./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --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 32bit --witnessprinter.graph.data.programhash fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:33:31,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:33:31,397 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:33:31,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:33:31,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:33:31,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:33:31,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:33:31,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:33:31,433 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:33:31,434 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:33:31,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:33:31,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:33:31,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:33:31,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:33:31,438 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:33:31,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:33:31,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:33:31,439 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:33:31,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:33:31,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:33:31,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:33:31,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:33:31,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:33:31,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:33:31,443 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:33:31,444 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:33:31,444 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:33:31,444 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:33:31,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:33:31,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:33:31,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:33:31,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:33:31,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:33:31,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:33:31,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:33:31,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:33:31,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:33:31,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:33:31,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:33:31,449 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:33:31,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:33:31,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:33:31,449 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/certificate-witnesses-artifact/automizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab3df42fb7f885fd39a281a051af0420a7d494ced4f3c2e06236facb6a7ec78 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:33:31,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:33:31,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:33:31,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:33:31,777 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:33:31,777 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:33:31,779 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-12 16:33:33,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:33:33,483 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:33:33,483 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c [2024-09-12 16:33:33,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8df9abbfd/b71dabea9fd4467d8e31449d94ee072e/FLAG64058cda9 [2024-09-12 16:33:33,509 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8df9abbfd/b71dabea9fd4467d8e31449d94ee072e [2024-09-12 16:33:33,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:33:33,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:33:33,515 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:33:33,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:33:33,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:33:33,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f13573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33, skipping insertion in model container [2024-09-12 16:33:33,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,542 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:33:33,698 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-12 16:33:33,703 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-12 16:33:33,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:33:33,721 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:33:33,735 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1474,1487] [2024-09-12 16:33:33,737 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_loop-invariants/recursified_linear-inequality-inv-a.c[1547,1560] [2024-09-12 16:33:33,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:33:33,764 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:33:33,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33 WrapperNode [2024-09-12 16:33:33,765 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:33:33,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:33:33,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:33:33,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:33:33,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,790 INFO L138 Inliner]: procedures = 13, calls = 46, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:33:33,791 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:33:33,792 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:33:33,792 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:33:33,792 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:33:33,800 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,822 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 4, 4, 5, 3]. 28 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 3 writes are split as follows [0, 1, 1, 1, 0]. [2024-09-12 16:33:33,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,836 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:33:33,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:33:33,845 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:33:33,845 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:33:33,846 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (1/1) ... [2024-09-12 16:33:33,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:33:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:33,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 16:33:33,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 16:33:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:33:33,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:33:33,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:33:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:33:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 16:33:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 16:33:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 16:33:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 16:33:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-12 16:33:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:33:33,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:33:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:33:33,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:33:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 16:33:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 16:33:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 16:33:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 16:33:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-12 16:33:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 16:33:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_15_0 [2024-09-12 16:33:33,930 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_15_0 [2024-09-12 16:33:34,007 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:33:34,010 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:33:34,261 INFO L? ?]: Removed 3 outVars from TransFormulas that were not future-live. [2024-09-12 16:33:34,262 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:33:34,286 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:33:34,287 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-12 16:33:34,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:33:34 BoogieIcfgContainer [2024-09-12 16:33:34,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:33:34,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:33:34,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:33:34,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:33:34,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:33:33" (1/3) ... [2024-09-12 16:33:34,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c25069e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:33:34, skipping insertion in model container [2024-09-12 16:33:34,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:33:33" (2/3) ... [2024-09-12 16:33:34,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c25069e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:33:34, skipping insertion in model container [2024-09-12 16:33:34,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:33:34" (3/3) ... [2024-09-12 16:33:34,298 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_linear-inequality-inv-a.c [2024-09-12 16:33:34,315 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:33:34,315 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-12 16:33:34,378 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:33:34,384 INFO L336 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=All, 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;@297aba0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:33:34,385 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-12 16:33:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 16:33:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 16:33:34,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:34,397 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:34,398 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:34,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -211352663, now seen corresponding path program 1 times [2024-09-12 16:33:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509159440] [2024-09-12 16:33:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:34,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:34,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:33:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509159440] [2024-09-12 16:33:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509159440] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:33:35,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:33:35,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 16:33:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406475543] [2024-09-12 16:33:35,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:33:35,064 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 16:33:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:35,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 16:33:35,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:33:35,092 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 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) [2024-09-12 16:33:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:35,257 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-09-12 16:33:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:33:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 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 14 [2024-09-12 16:33:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:35,268 INFO L225 Difference]: With dead ends: 38 [2024-09-12 16:33:35,269 INFO L226 Difference]: Without dead ends: 26 [2024-09-12 16:33:35,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 16:33:35,278 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:35,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:33:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-12 16:33:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-09-12 16:33:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 16:33:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-09-12 16:33:35,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2024-09-12 16:33:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:35,329 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-09-12 16:33:35,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 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) [2024-09-12 16:33:35,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-09-12 16:33:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 16:33:35,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:35,331 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:35,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:33:35,331 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2038005093, now seen corresponding path program 1 times [2024-09-12 16:33:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:35,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737536644] [2024-09-12 16:33:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:35,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:35,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:35,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:33:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:35,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737536644] [2024-09-12 16:33:35,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737536644] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:33:35,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:33:35,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-12 16:33:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077050672] [2024-09-12 16:33:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:33:35,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 16:33:35,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:35,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 16:33:35,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-12 16:33:35,596 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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) [2024-09-12 16:33:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:35,723 