead ends: 3752 [2022-12-13 20:41:04,971 INFO L226 Difference]: Without dead ends: 3748 [2022-12-13 20:41:04,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:41:04,972 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 1326 mSDsluCounter, 6970 mSDsCounter, 0 mSdLazyCounter, 8516 mSolverCounterSat, 979 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 8177 SdHoareTripleChecker+Invalid, 9495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 979 IncrementalHoareTripleChecker+Valid, 8516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:41:04,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1558 Valid, 8177 Invalid, 9495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [979 Valid, 8516 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-13 20:41:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-12-13 20:41:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3104. [2022-12-13 20:41:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 2134 states have (on average 1.344423617619494) internal successors, (2869), 2194 states have internal predecessors, (2869), 811 states have call successors, (811), 157 states have call predecessors, (811), 158 states have return successors, (809), 789 states have call predecessors, (809), 805 states have call successors, (809) [2022-12-13 20:41:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 4489 transitions. [2022-12-13 20:41:05,525 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 4489 transitions. Word has length 81 [2022-12-13 20:41:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:41:05,526 INFO L495 AbstractCegarLoop]: Abstraction has 3104 states and 4489 transitions. [2022-12-13 20:41:05,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:41:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 4489 transitions. [2022-12-13 20:41:05,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 20:41:05,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:41:05,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:05,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-12-13 20:41:05,527 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:41:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1642745269, now seen corresponding path program 1 times [2022-12-13 20:41:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663800832] [2022-12-13 20:41:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:41:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:41:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 20:41:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 20:41:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 20:41:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 20:41:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:41:05,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663800832] [2022-12-13 20:41:05,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663800832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:05,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:05,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:41:05,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228162043] [2022-12-13 20:41:05,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:05,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:41:05,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:41:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:41:05,775 INFO L87 Difference]: Start difference. First operand 3104 states and 4489 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:41:14,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:15,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:18,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:41:26,955 INFO L93 Difference]: Finished difference Result 5051 states and 7559 transitions. [2022-12-13 20:41:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:41:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2022-12-13 20:41:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:41:26,964 INFO L225 Difference]: With dead ends: 5051 [2022-12-13 20:41:26,965 INFO L226 Difference]: Without dead ends: 5009 [2022-12-13 20:41:26,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:41:26,966 INFO L413 NwaCegarLoop]: 1800 mSDtfsCounter, 4857 mSDsluCounter, 3442 mSDsCounter, 0 mSdLazyCounter, 6917 mSolverCounterSat, 3518 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5001 SdHoareTripleChecker+Valid, 5242 SdHoareTripleChecker+Invalid, 10436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3518 IncrementalHoareTripleChecker+Valid, 6917 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:41:26,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5001 Valid, 5242 Invalid, 10436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3518 Valid, 6917 Invalid, 1 Unknown, 0 Unchecked, 19.5s Time] [2022-12-13 20:41:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2022-12-13 20:41:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 3066. [2022-12-13 20:41:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 2101 states have (on average 1.3455497382198953) internal successors, (2827), 2160 states have internal predecessors, (2827), 807 states have call successors, (807), 156 states have call predecessors, (807), 157 states have return successors, (805), 785 states have call predecessors, (805), 801 states have call successors, (805) [2022-12-13 20:41:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 4439 transitions. [2022-12-13 20:41:27,556 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 4439 transitions. Word has length 81 [2022-12-13 20:41:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:41:27,556 INFO L495 AbstractCegarLoop]: Abstraction has 3066 states and 4439 transitions. [2022-12-13 20:41:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:41:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 4439 transitions. [2022-12-13 20:41:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 20:41:27,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:41:27,558 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:27,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-12-13 20:41:27,558 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:41:27,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash 182264456, now seen corresponding path program 1 times [2022-12-13 20:41:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:27,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992380301] [2022-12-13 20:41:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:41:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:41:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:27,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 20:41:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:27,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:41:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:41:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-12-13 20:41:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:41:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:28,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992380301] [2022-12-13 20:41:28,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992380301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:28,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:28,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 20:41:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886119153] [2022-12-13 20:41:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:41:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:41:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:41:28,076 INFO L87 Difference]: Start difference. First operand 3066 states and 4439 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:41:33,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:37,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:41:46,170 INFO L93 Difference]: Finished difference Result 3733 states and 5542 transitions. [2022-12-13 20:41:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:41:46,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-12-13 20:41:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:41:46,177 INFO L225 Difference]: With dead ends: 3733 [2022-12-13 20:41:46,177 INFO L226 Difference]: Without dead ends: 3704 [2022-12-13 20:41:46,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:41:46,178 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 1151 mSDsluCounter, 11211 mSDsCounter, 0 mSdLazyCounter, 16368 mSolverCounterSat, 1313 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 12326 SdHoareTripleChecker+Invalid, 17682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1313 IncrementalHoareTripleChecker+Valid, 16368 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:41:46,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 12326 Invalid, 17682 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1313 Valid, 16368 Invalid, 1 Unknown, 0 Unchecked, 16.8s Time] [2022-12-13 20:41:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-12-13 20:41:46,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3064. [2022-12-13 20:41:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2100 states have (on average 1.3452380952380953) internal successors, (2825), 2159 states have internal predecessors, (2825), 806 states have call successors, (806), 156 states have call predecessors, (806), 157 states have return successors, (804), 784 states have call predecessors, (804), 800 states have call successors, (804) [2022-12-13 20:41:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4435 transitions. [2022-12-13 20:41:46,737 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4435 transitions. Word has length 82 [2022-12-13 20:41:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:41:46,737 INFO L495 AbstractCegarLoop]: Abstraction has 3064 states and 4435 transitions. [2022-12-13 20:41:46,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 10 states have internal predecessors, (63), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:41:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4435 transitions. [2022-12-13 20:41:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 20:41:46,738 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:41:46,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:46,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-12-13 20:41:46,738 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:41:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:46,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1381130804, now seen corresponding path program 1 times [2022-12-13 20:41:46,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:46,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541435901] [2022-12-13 20:41:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:46,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:46,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:41:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:46,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 20:41:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:46,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 20:41:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:46,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-12-13 20:41:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:47,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 20:41:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:47,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 20:41:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:41:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:41:47,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:41:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541435901] [2022-12-13 20:41:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541435901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:41:47,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:41:47,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:41:47,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305311207] [2022-12-13 20:41:47,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:41:47,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:41:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:47,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:41:47,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:41:47,054 INFO L87 Difference]: Start difference. First operand 3064 states and 4435 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:41:55,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:41:57,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:42:00,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:42:02,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:42:04,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 20:42:05,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []