./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 926c219674f55200b40d9809e5b1fdaded5b761814321598aab4b2039c1325ea --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:47:51,685 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:47:51,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-10-24 12:47:51,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:47:51,757 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:47:51,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:47:51,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:47:51,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:47:51,780 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:47:51,781 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:47:51,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:47:51,782 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:47:51,783 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:47:51,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:47:51,783 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:47:51,785 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:47:51,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:47:51,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:47:51,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:47:51,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:47:51,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:47:51,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:47:51,787 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:47:51,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:47:51,788 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:47:51,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:47:51,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:47:51,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:47:51,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:47:51,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:47:51,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:47:51,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:47:51,790 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:47:51,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:47:51,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:47:51,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:47:51,791 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:47:51,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:47:51,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:47:51,791 INFO L153 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 926c219674f55200b40d9809e5b1fdaded5b761814321598aab4b2039c1325ea [2024-10-24 12:47:52,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:47:52,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:47:52,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:47:52,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:47:52,026 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:47:52,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i [2024-10-24 12:47:53,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:47:53,552 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:47:53,552 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i [2024-10-24 12:47:53,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515ba2351/6c0cdb910cd74c9a9fac548a2e70b327/FLAG38cb7c9d5 [2024-10-24 12:47:53,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515ba2351/6c0cdb910cd74c9a9fac548a2e70b327 [2024-10-24 12:47:53,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:47:53,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:47:53,756 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:47:53,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:47:53,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:47:53,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:47:53" (1/1) ... [2024-10-24 12:47:53,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1895986e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:53, skipping insertion in model container [2024-10-24 12:47:53,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:47:53" (1/1) ... [2024-10-24 12:47:53,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:47:54,053 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i[4497,4510] [2024-10-24 12:47:54,061 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i[4557,4570] [2024-10-24 12:47:54,624 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,625 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,625 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,626 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,626 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,643 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,643 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,644 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:54,645 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,133 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,133 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:47:55,227 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:47:55,241 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i[4497,4510] [2024-10-24 12:47:55,242 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_c_str_harness.i[4557,4570] [2024-10-24 12:47:55,276 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,280 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,281 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,283 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,284 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,289 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,292 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,293 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,293 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,383 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8269] [2024-10-24 12:47:55,385 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,385 WARN L1660 CHandler]: Possible shadowing of function index [2024-10-24 12:47:55,394 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8755-8766] [2024-10-24 12:47:55,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:47:55,615 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:47:55,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55 WrapperNode [2024-10-24 12:47:55,615 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:47:55,616 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:47:55,616 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:47:55,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:47:55,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,760 INFO L138 Inliner]: procedures = 679, calls = 2604, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 828 [2024-10-24 12:47:55,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:47:55,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:47:55,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:47:55,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:47:55,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,779 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,848 INFO L175 MemorySlicer]: Split 533 memory accesses to 5 slices as follows [2, 256, 31, 239, 5]. 48 percent of accesses are in the largest equivalence class. The 503 initializations are split as follows [2, 256, 4, 236, 5]. The 4 writes are split as follows [0, 0, 4, 0, 0]. [2024-10-24 12:47:55,849 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,849 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,867 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:47:55,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:47:55,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:47:55,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:47:55,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (1/1) ... [2024-10-24 12:47:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:47:55,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:47:55,921 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:47:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:47:55,958 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2024-10-24 12:47:55,959 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2024-10-24 12:47:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 12:47:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2024-10-24 12:47:55,959 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2024-10-24 12:47:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:47:55,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:47:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 12:47:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 12:47:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 12:47:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 12:47:55,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 12:47:55,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:47:55,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2024-10-24 12:47:55,961 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2024-10-24 12:47:55,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 12:47:55,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-10-24 12:47:55,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2024-10-24 12:47:55,963 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:47:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:47:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 12:47:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 12:47:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 12:47:56,203 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:47:56,205 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:47:56,772 INFO L? ?]: Removed 76 outVars from TransFormulas that were not future-live. [2024-10-24 12:47:56,773 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:47:56,859 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:47:56,860 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-24 12:47:56,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:47:56 BoogieIcfgContainer [2024-10-24 12:47:56,860 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:47:56,862 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:47:56,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:47:56,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:47:56,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:47:53" (1/3) ... [2024-10-24 12:47:56,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27565cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:47:56, skipping insertion in model container [2024-10-24 12:47:56,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:47:55" (2/3) ... [2024-10-24 12:47:56,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27565cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:47:56, skipping insertion in model container [2024-10-24 12:47:56,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:47:56" (3/3) ... [2024-10-24 12:47:56,868 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_from_c_str_harness.i [2024-10-24 12:47:56,881 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:47:56,881 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:47:56,933 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:47:56,938 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4e2f9253, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:47:56,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 12:47:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-10-24 12:47:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 12:47:56,948 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:47:56,948 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:47:56,949 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:47:56,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:47:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1151303967, now seen corresponding path program 1 times [2024-10-24 12:47:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:47:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477967592] [2024-10-24 12:47:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:47:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:47:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:57,652 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:47:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:57,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:47:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:47:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:47:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477967592] [2024-10-24 12:47:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477967592] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:47:57,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:47:57,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:47:57,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457015333] [2024-10-24 12:47:57,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:47:57,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:47:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:47:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:47:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:47:57,769 INFO L87 Difference]: Start difference. First operand has 77 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:47:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:47:57,876 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2024-10-24 12:47:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:47:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 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 15 [2024-10-24 12:47:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:47:57,886 INFO L225 Difference]: With dead ends: 148 [2024-10-24 12:47:57,887 INFO L226 Difference]: Without dead ends: 74 [2024-10-24 12:47:57,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:47:57,894 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:47:57,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 263 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:47:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-24 12:47:57,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-24 12:47:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-10-24 12:47:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2024-10-24 12:47:57,938 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 15 [2024-10-24 