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-09-12 16:33:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 16:33:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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 [2024-09-12 16:33:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:35,725 INFO L225 Difference]: With dead ends: 26 [2024-09-12 16:33:35,725 INFO L226 Difference]: Without dead ends: 21 [2024-09-12 16:33:35,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-12 16:33:35,727 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:35,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:33:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-12 16:33:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-12 16:33:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-12 16:33:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-12 16:33:35,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-09-12 16:33:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:35,740 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-12 16:33:35,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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) [2024-09-12 16:33:35,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-12 16:33:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 16:33:35,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:35,743 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:35,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 16:33:35,744 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:35,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash -907560216, now seen corresponding path program 1 times [2024-09-12 16:33:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:35,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435682949] [2024-09-12 16:33:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:36,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:36,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:36,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:33:36,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435682949] [2024-09-12 16:33:36,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435682949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:36,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15115242] [2024-09-12 16:33:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:36,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:36,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:33:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:36,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-12 16:33:36,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:36,956 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 15 treesize of output 1 [2024-09-12 16:33:37,022 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 25 treesize of output 17 [2024-09-12 16:33:37,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 21 treesize of output 13 [2024-09-12 16:33:37,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 17 treesize of output 9 [2024-09-12 16:33:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:33:37,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:37,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 30 treesize of output 18 [2024-09-12 16:33:41,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 130 treesize of output 122 [2024-09-12 16:33:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:33:45,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15115242] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:33:45,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:33:45,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-09-12 16:33:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883377365] [2024-09-12 16:33:45,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:45,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:33:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:33:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2024-09-12 16:33:45,668 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:46,378 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-12 16:33:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 16:33:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 19 [2024-09-12 16:33:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:46,380 INFO L225 Difference]: With dead ends: 34 [2024-09-12 16:33:46,381 INFO L226 Difference]: Without dead ends: 30 [2024-09-12 16:33:46,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=131, Invalid=624, Unknown=1, NotChecked=0, Total=756 [2024-09-12 16:33:46,383 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:46,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 85 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 16:33:46,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-12 16:33:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-09-12 16:33:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 16:33:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-12 16:33:46,399 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2024-09-12 16:33:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:46,400 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-12 16:33:46,401 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:46,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-12 16:33:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 16:33:46,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:46,405 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:46,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:33:46,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:46,606 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:46,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1930407430, now seen corresponding path program 1 times [2024-09-12 16:33:46,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:46,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852278510] [2024-09-12 16:33:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:46,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:46,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:46,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:47,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:33:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852278510] [2024-09-12 16:33:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852278510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:47,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863396708] [2024-09-12 16:33:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:47,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:47,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:47,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:33:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:47,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-12 16:33:47,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:47,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:47,302 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 23 treesize of output 3 [2024-09-12 16:33:47,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:33:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:33:47,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:47,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 17 treesize of output 13 [2024-09-12 16:33:47,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 5 [2024-09-12 16:33:47,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 25 [2024-09-12 16:33:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:33:47,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863396708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:33:47,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:33:47,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2024-09-12 16:33:47,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574919199] [2024-09-12 16:33:47,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:47,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 16:33:47,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:47,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 16:33:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:33:47,715 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:48,121 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-09-12 16:33:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:33:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 20 [2024-09-12 16:33:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:48,124 INFO L225 Difference]: With dead ends: 30 [2024-09-12 16:33:48,124 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 16:33:48,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2024-09-12 16:33:48,126 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:48,126 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 83 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:33:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 16:33:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-12 16:33:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 16:33:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-12 16:33:48,134 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2024-09-12 16:33:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:48,135 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-12 16:33:48,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:48,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-12 16:33:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 16:33:48,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:48,136 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:48,153 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 16:33:48,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:48,341 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:48,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1429057543, now seen corresponding path program 2 times [2024-09-12 16:33:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232685634] [2024-09-12 16:33:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:48,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:48,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:48,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:49,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:49,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 16:33:49,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:49,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232685634] [2024-09-12 16:33:49,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232685634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:49,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854652471] [2024-09-12 16:33:49,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:33:49,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:49,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:49,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:33:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:33:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:33:49,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-12 16:33:49,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:49,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:49,708 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 15 treesize of output 1 [2024-09-12 16:33:49,829 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 23 treesize of output 3 [2024-09-12 16:33:49,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:33:49,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:33:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 16:33:49,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:50,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 81 treesize of output 65 [2024-09-12 16:33:50,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 76 treesize of output 72 [2024-09-12 16:33:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854652471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:51,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:33:51,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2024-09-12 16:33:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688053327] [2024-09-12 16:33:51,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:51,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 16:33:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 16:33:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-09-12 16:33:51,217 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:51,549 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-09-12 16:33:51,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 16:33:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 24 [2024-09-12 16:33:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:51,551 INFO L225 Difference]: With dead ends: 31 [2024-09-12 16:33:51,551 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 16:33:51,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2024-09-12 16:33:51,552 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:51,552 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:33:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 16:33:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-12 16:33:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:33:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-09-12 16:33:51,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2024-09-12 16:33:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:51,567 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-09-12 16:33:51,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:51,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-09-12 16:33:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 16:33:51,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:51,569 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:51,588 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:33:51,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:51,770 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:51,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1351107819, now seen corresponding path program 2 times [2024-09-12 16:33:51,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426484947] [2024-09-12 