12:47:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:47:57,939 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2024-10-24 12:47:57,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:47:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2024-10-24 12:47:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 12:47:57,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:47:57,941 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:47:57,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:47:57,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:47:57,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:47:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1575688462, now seen corresponding path program 1 times [2024-10-24 12:47:57,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:47:57,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484692623] [2024-10-24 12:47:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:47:57,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:47:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:47:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:47:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:47:58,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:47:58,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484692623] [2024-10-24 12:47:58,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484692623] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:47:58,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:47:58,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:47:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755893692] [2024-10-24 12:47:58,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:47:58,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:47:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:47:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:47:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:47:58,244 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:47:58,314 INFO L93 Difference]: Finished difference Result 133 states and 174 transitions. [2024-10-24 12:47:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:47:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 21 [2024-10-24 12:47:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:47:58,316 INFO L225 Difference]: With dead ends: 133 [2024-10-24 12:47:58,317 INFO L226 Difference]: Without dead ends: 77 [2024-10-24 12:47:58,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:47:58,319 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 1 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:47:58,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 248 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:47:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-24 12:47:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-10-24 12:47:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 51 states have internal predecessors, (59), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-10-24 12:47:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2024-10-24 12:47:58,328 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 21 [2024-10-24 12:47:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:47:58,329 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2024-10-24 12:47:58,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2024-10-24 12:47:58,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 12:47:58,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:47:58,332 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:47:58,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:47:58,333 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:47:58,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:47:58,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1968715472, now seen corresponding path program 1 times [2024-10-24 12:47:58,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:47:58,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263886746] [2024-10-24 12:47:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:47:58,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:47:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,521 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:47:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:47:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:47:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:47:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263886746] [2024-10-24 12:47:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263886746] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:47:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:47:58,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:47:58,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111505334] [2024-10-24 12:47:58,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:47:58,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:47:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:47:58,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:47:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:47:58,580 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:47:58,649 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2024-10-24 12:47:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:47:58,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 21 [2024-10-24 12:47:58,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:47:58,653 INFO L225 Difference]: With dead ends: 136 [2024-10-24 12:47:58,653 INFO L226 Difference]: Without dead ends: 78 [2024-10-24 12:47:58,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:47:58,654 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 0 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:47:58,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 249 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:47:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-24 12:47:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-10-24 12:47:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.22) internal successors, (61), 53 states have internal predecessors, (61), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-10-24 12:47:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2024-10-24 12:47:58,669 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 21 [2024-10-24 12:47:58,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:47:58,669 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2024-10-24 12:47:58,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2024-10-24 12:47:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 12:47:58,670 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:47:58,670 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:47:58,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:47:58,670 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:47:58,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:47:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1833853900, now seen corresponding path program 1 times [2024-10-24 12:47:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:47:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498578752] [2024-10-24 12:47:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:47:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:47:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:59,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:47:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:59,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:47:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:47:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:47:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:47:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498578752] [2024-10-24 12:47:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498578752] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:47:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:47:59,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:47:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926469791] [2024-10-24 12:47:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:47:59,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:47:59,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:47:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:47:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:47:59,444 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:47:59,559 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2024-10-24 12:47:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:47:59,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 21 [2024-10-24 12:47:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:47:59,561 INFO L225 Difference]: With dead ends: 89 [2024-10-24 12:47:59,561 INFO L226 Difference]: Without dead ends: 87 [2024-10-24 12:47:59,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:47:59,565 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 3 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:47:59,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 571 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:47:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-10-24 12:47:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-10-24 12:47:59,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.2) internal successors, (66), 59 states have internal predecessors, (66), 21 states have call successors, (21), 7 states have call predecessors, (21), 9 states have return successors, (22), 19 states have call predecessors, (22), 19 states have call successors, (22) [2024-10-24 12:47:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2024-10-24 12:47:59,576 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 21 [2024-10-24 12:47:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:47:59,576 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2024-10-24 12:47:59,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:47:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2024-10-24 12:47:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 12:47:59,577 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:47:59,578 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:47:59,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:47:59,578 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:47:59,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:47:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash -23957528, now seen corresponding path program 1 times [2024-10-24 12:47:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:47:59,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437992248] [2024-10-24 12:47:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:47:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:47:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:00,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:00,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:00,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:00,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437992248] [2024-10-24 12:48:00,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437992248] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:00,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:00,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:00,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932383615] [2024-10-24 12:48:00,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:00,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:00,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:00,633 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:00,834 INFO L93 Difference]: Finished difference Result 165 states and 213 transitions. [2024-10-24 12:48:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 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 25 [2024-10-24 12:48:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:00,836 INFO L225 Difference]: With dead ends: 165 [2024-10-24 12:48:00,836 INFO L226 Difference]: Without dead ends: 102 [2024-10-24 12:48:00,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:48:00,837 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 18 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:00,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 412 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-24 12:48:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2024-10-24 12:48:00,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 67 states have internal predecessors, (73), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2024-10-24 12:48:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2024-10-24 12:48:00,846 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 25 [2024-10-24 12:48:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:00,846 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2024-10-24 12:48:00,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2024-10-24 12:48:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 12:48:00,847 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:00,847 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:00,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:48:00,847 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:00,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash 677107050, now seen corresponding path program 1 times [2024-10-24 12:48:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:00,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999650029] [2024-10-24 12:48:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:00,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:01,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:01,229 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999650029] [2024-10-24 12:48:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999650029] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:48:01,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936457458] [2024-10-24 12:48:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:01,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:48:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:48:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:48:01,335 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:48:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:01,456 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2024-10-24 12:48:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:48:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 