16:33:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:52,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:52,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:52,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:52,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 16:33:52,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:52,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426484947] [2024-09-12 16:33:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426484947] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518473610] [2024-09-12 16:33:52,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:33:52,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:52,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:52,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:52,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:33:52,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:33:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:33:52,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 16:33:52,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:52,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:52,803 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 15 treesize of output 1 [2024-09-12 16:33:52,919 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 23 treesize of output 3 [2024-09-12 16:33:52,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 21 [2024-09-12 16:33:52,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:33:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 16:33:52,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:53,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 47 [2024-09-12 16:33:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518473610] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:53,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:33:53,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2024-09-12 16:33:53,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590236432] [2024-09-12 16:33:53,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:53,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 16:33:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 16:33:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-09-12 16:33:53,678 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:53,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:53,988 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-09-12 16:33:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:33:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 25 [2024-09-12 16:33:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:53,990 INFO L225 Difference]: With dead ends: 32 [2024-09-12 16:33:53,990 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 16:33:53,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 16:33:53,991 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:53,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:33:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 16:33:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-12 16:33:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-12 16:33:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-12 16:33:53,997 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2024-09-12 16:33:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:53,998 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-12 16:33:53,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.625) internal successors, (26), 18 states have internal predecessors, (26), 6 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-12 16:33:53,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-12 16:33:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 16:33:53,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:53,999 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:54,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 16:33:54,200 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:54,201 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:54,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash 450584184, now seen corresponding path program 3 times [2024-09-12 16:33:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:54,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255939869] [2024-09-12 16:33:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:54,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:54,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:54,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:55,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:55,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:55,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 16:33:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255939869] [2024-09-12 16:33:55,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255939869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054447306] [2024-09-12 16:33:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:33:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:55,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:55,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:33:55,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:33:55,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:33:55,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-12 16:33:55,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:55,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:55,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:55,934 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 15 treesize of output 1 [2024-09-12 16:33:56,175 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 23 treesize of output 3 [2024-09-12 16:33:56,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:33:56,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:33:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 16:33:56,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:56,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 109 treesize of output 93 [2024-09-12 16:33:56,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 93 treesize of output 77 [2024-09-12 16:33:57,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 52 treesize of output 48 [2024-09-12 16:33:57,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 78 treesize of output 74 [2024-09-12 16:33:57,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054447306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:57,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:33:57,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-09-12 16:33:57,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081720116] [2024-09-12 16:33:57,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:33:57,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 16:33:57,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:33:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 16:33:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-09-12 16:33:57,490 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-12 16:33:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:33:57,771 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2024-09-12 16:33:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:33:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 29 [2024-09-12 16:33:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:33:57,773 INFO L225 Difference]: With dead ends: 33 [2024-09-12 16:33:57,773 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 16:33:57,774 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:33:57,774 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:33:57,775 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:33:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 16:33:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 16:33:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 16:33:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-09-12 16:33:57,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2024-09-12 16:33:57,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:33:57,786 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-09-12 16:33:57,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-12 16:33:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-09-12 16:33:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 16:33:57,788 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:33:57,788 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:33:57,804 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 16:33:57,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 16:33:57,993 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:33:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:33:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1083210870, now seen corresponding path program 3 times [2024-09-12 16:33:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:33:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427535667] [2024-09-12 16:33:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:33:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:33:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:58,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:33:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:58,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:33:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:58,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:58,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:58,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:33:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:33:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:33:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:33:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427535667] [2024-09-12 16:33:59,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427535667] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:33:59,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55797858] [2024-09-12 16:33:59,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:33:59,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:33:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:33:59,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:33:59,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:33:59,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 16:33:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:33:59,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-12 16:33:59,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:33:59,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:59,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:33:59,298 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 15 treesize of output 1 [2024-09-12 16:33:59,467 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 23 treesize of output 3 [2024-09-12 16:33:59,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 21 [2024-09-12 16:33:59,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:33:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 16:33:59,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:33:59,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 68 [2024-09-12 16:33:59,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 56 [2024-09-12 16:34:00,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 30 treesize of output 26 [2024-09-12 16:34:00,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55797858] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:00,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:00,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-09-12 16:34:00,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633262173] [2024-09-12 16:34:00,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:00,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 16:34:00,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 16:34:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-12 16:34:00,476 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:34:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:00,773 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-12 16:34:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:34:00,774 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 30 [2024-09-12 16:34:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:00,775 INFO L225 Difference]: With dead ends: 34 [2024-09-12 16:34:00,775 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 16:34:00,776 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:34:00,776 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:00,776 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 16:34:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-12 16:34:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-12 16:34:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-09-12 16:34:00,784 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 30 [2024-09-12 16:34:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:00,784 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-09-12 16:34:00,785 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-12 16:34:00,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-09-12 16:34:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 16:34:00,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:00,786 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:00,799 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:00,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:00,987 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:00,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:00,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2115644489, now seen corresponding path program 4 times [2024-09-12 16:34:00,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:00,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916487723] [2024-09-12 16:34:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:00,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:01,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:01,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:02,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 16:34:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916487723] [2024-09-12 16:34:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916487723] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221810969] [2024-09-12 16:34:03,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:34:03,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:03,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:03,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:34:03,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:34:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:03,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-12 16:34:03,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:03,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:03,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:03,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:03,427 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 15 treesize of output 1 [2024-09-12 16:34:03,641 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 23 treesize of output 3 [2024-09-12 16:34:03,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:34:03,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:34:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 16:34:03,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:04,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 137 treesize of output 121 [2024-09-12 16:34:04,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 121 treesize of output 105 [2024-09-12 16:34:04,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 105 treesize of output 89 [2024-09-12 16:34:04,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 55 [2024-09-12 16:34:04,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 53 treesize of output 49 [2024-09-12 16:34:04,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 76 [2024-09-12 16:34:05,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221810969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:05,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:05,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2024-09-12 16:34:05,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429313552] [2024-09-12 16:34:05,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:05,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 16:34:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 16:34:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-09-12 16:34:05,422 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-12 16:34:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:05,681 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-09-12 16:34:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:34:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-09-12 16:34:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:05,682 INFO L225 Difference]: With dead ends: 35 [2024-09-12 16:34:05,683 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 16:34:05,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 16:34:05,684 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:05,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 122 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 16:34:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-12 16:34:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:34:05,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-09-12 16:34:05,692 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 34 [2024-09-12 16:34:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:05,693 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-09-12 16:34:05,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-12 16:34:05,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-09-12 16:34:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 16:34:05,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:05,695 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:05,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:34:05,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:05,896 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:05,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1160472773, now seen corresponding path program 4 times [2024-09-12 16:34:05,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:05,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632616770] [2024-09-12 16:34:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:05,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:06,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:06,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:06,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:07,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:07,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:07,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 16:34:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:07,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632616770] [2024-09-12 16:34:07,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632616770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:07,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44426139] [2024-09-12 16:34:07,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:34:07,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:07,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:07,301 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:07,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:34:07,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:34:07,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:07,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 16:34:07,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:07,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:07,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:07,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:07,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:07,736 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 23 treesize of output 3 [2024-09-12 16:34:07,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:34:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 16:34:07,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:08,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 38 treesize of output 34 [2024-09-12 16:34:08,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 101 treesize of output 89 [2024-09-12 16:34:08,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 89 treesize of output 77 [2024-09-12 16:34:08,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 65 treesize of output 53 [2024-09-12 16:34:08,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 43 treesize of output 39 [2024-09-12 16:34:08,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 33 [2024-09-12 16:34:08,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 31 treesize of output 27 [2024-09-12 16:34:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44426139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:08,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2024-09-12 16:34:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095929277] [2024-09-12 16:34:08,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:08,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 16:34:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 16:34:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-09-12 16:34:08,572 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-12 16:34:08,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:08,715 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-12 16:34:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:34:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) Word has length 35 [2024-09-12 16:34:08,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:08,716 INFO L225 Difference]: With dead ends: 36 [2024-09-12 16:34:08,716 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 16:34:08,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 16:34:08,718 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:08,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 79 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 16:34:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 16:34:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-12 16:34:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-09-12 16:34:08,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 35 [2024-09-12 16:34:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:08,725 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-09-12 16:34:08,725 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 21 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 10 states have return successors, (11), 11 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-12 16:34:08,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-09-12 16:34:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 16:34:08,727 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:08,727 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:08,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:08,927 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:08,928 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:08,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 964329992, now seen corresponding path program 5 times [2024-09-12 16:34:08,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:08,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828467928] [2024-09-12 16:34:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:08,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:09,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:09,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:10,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:10,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:11,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:11,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:11,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:34:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828467928] [2024-09-12 16:34:11,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828467928] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891962941] [2024-09-12 16:34:11,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:34:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:11,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:11,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:34:12,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 16:34:12,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:12,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-09-12 16:34:12,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:12,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:12,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:12,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:12,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:12,513 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 15 treesize of output 1 [2024-09-12 16:34:12,781 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 23 treesize of output 3 [2024-09-12 16:34:12,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:34:12,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:34:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 16:34:12,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:13,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 165 treesize of output 149 [2024-09-12 16:34:13,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 149 treesize of output 133 [2024-09-12 16:34:13,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 133 treesize of output 117 [2024-09-12 16:34:13,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 117 treesize of output 101 [2024-09-12 16:34:14,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 66 treesize of output 62 [2024-09-12 16:34:14,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 60 treesize of output 56 [2024-09-12 16:34:14,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 54 treesize of output 50 [2024-09-12 16:34:14,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 82 treesize of output 78 [2024-09-12 16:34:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891962941] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:14,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:14,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2024-09-12 16:34:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244736803] [2024-09-12 16:34:14,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:14,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 16:34:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 16:34:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:34:14,986 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-12 16:34:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:15,214 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-09-12 16:34:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:34:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 39 [2024-09-12 16:34:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:15,215 INFO L225 Difference]: With dead ends: 37 [2024-09-12 16:34:15,215 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 16:34:15,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:34:15,216 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:15,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:15,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 16:34:15,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-12 16:34:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 16:34:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-09-12 16:34:15,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 39 [2024-09-12 16:34:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:15,224 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-09-12 16:34:15,224 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 23 states have internal predecessors, (31), 8 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-12 16:34:15,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-09-12 16:34:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 16:34:15,225 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:15,225 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:15,241 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:15,425 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 16:34:15,426 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:15,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash -170538266, now seen corresponding path program 5 times [2024-09-12 16:34:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:15,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531231608] [2024-09-12 