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 25 [2024-10-24 12:48:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:01,457 INFO L225 Difference]: With dead ends: 178 [2024-10-24 12:48:01,458 INFO L226 Difference]: Without dead ends: 109 [2024-10-24 12:48:01,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:48:01,459 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 10 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:01,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 309 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-24 12:48:01,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2024-10-24 12:48:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.1875) internal successors, (76), 70 states have internal predecessors, (76), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2024-10-24 12:48:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2024-10-24 12:48:01,468 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 25 [2024-10-24 12:48:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:01,468 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2024-10-24 12:48:01,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:48:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2024-10-24 12:48:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 12:48:01,470 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:01,470 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:01,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:48:01,470 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:01,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1585674642, now seen corresponding path program 1 times [2024-10-24 12:48:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216833467] [2024-10-24 12:48:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:02,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:02,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:02,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216833467] [2024-10-24 12:48:02,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216833467] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173810091] [2024-10-24 12:48:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:02,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:02,968 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:03,157 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2024-10-24 12:48:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:48:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 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 25 [2024-10-24 12:48:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:03,158 INFO L225 Difference]: With dead ends: 197 [2024-10-24 12:48:03,159 INFO L226 Difference]: Without dead ends: 125 [2024-10-24 12:48:03,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:03,159 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 45 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:03,159 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 388 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:03,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-24 12:48:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2024-10-24 12:48:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 75 states have internal predecessors, (84), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2024-10-24 12:48:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2024-10-24 12:48:03,173 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 25 [2024-10-24 12:48:03,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:03,173 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2024-10-24 12:48:03,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2024-10-24 12:48:03,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 12:48:03,174 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:03,174 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:03,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 12:48:03,174 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:03,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1698175404, now seen corresponding path program 1 times [2024-10-24 12:48:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:03,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830675171] [2024-10-24 12:48:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:03,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:03,933 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:03,938 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:04,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830675171] [2024-10-24 12:48:04,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830675171] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:04,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:04,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 12:48:04,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924008525] [2024-10-24 12:48:04,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:04,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:48:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:04,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:48:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:04,077 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:04,257 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2024-10-24 12:48:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:48:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 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 25 [2024-10-24 12:48:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:04,260 INFO L225 Difference]: With dead ends: 209 [2024-10-24 12:48:04,260 INFO L226 Difference]: Without dead ends: 132 [2024-10-24 12:48:04,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:04,262 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:04,262 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 472 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-24 12:48:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2024-10-24 12:48:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (26), 19 states have call predecessors, (26), 20 states have call successors, (26) [2024-10-24 12:48:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2024-10-24 12:48:04,276 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 25 [2024-10-24 12:48:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:04,276 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2024-10-24 12:48:04,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2024-10-24 12:48:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 12:48:04,277 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:04,277 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:04,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 12:48:04,277 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:04,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash 616269251, now seen corresponding path program 1 times [2024-10-24 12:48:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230726337] [2024-10-24 12:48:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:04,813 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:04,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:04,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230726337] [2024-10-24 12:48:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230726337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 12:48:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356969515] [2024-10-24 12:48:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:04,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:48:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:48:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:04,895 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:48:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:05,036 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2024-10-24 12:48:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:48:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 27 [2024-10-24 12:48:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:05,037 INFO L225 Difference]: With dead ends: 117 [2024-10-24 12:48:05,037 INFO L226 Difference]: Without dead ends: 115 [2024-10-24 12:48:05,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:48:05,041 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 3 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:05,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 723 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-24 12:48:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-10-24 12:48:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 79 states have internal predecessors, (85), 22 states have call successors, (22), 7 states have call predecessors, (22), 11 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2024-10-24 12:48:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2024-10-24 12:48:05,048 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 27 [2024-10-24 12:48:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:05,048 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2024-10-24 12:48:05,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-24 12:48:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2024-10-24 12:48:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 12:48:05,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:05,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:05,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 12:48:05,049 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:05,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 223242241, now seen corresponding path program 1 times [2024-10-24 12:48:05,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:05,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853922268] [2024-10-24 12:48:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:05,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:05,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:05,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:48:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853922268] [2024-10-24 12:48:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853922268] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 12:48:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333801560] [2024-10-24 12:48:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:05,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:48:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:48:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:48:05,876 INFO L87 Difference]: Start difference. First operand 106 states and 135 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:06,021 INFO L93 Difference]: Finished difference Result 193 states and 242 transitions. [2024-10-24 12:48:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:48:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 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 27 [2024-10-24 12:48:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:06,024 INFO L225 Difference]: With dead ends: 193 [2024-10-24 12:48:06,024 INFO L226 Difference]: Without dead ends: 112 [2024-10-24 12:48:06,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:48:06,025 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 12 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:06,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 366 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-24 12:48:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2024-10-24 12:48:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 74 states have internal predecessors, (81), 22 states have call successors, (22), 7 states have call predecessors, (22), 10 states have return successors, (25), 19 states have call predecessors, (25), 20 states have call successors, (25) [2024-10-24 12:48:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2024-10-24 12:48:06,040 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 27 [2024-10-24 12:48:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:06,040 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2024-10-24 12:48:06,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-24 12:48:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2024-10-24 12:48:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 12:48:06,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:06,041 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:06,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 12:48:06,042 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:06,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 642004233, now seen corresponding path program 1 times [2024-10-24 12:48:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:06,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665659856] [2024-10-24 12:48:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,267 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,282 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:48:06,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665659856] [2024-10-24 12:48:06,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665659856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:06,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:06,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:48:06,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071977859] [2024-10-24 12:48:06,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:06,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:48:06,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:48:06,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:48:06,322 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 12:48:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:06,387 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2024-10-24 12:48:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:48:06,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 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 32 [2024-10-24 12:48:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:06,388 INFO L225 Difference]: With dead ends: 136 [2024-10-24 12:48:06,389 INFO L226 Difference]: Without dead ends: 99 [2024-10-24 12:48:06,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:48:06,389 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 14 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:06,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 285 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-24 12:48:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-10-24 12:48:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 72 states have internal predecessors, (79), 22 states have call successors, (22), 7 states have call predecessors, (22), 9 states have return successors, (24), 19 states have call predecessors, (24), 20 states have call successors, (24) [2024-10-24 12:48:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2024-10-24 12:48:06,398 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 32 [2024-10-24 12:48:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:06,399 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2024-10-24 12:48:06,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 12:48:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2024-10-24 12:48:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 12:48:06,400 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:06,400 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:06,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 12:48:06,400 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:06,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -625485666, now seen corresponding path program 1 times [2024-10-24 12:48:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936836265] [2024-10-24 12:48:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,858 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,863 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:48:06,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:06,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936836265] [2024-10-24 12:48:06,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936836265] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:06,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:06,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:06,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217302281] [2024-10-24 12:48:06,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:06,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:06,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:06,919 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 12:48:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:07,016 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2024-10-24 12:48:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2024-10-24 12:48:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:07,019 INFO L225 Difference]: With dead ends: 110 [2024-10-24 12:48:07,019 INFO L226 Difference]: Without dead ends: 108 [2024-10-24 12:48:07,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:07,020 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 3 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:07,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 574 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-24 12:48:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2024-10-24 12:48:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 78 states have internal predecessors, (84), 23 states have call successors, (23), 8 states have call predecessors, (23), 11 states have return successors, (28), 20 states have call predecessors, (28), 21 states have call successors, (28) [2024-10-24 12:48:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2024-10-24 12:48:07,027 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 38 [2024-10-24 12:48:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:07,028 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2024-10-24 12:48:07,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 12:48:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2024-10-24 12:48:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 12:48:07,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:07,030 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:07,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-24 12:48:07,030 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:07,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 915679058, now seen corresponding path program 1 times [2024-10-24 12:48:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:07,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908498251] [2024-10-24 12:48:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:07,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:07,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:07,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:07,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:07,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:48:07,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:07,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908498251] [2024-10-24 12:48:07,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908498251] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:07,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:07,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 12:48:07,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442727660] [2024-10-24 12:48:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:07,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:48:07,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:07,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:48:07,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:07,996 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:08,274 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2024-10-24 12:48:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:48:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-10-24 12:48:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:08,276 INFO L225 Difference]: With dead ends: 171 [2024-10-24 12:48:08,276 INFO L226 Difference]: Without dead ends: 136 [2024-10-24 12:48:08,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:48:08,278 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:08,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 452 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-24 12:48:08,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2024-10-24 12:48:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 85 states have internal predecessors, (91), 25 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (35), 22 states have call predecessors, (35), 23 states have call successors, (35) [2024-10-24 12:48:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 151 transitions. [2024-10-24 12:48:08,291 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 151 transitions. Word has length 42 [2024-10-24 12:48:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:08,291 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 151 transitions. [2024-10-24 12:48:08,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 151 transitions. [2024-10-24 12:48:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 12:48:08,293 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:08,293 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:08,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 12:48:08,293 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:08,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash -646038056, now seen corresponding path program 1 times [2024-10-24 12:48:08,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:08,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140294847] [2024-10-24 12:48:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:09,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:09,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:09,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:09,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:48:09,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:09,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140294847] [2024-10-24 12:48:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140294847] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:09,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:09,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 12:48:09,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054844907] [2024-10-24 12:48:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:09,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:48:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:48:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:09,714 INFO L87 Difference]: Start difference. First operand 116 states and 151 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:10,022 INFO L93 Difference]: Finished difference Result 195 states and 260 transitions. [2024-10-24 12:48:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:48:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-10-24 12:48:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:10,024 INFO L225 Difference]: With dead ends: 195 [2024-10-24 12:48:10,024 INFO L226 Difference]: Without dead ends: 160 [2024-10-24 12:48:10,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:10,025 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 52 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:10,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 434 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 12:48:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-24 12:48:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 126. [2024-10-24 12:48:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 95 states have internal predecessors, (103), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 22 states have call predecessors, (37), 23 states have call successors, (37) [2024-10-24 12:48:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 165 transitions. [2024-10-24 12:48:10,042 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 165 transitions. Word has length 42 [2024-10-24 12:48:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:10,043 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 165 transitions. [2024-10-24 12:48:10,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 165 transitions. [2024-10-24 12:48:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 12:48:10,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:10,044 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:10,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 12:48:10,044 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:10,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1657155306, now seen corresponding path program 1 times [2024-10-24 12:48:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:10,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777258457] [2024-10-24 12:48:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:10,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:10,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:10,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:10,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:10,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:48:11,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:11,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777258457] [2024-10-24 12:48:11,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777258457] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:11,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:11,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 12:48:11,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513996491] [2024-10-24 12:48:11,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:11,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:48:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:48:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:11,052 INFO L87 Difference]: Start difference. First operand 126 states and 165 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:11,319 INFO L93 Difference]: Finished difference Result 194 states and 256 transitions. [2024-10-24 12:48:11,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:48:11,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-10-24 12:48:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:11,320 INFO L225 Difference]: With dead ends: 194 [2024-10-24 12:48:11,320 INFO L226 Difference]: Without dead ends: 159 [2024-10-24 12:48:11,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:11,321 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 39 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:11,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 468 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-10-24 12:48:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 115. [2024-10-24 12:48:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 77 states have (on average 1.155844155844156) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (34), 22 states have call predecessors, (34), 23 states have call successors, (34) [2024-10-24 12:48:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 148 transitions. [2024-10-24 12:48:11,333 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 148 transitions. Word has length 42 [2024-10-24 12:48:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:11,334 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 148 transitions. [2024-10-24 12:48:11,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 148 transitions. [2024-10-24 12:48:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 12:48:11,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:11,335 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:11,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-24 12:48:11,335 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:11,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1802587831, now seen corresponding path program 1 times [2024-10-24 12:48:11,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:11,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265024841] [2024-10-24 12:48:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:11,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,895 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,912 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,920 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 12:48:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-24 12:48:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:11,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265024841] [2024-10-24 12:48:11,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265024841] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:11,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:11,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-24 