16:34:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:15,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:16,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:16,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:16,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:17,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:17,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:17,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 16:34:17,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:17,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531231608] [2024-09-12 16:34:17,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531231608] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:17,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539636278] [2024-09-12 16:34:17,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:34:17,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:17,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:17,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 16:34:17,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-12 16:34:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:17,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-12 16:34:17,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:17,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:17,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:17,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:17,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:17,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:18,059 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 23 treesize of output 3 [2024-09-12 16:34:18,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:34:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 16:34:18,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:18,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 45 treesize of output 41 [2024-09-12 16:34:18,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 122 treesize of output 110 [2024-09-12 16:34:18,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 412 treesize of output 364 [2024-09-12 16:34:18,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 364 treesize of output 316 [2024-09-12 16:34:18,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 316 treesize of output 268 [2024-09-12 16:34:19,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 50 treesize of output 46 [2024-09-12 16:34:19,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 44 treesize of output 40 [2024-09-12 16:34:19,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 38 treesize of output 34 [2024-09-12 16:34:19,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 32 treesize of output 28 [2024-09-12 16:34:19,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539636278] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:19,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:19,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2024-09-12 16:34:19,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228380031] [2024-09-12 16:34:19,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:19,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 16:34:19,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:19,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 16:34:19,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=764, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:34:19,988 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 25 states have internal predecessors, (33), 8 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-12 16:34:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:20,176 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2024-09-12 16:34:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:34:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 25 states have internal predecessors, (33), 8 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 40 [2024-09-12 16:34:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:20,177 INFO L225 Difference]: With dead ends: 38 [2024-09-12 16:34:20,177 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 16:34:20,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:34:20,178 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:20,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 94 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 16:34:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-12 16:34:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-12 16:34:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-12 16:34:20,192 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2024-09-12 16:34:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:20,192 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-12 16:34:20,193 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 25 states have internal predecessors, (33), 8 states have call successors, (9), 3 states have call predecessors, (9), 12 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-12 16:34:20,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-12 16:34:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 16:34:20,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:20,194 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:20,214 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 16:34:20,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 16:34:20,394 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:20,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash 365992089, now seen corresponding path program 6 times [2024-09-12 16:34:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363025677] [2024-09-12 16:34:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:21,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:21,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:21,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:22,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:22,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:23,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:23,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:23,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 14 proven. 48 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-12 16:34:23,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363025677] [2024-09-12 16:34:23,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363025677] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:23,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949739591] [2024-09-12 16:34:23,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:34:23,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:23,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:23,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 16:34:23,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 16:34:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:23,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-12 16:34:23,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:23,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:23,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:23,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:23,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:23,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:23,976 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 15 treesize of output 1 [2024-09-12 16:34:24,331 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 23 treesize of output 3 [2024-09-12 16:34:24,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:34:24,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:34:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 16:34:24,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:25,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 298 treesize of output 274 [2024-09-12 16:34:25,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 274 treesize of output 250 [2024-09-12 16:34:25,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 250 treesize of output 226 [2024-09-12 16:34:25,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 226 treesize of output 202 [2024-09-12 16:34:25,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 202 treesize of output 178 [2024-09-12 16:34:31,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 144 treesize of output 136 [2024-09-12 16:34:31,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 132 treesize of output 124 [2024-09-12 16:34:31,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 120 treesize of output 112 [2024-09-12 16:34:31,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 108 treesize of output 100 [2024-09-12 16:34:31,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 146 treesize of output 138 [2024-09-12 16:34:32,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949739591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:32,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-09-12 16:34:32,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946558428] [2024-09-12 16:34:32,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:32,644 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 16:34:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:32,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 16:34:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:34:32,646 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 16:34:32,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:32,883 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-09-12 16:34:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:34:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) Word has length 44 [2024-09-12 16:34:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:32,884 INFO L225 Difference]: With dead ends: 39 [2024-09-12 16:34:32,884 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 16:34:32,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 16:34:32,885 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:32,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 110 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 16:34:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-12 16:34:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-12 16:34:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-09-12 16:34:32,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 44 [2024-09-12 16:34:32,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:32,892 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-09-12 16:34:32,893 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 26 states have internal predecessors, (34), 8 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (15), 15 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 16:34:32,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-09-12 16:34:32,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 16:34:32,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:32,894 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:32,907 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:33,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:33,094 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:33,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1539144075, now seen corresponding path program 6 times [2024-09-12 16:34:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:33,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901239469] [2024-09-12 16:34:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:33,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:33,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:33,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:34,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:34,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:35,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:35,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:35,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:35,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-12 16:34:35,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:35,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901239469] [2024-09-12 16:34:35,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901239469] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:35,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788312655] [2024-09-12 16:34:35,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:34:35,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:35,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:35,416 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:35,417 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 16:34:35,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 16:34:35,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:35,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-09-12 16:34:35,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:35,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:35,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:35,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:35,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:35,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:35,979 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 15 treesize of output 1 [2024-09-12 16:34:36,218 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 23 treesize of output 3 [2024-09-12 16:34:36,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 21 [2024-09-12 16:34:36,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:34:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 16:34:36,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:37,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 143 treesize of output 131 [2024-09-12 16:34:37,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 496 treesize of output 448 [2024-09-12 16:34:37,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 448 treesize of output 400 [2024-09-12 16:34:37,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 400 treesize of output 352 [2024-09-12 16:34:37,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 352 treesize of output 304 [2024-09-12 16:34:38,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 51 treesize of output 47 [2024-09-12 16:34:38,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 45 treesize of output 41 [2024-09-12 16:34:38,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 39 treesize of output 35 [2024-09-12 16:34:38,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 33 treesize of output 29 [2024-09-12 16:34:38,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788312655] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:38,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:38,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-09-12 16:34:38,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001974489] [2024-09-12 16:34:38,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:38,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 16:34:38,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 16:34:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 16:34:38,572 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (15), 15 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-12 16:34:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:38,834 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-12 16:34:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:34:38,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (15), 15 states have call predecessors, (15), 7 states have call successors, (15) Word has length 45 [2024-09-12 16:34:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:38,836 INFO L225 Difference]: With dead ends: 40 [2024-09-12 16:34:38,836 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 16:34:38,836 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 16:34:38,837 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:38,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 94 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 16:34:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-12 16:34:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 16:34:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-09-12 16:34:38,843 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2024-09-12 16:34:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:38,843 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-09-12 16:34:38,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (8), 4 states have call predecessors, (8), 15 states have return successors, (15), 15 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-12 16:34:38,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-09-12 16:34:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 16:34:38,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:38,844 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:38,859 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 16:34:39,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 16:34:39,045 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:39,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 585835928, now seen corresponding path program 7 times [2024-09-12 16:34:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:39,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954624582] [2024-09-12 16:34:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:39,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:39,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:40,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:41,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:42,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:42,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:42,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:43,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:43,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 17 proven. 63 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-12 16:34:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954624582] [2024-09-12 16:34:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954624582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924897963] [2024-09-12 16:34:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 16:34:43,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:43,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:43,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 16:34:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:43,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-09-12 16:34:43,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:43,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:43,834 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 15 treesize of output 1 [2024-09-12 16:34:44,166 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 23 treesize of output 3 [2024-09-12 16:34:44,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:34:44,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:34:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 16:34:44,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:45,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 221 treesize of output 205 [2024-09-12 16:34:45,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 205 treesize of output 189 [2024-09-12 16:34:45,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 189 treesize of output 173 [2024-09-12 16:34:45,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 173 treesize of output 157 [2024-09-12 16:34:45,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 157 treesize of output 141 [2024-09-12 16:34:45,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 141 treesize of output 125 [2024-09-12 16:34:46,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 76 [2024-09-12 16:34:46,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 74 treesize of output 70 [2024-09-12 16:34:46,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 64 [2024-09-12 16:34:46,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 62 treesize of output 58 [2024-09-12 16:34:46,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 56 treesize of output 52 [2024-09-12 16:34:46,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 86 treesize of output 82 [2024-09-12 16:34:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924897963] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:47,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:47,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 31 [2024-09-12 16:34:47,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020672836] [2024-09-12 16:34:47,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:47,402 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-12 16:34:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-12 16:34:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 16:34:47,404 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-12 16:34:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:47,658 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-09-12 16:34:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:34:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) Word has length 49 [2024-09-12 16:34:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:47,659 INFO L225 Difference]: With dead ends: 41 [2024-09-12 16:34:47,659 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 16:34:47,660 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 16:34:47,661 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:47,661 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 129 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 16:34:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 16:34:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 16:34:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-12 16:34:47,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 49 [2024-09-12 16:34:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:47,667 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-12 16:34:47,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 8 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (17), 17 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-12 16:34:47,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-12 16:34:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 16:34:47,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:47,668 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:47,682 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-12 16:34:47,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 16:34:47,869 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:47,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash 981047638, now seen corresponding path program 7 times [2024-09-12 16:34:47,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:47,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278835656] [2024-09-12 16:34:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:47,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:48,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:48,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:49,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:49,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 16:34:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278835656] [2024-09-12 16:34:50,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278835656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:50,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860813058] [2024-09-12 16:34:50,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 16:34:50,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:50,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:50,952 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 16:34:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:51,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-12 16:34:51,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:51,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:51,571 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 23 treesize of output 3 [2024-09-12 16:34:51,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:34:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 16:34:51,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:34:52,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 55 [2024-09-12 16:34:52,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 164 treesize of output 152 [2024-09-12 16:34:52,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 152 treesize of output 140 [2024-09-12 16:34:52,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 508 treesize of output 460 [2024-09-12 16:34:52,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 460 treesize of output 412 [2024-09-12 16:34:52,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 412 treesize of output 364 [2024-09-12 16:34:52,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 364 treesize of output 316 [2024-09-12 16:34:53,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 60 [2024-09-12 16:34:53,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 58 treesize of output 54 [2024-09-12 16:34:53,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 52 treesize of output 48 [2024-09-12 16:34:53,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 46 treesize of output 42 [2024-09-12 16:34:53,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 40 treesize of output 36 [2024-09-12 16:34:53,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 34 treesize of output 30 [2024-09-12 16:34:53,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860813058] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:53,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:34:53,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2024-09-12 16:34:53,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390368066] [2024-09-12 16:34:53,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:34:53,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 16:34:53,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:34:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 16:34:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:34:53,533 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-12 16:34:53,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:34:53,696 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-09-12 16:34:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:34:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) Word has length 50 [2024-09-12 16:34:53,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:34:53,697 INFO L225 Difference]: With dead ends: 42 [2024-09-12 16:34:53,697 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 16:34:53,698 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 16:34:53,698 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:34:53,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:34:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 16:34:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-12 16:34:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-12 16:34:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2024-09-12 16:34:53,707 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50 [2024-09-12 16:34:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:34:53,707 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2024-09-12 16:34:53,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 26 states have internal predecessors, (34), 6 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (17), 16 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-12 16:34:53,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2024-09-12 16:34:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 16:34:53,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:34:53,708 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:34:53,722 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 16:34:53,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 16:34:53,909 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:34:53,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:34:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash 419927273, now seen corresponding path program 8 times [2024-09-12 16:34:53,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:34:53,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598287827] [2024-09-12 16:34:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:34:53,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:34:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:54,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:34:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:54,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:34:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:55,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:56,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:57,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:57,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:58,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:58,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:58,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:58,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:34:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:34:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 