12:48:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906562682] [2024-10-24 12:48:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:11,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 12:48:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:11,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 12:48:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:48:11,933 INFO L87 Difference]: Start difference. First operand 115 states and 148 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 12:48:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:12,093 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2024-10-24 12:48:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:48:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2024-10-24 12:48:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:12,094 INFO L225 Difference]: With dead ends: 121 [2024-10-24 12:48:12,095 INFO L226 Difference]: Without dead ends: 119 [2024-10-24 12:48:12,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:12,096 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 12 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:12,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 415 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-24 12:48:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-10-24 12:48:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 80 states have (on average 1.15) internal successors, (92), 87 states have internal predecessors, (92), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (34), 22 states have call predecessors, (34), 23 states have call successors, (34) [2024-10-24 12:48:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2024-10-24 12:48:12,108 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 44 [2024-10-24 12:48:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:12,108 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2024-10-24 12:48:12,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 12:48:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2024-10-24 12:48:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 12:48:12,109 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:12,109 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:12,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-24 12:48:12,109 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:12,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1996821843, now seen corresponding path program 1 times [2024-10-24 12:48:12,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015434194] [2024-10-24 12:48:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:12,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:12,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:12,592 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:12,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 12:48:12,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:12,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015434194] [2024-10-24 12:48:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015434194] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:12,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:12,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 12:48:12,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917737085] [2024-10-24 12:48:12,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:12,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:48:12,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:48:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:12,658 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 12:48:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:12,780 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-10-24 12:48:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:48:12,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-10-24 12:48:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:12,781 INFO L225 Difference]: With dead ends: 127 [2024-10-24 12:48:12,781 INFO L226 Difference]: Without dead ends: 125 [2024-10-24 12:48:12,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:48:12,782 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 3 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:12,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 728 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-24 12:48:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 116. [2024-10-24 12:48:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 84 states have internal predecessors, (90), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (30), 22 states have call predecessors, (30), 23 states have call successors, (30) [2024-10-24 12:48:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2024-10-24 12:48:12,789 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 44 [2024-10-24 12:48:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:12,790 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2024-10-24 12:48:12,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-10-24 12:48:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2024-10-24 12:48:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 12:48:12,790 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:12,791 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:12,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-24 12:48:12,791 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:12,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:12,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1905118443, now seen corresponding path program 1 times [2024-10-24 12:48:12,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:12,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159982676] [2024-10-24 12:48:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:13,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:13,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:13,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:13,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:48:13,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159982676] [2024-10-24 12:48:13,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159982676] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:13,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:13,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371076123] [2024-10-24 12:48:13,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:13,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:13,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:13,760 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:13,942 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2024-10-24 12:48:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:13,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2024-10-24 12:48:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:13,944 INFO L225 Difference]: With dead ends: 174 [2024-10-24 12:48:13,944 INFO L226 Difference]: Without dead ends: 135 [2024-10-24 12:48:13,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:13,945 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 20 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:13,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 371 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-24 12:48:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2024-10-24 12:48:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.162162162162162) internal successors, (86), 79 states have internal predecessors, (86), 25 states have call successors, (25), 9 states have call predecessors, (25), 11 states have return successors, (27), 22 states have call predecessors, (27), 23 states have call successors, (27) [2024-10-24 12:48:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2024-10-24 12:48:13,953 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 44 [2024-10-24 12:48:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:13,954 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2024-10-24 12:48:13,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-24 12:48:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2024-10-24 12:48:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 12:48:13,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:13,954 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:13,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-24 12:48:13,955 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:13,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:13,955 INFO L85 PathProgramCache]: Analyzing trace with hash 443881659, now seen corresponding path program 1 times [2024-10-24 12:48:13,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:13,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44474863] [2024-10-24 12:48:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:13,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,357 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44474863] [2024-10-24 12:48:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44474863] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:15,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117103572] [2024-10-24 12:48:15,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:15,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:15,540 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:15,914 INFO L93 Difference]: Finished difference Result 204 states and 250 transitions. [2024-10-24 12:48:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2024-10-24 12:48:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:15,915 INFO L225 Difference]: With dead ends: 204 [2024-10-24 12:48:15,916 INFO L226 Difference]: Without dead ends: 121 [2024-10-24 12:48:15,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-24 12:48:15,917 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:15,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 242 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 12:48:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-24 12:48:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2024-10-24 12:48:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 85 states have internal predecessors, (92), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (28), 22 states have call predecessors, (28), 23 states have call successors, (28) [2024-10-24 12:48:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2024-10-24 12:48:15,928 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 50 [2024-10-24 12:48:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:15,929 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2024-10-24 12:48:15,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2024-10-24 12:48:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 12:48:15,929 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:15,929 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:15,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-24 12:48:15,930 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:15,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1117835455, now seen corresponding path program 1 times [2024-10-24 12:48:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062004478] [2024-10-24 12:48:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:15,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:17,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,253 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,263 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062004478] [2024-10-24 12:48:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062004478] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:17,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 12:48:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313645938] [2024-10-24 12:48:17,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:17,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:48:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:48:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:17,537 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:18,100 INFO L93 Difference]: Finished difference Result 241 states and 294 transitions. [2024-10-24 12:48:18,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 12:48:18,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2024-10-24 12:48:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:18,101 INFO L225 Difference]: With dead ends: 241 [2024-10-24 12:48:18,101 INFO L226 Difference]: Without dead ends: 147 [2024-10-24 12:48:18,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2024-10-24 12:48:18,102 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:18,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 268 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 12:48:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-10-24 12:48:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2024-10-24 12:48:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.1818181818181819) internal successors, (104), 95 states have internal predecessors, (104), 25 states have call successors, (25), 9 states have call predecessors, (25), 13 states have return successors, (29), 22 states have call predecessors, (29), 23 states have call successors, (29) [2024-10-24 12:48:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2024-10-24 12:48:18,112 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 50 [2024-10-24 12:48:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:18,112 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2024-10-24 12:48:18,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2024-10-24 12:48:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 12:48:18,113 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:18,113 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:18,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-24 12:48:18,114 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:18,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2128952705, now seen corresponding path program 1 times [2024-10-24 12:48:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449232303] [2024-10-24 12:48:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:18,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,409 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,420 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:19,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:19,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449232303] [2024-10-24 12:48:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449232303] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:19,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 12:48:19,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448757227] [2024-10-24 12:48:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:19,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 12:48:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 12:48:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:19,716 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:20,204 INFO L93 Difference]: Finished difference Result 253 states and 306 transitions. [2024-10-24 12:48:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 12:48:20,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2024-10-24 12:48:20,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:20,205 INFO L225 Difference]: With dead ends: 253 [2024-10-24 12:48:20,205 INFO L226 Difference]: Without dead ends: 149 [2024-10-24 12:48:20,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-10-24 12:48:20,206 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 96 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:20,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 242 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 12:48:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-24 12:48:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2024-10-24 12:48:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 84 states have internal predecessors, (90), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (27), 22 states have call predecessors, (27), 23 states have call successors, (27) [2024-10-24 12:48:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2024-10-24 12:48:20,215 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 50 [2024-10-24 12:48:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:20,215 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2024-10-24 12:48:20,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-24 12:48:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2024-10-24 12:48:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-24 12:48:20,216 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:20,216 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:20,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-24 12:48:20,216 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:20,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash 954718199, now seen corresponding path program 1 times [2024-10-24 12:48:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623293448] [2024-10-24 12:48:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,718 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 12:48:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-24 12:48:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-24 12:48:20,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:20,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623293448] [2024-10-24 12:48:20,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623293448] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:20,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:20,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 12:48:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366939601] [2024-10-24 12:48:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:20,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:48:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:48:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:48:20,752 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 12:48:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:20,884 INFO L93 Difference]: Finished difference Result 150 states and 184 transitions. [2024-10-24 12:48:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:48:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 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 51 [2024-10-24 12:48:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:20,885 INFO L225 Difference]: With dead ends: 150 [2024-10-24 12:48:20,885 INFO L226 Difference]: Without dead ends: 127 [2024-10-24 12:48:20,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:48:20,886 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:20,886 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 370 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-24 12:48:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2024-10-24 12:48:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 86 states have internal predecessors, (93), 27 states have call successors, (27), 9 states have call predecessors, (27), 12 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2024-10-24 12:48:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2024-10-24 12:48:20,894 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 51 [2024-10-24 12:48:20,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:20,894 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2024-10-24 12:48:20,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 12:48:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2024-10-24 12:48:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-24 12:48:20,895 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:20,895 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:20,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-24 12:48:20,895 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:20,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1154865132, now seen corresponding path program 1 times [2024-10-24 12:48:20,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:20,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677374505] [2024-10-24 12:48:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:20,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,587 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,591 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,624 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677374505] [2024-10-24 12:48:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677374505] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:22,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2024-10-24 12:48:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279906855] [2024-10-24 12:48:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:22,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:48:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:48:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:48:22,950 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 12:48:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:23,814 INFO L93 Difference]: Finished difference Result 132 states and 159 transitions. [2024-10-24 12:48:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 12:48:23,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2024-10-24 12:48:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:23,815 INFO L225 Difference]: With dead ends: 132 [2024-10-24 12:48:23,815 INFO L226 Difference]: Without dead ends: 130 [2024-10-24 12:48:23,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2024-10-24 12:48:23,816 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 49 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:23,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 613 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 12:48:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-10-24 12:48:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2024-10-24 12:48:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 89 states have internal predecessors, (96), 27 states have call successors, (27), 10 states have call predecessors, (27), 13 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2024-10-24 12:48:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 152 transitions. [2024-10-24 12:48:23,824 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 152 transitions. Word has length 52 [2024-10-24 12:48:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:23,824 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 152 transitions. [2024-10-24 12:48:23,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 12:48:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 152 transitions. [2024-10-24 12:48:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-24 12:48:23,825 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:23,825 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:23,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-24 12:48:23,825 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:23,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 59208101, now seen corresponding path program 1 times [2024-10-24 12:48:23,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:23,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110183519] [2024-10-24 12:48:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:23,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:23,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:23,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 12:48:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,020 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-24 12:48:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-24 12:48:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110183519] [2024-10-24 12:48:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110183519] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:24,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:24,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 12:48:24,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114566098] [2024-10-24 12:48:24,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:24,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:48:24,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:48:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:48:24,027 INFO L87 Difference]: Start difference. First operand 125 states and 152 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-24 12:48:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:24,092 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2024-10-24 12:48:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:48:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 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 52 [2024-10-24 12:48:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:24,094 INFO L225 Difference]: With dead ends: 138 [2024-10-24 12:48:24,094 INFO L226 Difference]: Without dead ends: 126 [2024-10-24 12:48:24,094 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 12:48:24,094 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:24,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 249 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 12:48:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-24 12:48:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-10-24 12:48:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 90 states have internal predecessors, (97), 27 states have call successors, (27), 10 states have call predecessors, (27), 13 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2024-10-24 12:48:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2024-10-24 12:48:24,103 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 52 [2024-10-24 12:48:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:24,103 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2024-10-24 12:48:24,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-24 12:48:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2024-10-24 12:48:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-24 12:48:24,104 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:24,104 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:24,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-24 12:48:24,105 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:24,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1899618175, now seen corresponding path program 1 times [2024-10-24 12:48:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383450101] [2024-10-24 12:48:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:24,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,869 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,880 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 12:48:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,884 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-24 12:48:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-24 12:48:24,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383450101] [2024-10-24 12:48:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383450101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:24,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148254348] [2024-10-24 12:48:24,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:24,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:24,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:24,890 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 12:48:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:25,074 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2024-10-24 12:48:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:25,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 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 53 [2024-10-24 12:48:25,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:25,076 INFO L225 Difference]: With dead ends: 135 [2024-10-24 12:48:25,076 INFO L226 Difference]: Without dead ends: 133 [2024-10-24 12:48:25,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-24 12:48:25,076 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:25,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 520 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-24 12:48:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-10-24 12:48:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 95 states have internal predecessors, (101), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2024-10-24 12:48:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2024-10-24 12:48:25,088 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 53 [2024-10-24 12:48:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:25,088 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2024-10-24 12:48:25,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 12:48:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2024-10-24 