16:34:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:34:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598287827] [2024-09-12 16:34:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598287827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:34:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448348425] [2024-09-12 16:34:58,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:34:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:34:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:34:58,623 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:34:58,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 16:34:58,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:34:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:34:58,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-09-12 16:34:58,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:34:58,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:34:59,186 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 15 treesize of output 1 [2024-09-12 16:34:59,578 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 23 treesize of output 3 [2024-09-12 16:34:59,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:34:59,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:34:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 87 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-12 16:34:59,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:00,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 249 treesize of output 233 [2024-09-12 16:35:00,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 233 treesize of output 217 [2024-09-12 16:35:00,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 217 treesize of output 201 [2024-09-12 16:35:00,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 201 treesize of output 185 [2024-09-12 16:35:00,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 185 treesize of output 169 [2024-09-12 16:35:00,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 169 treesize of output 153 [2024-09-12 16:35:00,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 153 treesize of output 137 [2024-09-12 16:35:02,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 87 treesize of output 83 [2024-09-12 16:35:02,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 81 treesize of output 77 [2024-09-12 16:35:02,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 75 treesize of output 71 [2024-09-12 16:35:02,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 69 treesize of output 65 [2024-09-12 16:35:02,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 63 treesize of output 59 [2024-09-12 16:35:02,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 57 treesize of output 53 [2024-09-12 16:35:02,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 88 treesize of output 84 [2024-09-12 16:35:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448348425] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:03,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:03,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 33 [2024-09-12 16:35:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294704552] [2024-09-12 16:35:03,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:03,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 16:35:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 16:35:03,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 16:35:03,162 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-12 16:35:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:03,416 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2024-09-12 16:35:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 16:35:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 8 states have call successors, (19) Word has length 54 [2024-09-12 16:35:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:03,417 INFO L225 Difference]: With dead ends: 43 [2024-09-12 16:35:03,417 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 16:35:03,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 16:35:03,419 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:03,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 126 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:35:03,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 16:35:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-12 16:35:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-12 16:35:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-09-12 16:35:03,425 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 54 [2024-09-12 16:35:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:03,425 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-09-12 16:35:03,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 29 states have internal predecessors, (37), 8 states have call successors, (9), 4 states have call predecessors, (9), 18 states have return successors, (19), 19 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-12 16:35:03,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-09-12 16:35:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 16:35:03,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:03,426 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:03,446 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-12 16:35:03,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 16:35:03,627 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash 132846629, now seen corresponding path program 8 times [2024-09-12 16:35:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709643749] [2024-09-12 16:35:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:04,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:04,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:35:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:05,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:05,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:06,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:06,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:06,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:07,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:07,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:07,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 16:35:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:07,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709643749] [2024-09-12 16:35:07,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709643749] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:07,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739357989] [2024-09-12 16:35:07,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:35:07,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:07,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:35:07,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 16:35:07,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:35:07,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:07,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-12 16:35:07,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:07,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:07,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:08,051 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 23 treesize of output 3 [2024-09-12 16:35:08,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:35:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-09-12 16:35:08,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:08,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 66 treesize of output 62 [2024-09-12 16:35:08,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 185 treesize of output 173 [2024-09-12 16:35:08,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 173 treesize of output 161 [2024-09-12 16:35:08,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 592 treesize of output 544 [2024-09-12 16:35:08,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 544 treesize of output 496 [2024-09-12 16:35:08,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 496 treesize of output 448 [2024-09-12 16:35:08,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 448 treesize of output 400 [2024-09-12 16:35:08,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 400 treesize of output 352 [2024-09-12 16:35:10,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 71 treesize of output 67 [2024-09-12 16:35:10,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 65 treesize of output 61 [2024-09-12 16:35:10,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 55 [2024-09-12 16:35:10,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 53 treesize of output 49 [2024-09-12 16:35:10,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 47 treesize of output 43 [2024-09-12 16:35:10,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 41 treesize of output 37 [2024-09-12 16:35:10,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 31 [2024-09-12 16:35:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739357989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:10,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 29 [2024-09-12 16:35:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582521314] [2024-09-12 16:35:10,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:10,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 16:35:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 16:35:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 16:35:10,344 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-12 16:35:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:10,512 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-09-12 16:35:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:35:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) Word has length 55 [2024-09-12 16:35:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:10,513 INFO L225 Difference]: With dead ends: 44 [2024-09-12 16:35:10,513 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 16:35:10,514 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 16:35:10,514 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:10,514 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:35:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 16:35:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 16:35:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-12 16:35:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-12 16:35:10,527 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-12 16:35:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:10,529 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-12 16:35:10,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.44) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (19), 18 states have call predecessors, (19), 6 states have call successors, (19) [2024-09-12 16:35:10,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-12 16:35:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 16:35:10,530 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:10,530 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:10,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-12 16:35:10,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:10,731 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:10,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -372029144, now seen corresponding path program 9 times [2024-09-12 16:35:10,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:10,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395262019] [2024-09-12 16:35:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:11,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:11,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:35:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:12,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:13,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:14,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:15,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:15,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:15,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:16,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:16,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:16,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 23 proven. 99 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-12 16:35:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:16,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395262019] [2024-09-12 16:35:16,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395262019] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:16,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417658344] [2024-09-12 16:35:16,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:35:16,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:16,507 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:35:16,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 16:35:17,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 16:35:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:17,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-09-12 16:35:17,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:17,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:17,703 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 15 treesize of output 1 [2024-09-12 16:35:18,160 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 23 treesize of output 3 [2024-09-12 16:35:18,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:35:18,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:35:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 8 proven. 