12:48:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-10-24 12:48:25,090 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:25,090 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:25,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-24 12:48:25,090 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:25,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1662279464, now seen corresponding path program 1 times [2024-10-24 12:48:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398717811] [2024-10-24 12:48:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,781 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 12:48:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-24 12:48:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 12:48:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 12:48:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-10-24 12:48:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-24 12:48:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-24 12:48:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398717811] [2024-10-24 12:48:25,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398717811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:25,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:25,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 12:48:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643702159] [2024-10-24 12:48:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:25,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 12:48:25,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 12:48:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 12:48:25,819 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 12:48:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:25,996 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2024-10-24 12:48:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 12:48:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2024-10-24 12:48:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:26,000 INFO L225 Difference]: With dead ends: 140 [2024-10-24 12:48:26,000 INFO L226 Difference]: Without dead ends: 115 [2024-10-24 12:48:26,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:26,001 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 3 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:26,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 524 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 12:48:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-24 12:48:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2024-10-24 12:48:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.144736842105263) internal successors, (87), 81 states have internal predecessors, (87), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (23), 19 states have call predecessors, (23), 19 states have call successors, (23) [2024-10-24 12:48:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2024-10-24 12:48:26,013 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 59 [2024-10-24 12:48:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:26,013 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2024-10-24 12:48:26,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 12:48:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2024-10-24 12:48:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-24 12:48:26,014 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:26,014 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:26,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-24 12:48:26,015 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:26,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash -611066145, now seen corresponding path program 1 times [2024-10-24 12:48:26,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:26,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884231301] [2024-10-24 12:48:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,962 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:26,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:27,092 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 12:48:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:27,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:48:27,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:27,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884231301] [2024-10-24 12:48:27,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884231301] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914634809] [2024-10-24 12:48:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:27,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:27,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:48:27,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:48:27,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:48:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:27,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 2477 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-24 12:48:27,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:48:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 12:48:28,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 1 [2024-10-24 12:48:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:28,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:48:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914634809] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:29,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:48:29,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2024-10-24 12:48:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701476955] [2024-10-24 12:48:29,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 12:48:29,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 12:48:29,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 12:48:29,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-10-24 12:48:29,119 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-24 12:48:33,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 12:48:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:35,775 INFO L93 Difference]: Finished difference Result 315 states and 375 transitions. [2024-10-24 12:48:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-24 12:48:35,776 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2024-10-24 12:48:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:35,777 INFO L225 Difference]: With dead ends: 315 [2024-10-24 12:48:35,778 INFO L226 Difference]: Without dead ends: 255 [2024-10-24 12:48:35,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=2031, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 12:48:35,779 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 342 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:35,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 280 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1596 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-10-24 12:48:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-10-24 12:48:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 157. [2024-10-24 12:48:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 122 states have internal predecessors, (132), 23 states have call successors, (23), 13 states have call predecessors, (23), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2024-10-24 12:48:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2024-10-24 12:48:35,795 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 67 [2024-10-24 12:48:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:35,795 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2024-10-24 12:48:35,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-24 12:48:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2024-10-24 12:48:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-24 12:48:35,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:35,796 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:35,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:48:36,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-24 12:48:36,001 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:36,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2122184037, now seen corresponding path program 1 times [2024-10-24 12:48:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:36,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566086731] [2024-10-24 12:48:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,307 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,309 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,312 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,410 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 12:48:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,415 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-24 12:48:37,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566086731] [2024-10-24 12:48:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566086731] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399564149] [2024-10-24 12:48:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:48:37,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:48:37,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:48:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:37,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 2480 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-24 12:48:37,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:48:37,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 77 [2024-10-24 12:48:37,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 74 [2024-10-24 12:48:37,967 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-10-24 12:48:37,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 12:48:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:38,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:48:38,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399564149] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:38,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:48:38,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2024-10-24 12:48:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749142903] [2024-10-24 12:48:38,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 12:48:38,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:48:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:48:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2024-10-24 12:48:38,671 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand has 24 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 6 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-24 12:48:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:40,342 INFO L93 Difference]: Finished difference Result 282 states and 325 transitions. [2024-10-24 12:48:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 12:48:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 6 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) Word has length 67 [2024-10-24 12:48:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:40,344 INFO L225 Difference]: With dead ends: 282 [2024-10-24 12:48:40,344 INFO L226 Difference]: Without dead ends: 222 [2024-10-24 12:48:40,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=388, Invalid=2062, Unknown=0, NotChecked=0, Total=2450 [2024-10-24 12:48:40,345 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 297 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:40,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 274 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-24 12:48:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-10-24 12:48:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2024-10-24 12:48:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 112 states have (on average 1.125) internal successors, (126), 119 states have internal predecessors, (126), 23 states have call successors, (23), 13 states have call predecessors, (23), 18 states have return successors, (28), 21 states have call predecessors, (28), 21 states have call successors, (28) [2024-10-24 12:48:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2024-10-24 12:48:40,360 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 67 [2024-10-24 12:48:40,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:40,360 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2024-10-24 12:48:40,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 6 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 3 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-24 12:48:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2024-10-24 12:48:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-24 12:48:40,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:40,361 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:40,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:48:40,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-24 12:48:40,562 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:40,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash -713173704, now seen corresponding path program 1 times [2024-10-24 12:48:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169324091] [2024-10-24 12:48:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,755 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,761 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,768 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,876 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-24 12:48:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:41,882 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:48:42,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:42,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169324091] [2024-10-24 12:48:42,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169324091] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:42,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751561333] [2024-10-24 12:48:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:48:42,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:48:42,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:48:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:42,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-24 12:48:42,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:48:42,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 1 [2024-10-24 12:48:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:48:43,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:48:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751561333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:43,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:48:43,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2024-10-24 12:48:43,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527322183] [2024-10-24 12:48:43,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 12:48:43,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 12:48:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 12:48:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-10-24 12:48:43,349 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-24 12:48:47,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 12:48:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:49,552 INFO L93 Difference]: Finished difference Result 277 states and 324 transitions. [2024-10-24 12:48:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-24 12:48:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 69 [2024-10-24 12:48:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:49,555 INFO L225 Difference]: With dead ends: 277 [2024-10-24 12:48:49,555 INFO L226 Difference]: Without dead ends: 228 [2024-10-24 12:48:49,556 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 12:48:49,560 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 261 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:49,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 311 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1672 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-10-24 12:48:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-10-24 12:48:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 193. [2024-10-24 12:48:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 136 states have (on average 1.125) internal successors, (153), 143 states have internal predecessors, (153), 34 states have call successors, (34), 18 states have call predecessors, (34), 22 states have return successors, (36), 31 states have call predecessors, (36), 30 states have call successors, (36) [2024-10-24 12:48:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 223 transitions. [2024-10-24 12:48:49,609 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 223 transitions. Word has length 69 [2024-10-24 12:48:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:49,609 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 223 transitions. [2024-10-24 12:48:49,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.6) internal successors, (72), 19 states have internal predecessors, (72), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-24 12:48:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 223 transitions. [2024-10-24 12:48:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 12:48:49,614 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:49,614 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:49,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:48:49,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-24 12:48:49,815 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:49,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1331546384, now seen corresponding path program 1 times [2024-10-24 12:48:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189320671] [2024-10-24 12:48:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:50,977 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:50,980 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:50,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:50,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:50,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,005 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,096 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 12:48:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 12:48:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189320671] [2024-10-24 12:48:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189320671] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492394032] [2024-10-24 12:48:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:51,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:51,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:48:51,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:48:51,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:48:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:51,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 12:48:51,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:48:51,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 1 [2024-10-24 12:48:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-24 12:48:51,834 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 12:48:51,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492394032] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:51,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 12:48:51,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2024-10-24 12:48:51,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172822791] [2024-10-24 12:48:51,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:51,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:48:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:48:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:48:51,835 INFO L87 Difference]: Start difference. First operand 193 states and 223 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 12:48:56,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 12:48:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:56,351 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-10-24 12:48:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 12:48:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2024-10-24 12:48:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:56,353 INFO L225 Difference]: With dead ends: 305 [2024-10-24 12:48:56,353 INFO L226 Difference]: Without dead ends: 204 [2024-10-24 12:48:56,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-10-24 12:48:56,353 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 85 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:56,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 257 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-10-24 12:48:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-10-24 12:48:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2024-10-24 12:48:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 132 states have (on average 1.128787878787879) internal successors, (149), 138 states have internal predecessors, (149), 34 states have call successors, (34), 18 states have call predecessors, (34), 21 states have return successors, (34), 31 states have call predecessors, (34), 30 states have call successors, (34) [2024-10-24 12:48:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2024-10-24 12:48:56,374 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 73 [2024-10-24 12:48:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:56,374 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2024-10-24 12:48:56,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 12:48:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2024-10-24 12:48:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 12:48:56,375 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:56,375 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:56,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:48:56,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:56,576 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:56,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -629946510, now seen corresponding path program 1 times [2024-10-24 12:48:56,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:56,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505506424] [2024-10-24 12:48:56,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:56,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:57,994 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:57,997 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:57,999 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,014 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,027 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,032 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 12:48:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-24 12:48:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505506424] [2024-10-24 12:48:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505506424] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:48:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:48:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 12:48:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695419557] [2024-10-24 12:48:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:48:58,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:48:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:48:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:48:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:48:58,178 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 12:48:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 12:48:58,509 INFO L93 Difference]: Finished difference Result 237 states and 274 transitions. [2024-10-24 12:48:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 12:48:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2024-10-24 12:48:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 12:48:58,510 INFO L225 Difference]: With dead ends: 237 [2024-10-24 12:48:58,510 INFO L226 Difference]: Without dead ends: 194 [2024-10-24 12:48:58,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-24 12:48:58,511 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 12:48:58,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 177 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 12:48:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-10-24 12:48:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2024-10-24 12:48:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 140 states have internal predecessors, (150), 34 states have call successors, (34), 18 states have call predecessors, (34), 21 states have return successors, (34), 31 states have call predecessors, (34), 30 states have call successors, (34) [2024-10-24 12:48:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 218 transitions. [2024-10-24 12:48:58,531 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 218 transitions. Word has length 73 [2024-10-24 12:48:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 12:48:58,531 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 218 transitions. [2024-10-24 12:48:58,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-24 12:48:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 218 transitions. [2024-10-24 12:48:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-24 12:48:58,532 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 12:48:58,532 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:48:58,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-24 12:48:58,533 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 12:48:58,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:48:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2103303672, now seen corresponding path program 1 times [2024-10-24 12:48:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:48:58,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932940216] [2024-10-24 12:48:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:58,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:48:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,614 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-24 12:48:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-24 12:48:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,626 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 12:48:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 12:48:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-24 12:48:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,636 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-24 12:48:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-24 12:48:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,784 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-10-24 12:48:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:48:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-24 12:48:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:48:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932940216] [2024-10-24 12:48:59,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932940216] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:48:59,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558437169] [2024-10-24 12:48:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:48:59,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:48:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:48:59,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:48:59,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:49:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:49:00,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 2494 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 12:49:00,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:49:00,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 1 [2024-10-24 12:49:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 12:49:00,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:49:01,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558437169] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:49:01,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:49:01,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2024-10-24 12:49:01,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226675321] [2024-10-24 12:49:01,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 12:49:01,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-24 12:49:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:49:01,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-24 12:49:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-10-24 12:49:01,089 INFO L87 Difference]: Start difference. First operand 190 states and 218 transitions. Second operand has 24 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 7 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-24 12:49:05,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 12:49:09,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 12:49:13,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]