131 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-12 16:35:18,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:19,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 277 treesize of output 261 [2024-09-12 16:35:19,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 261 treesize of output 245 [2024-09-12 16:35:19,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 245 treesize of output 229 [2024-09-12 16:35:19,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 229 treesize of output 213 [2024-09-12 16:35:19,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 213 treesize of output 197 [2024-09-12 16:35:19,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 197 treesize of output 181 [2024-09-12 16:35:19,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 181 treesize of output 165 [2024-09-12 16:35:19,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 165 treesize of output 149 [2024-09-12 16:35:22,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 94 treesize of output 90 [2024-09-12 16:35:22,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 88 treesize of output 84 [2024-09-12 16:35:22,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 82 treesize of output 78 [2024-09-12 16:35:22,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 76 treesize of output 72 [2024-09-12 16:35:22,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 70 treesize of output 66 [2024-09-12 16:35:22,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 60 [2024-09-12 16:35:22,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 58 treesize of output 54 [2024-09-12 16:35:22,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 90 treesize of output 86 [2024-09-12 16:35:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417658344] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:23,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:23,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2024-09-12 16:35:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69645787] [2024-09-12 16:35:23,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:23,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 16:35:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 16:35:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 16:35:23,276 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 38 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 9 states have call successors, (10), 5 states have call predecessors, (10), 20 states have return successors, (21), 21 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-12 16:35:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:23,523 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-09-12 16:35:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 16:35:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 9 states have call successors, (10), 5 states have call predecessors, (10), 20 states have return successors, (21), 21 states have call predecessors, (21), 9 states have call successors, (21) Word has length 59 [2024-09-12 16:35:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:23,524 INFO L225 Difference]: With dead ends: 45 [2024-09-12 16:35:23,524 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 16:35:23,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 16:35:23,525 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:23,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 131 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:35:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 16:35:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 16:35:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-12 16:35:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-09-12 16:35:23,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 59 [2024-09-12 16:35:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:23,531 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-09-12 16:35:23,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 9 states have call successors, (10), 5 states have call predecessors, (10), 20 states have return successors, (21), 21 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-12 16:35:23,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-09-12 16:35:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 16:35:23,532 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:23,532 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:23,547 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 16:35:23,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:23,733 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1352001478, now seen corresponding path program 9 times [2024-09-12 16:35:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17161212] [2024-09-12 16:35:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:24,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:24,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:35:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:25,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:26,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:26,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:27,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:27,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:27,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:27,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:28,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:28,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 99 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-12 16:35:28,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17161212] [2024-09-12 16:35:28,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17161212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:28,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384056208] [2024-09-12 16:35:28,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 16:35:28,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:28,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:28,142 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:35:28,143 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 16:35:28,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-12 16:35:28,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:28,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-12 16:35:28,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:28,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:28,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:28,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:28,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:29,370 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 23 treesize of output 3 [2024-09-12 16:35:29,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:35:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-09-12 16:35:29,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:30,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 73 treesize of output 69 [2024-09-12 16:35:30,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 206 treesize of output 194 [2024-09-12 16:35:30,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 748 treesize of output 700 [2024-09-12 16:35:30,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 700 treesize of output 652 [2024-09-12 16:35:30,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 652 treesize of output 604 [2024-09-12 16:35:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 604 treesize of output 556 [2024-09-12 16:35:30,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 556 treesize of output 508 [2024-09-12 16:35:30,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 508 treesize of output 460 [2024-09-12 16:35:30,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 460 treesize of output 412 [2024-09-12 16:35:33,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 78 treesize of output 74 [2024-09-12 16:35:33,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 72 treesize of output 68 [2024-09-12 16:35:33,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 66 treesize of output 62 [2024-09-12 16:35:33,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 60 treesize of output 56 [2024-09-12 16:35:33,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 54 treesize of output 50 [2024-09-12 16:35:33,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 48 treesize of output 44 [2024-09-12 16:35:33,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 42 treesize of output 38 [2024-09-12 16:35:33,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 32 [2024-09-12 16:35:33,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384056208] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:33,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:33,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 34 [2024-09-12 16:35:33,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160614311] [2024-09-12 16:35:33,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:33,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 16:35:33,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:33,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 16:35:33,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 16:35:33,971 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 16:35:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:34,144 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-12 16:35:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 16:35:34,144 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) Word has length 60 [2024-09-12 16:35:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:34,145 INFO L225 Difference]: With dead ends: 46 [2024-09-12 16:35:34,145 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 16:35:34,146 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=1450, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 16:35:34,146 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:34,146 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 96 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:35:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 16:35:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-12 16:35:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-12 16:35:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-12 16:35:34,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 60 [2024-09-12 16:35:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:34,153 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-12 16:35:34,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (21), 21 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-12 16:35:34,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:34,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-12 16:35:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-12 16:35:34,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:34,155 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:34,171 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-12 16:35:34,355 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:34,356 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:34,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1924062919, now seen corresponding path program 10 times [2024-09-12 16:35:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982147805] [2024-09-12 16:35:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:35,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:35,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:35:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:37,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:38,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:39,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:40,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:40,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 26 proven. 120 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2024-09-12 16:35:41,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982147805] [2024-09-12 16:35:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982147805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:41,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234906855] [2024-09-12 16:35:41,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:35:41,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:41,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:41,973 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:35:41,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 16:35:43,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:35:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:43,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-09-12 16:35:43,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:43,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:43,471 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 15 treesize of output 1 [2024-09-12 16:35:43,983 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 23 treesize of output 3 [2024-09-12 16:35:44,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:35:44,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:35:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-12 16:35:44,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:45,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 305 treesize of output 289 [2024-09-12 16:35:45,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 289 treesize of output 273 [2024-09-12 16:35:45,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 273 treesize of output 257 [2024-09-12 16:35:45,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 257 treesize of output 241 [2024-09-12 16:35:45,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 241 treesize of output 225 [2024-09-12 16:35:45,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 225 treesize of output 209 [2024-09-12 16:35:45,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 209 treesize of output 193 [2024-09-12 16:35:45,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 193 treesize of output 177 [2024-09-12 16:35:45,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 177 treesize of output 161 [2024-09-12 16:35:48,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 101 treesize of output 97 [2024-09-12 16:35:48,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 95 treesize of output 91 [2024-09-12 16:35:48,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 89 treesize of output 85 [2024-09-12 16:35:48,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 83 treesize of output 79 [2024-09-12 16:35:48,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 77 treesize of output 73 [2024-09-12 16:35:48,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 71 treesize of output 67 [2024-09-12 16:35:48,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 65 treesize of output 61 [2024-09-12 16:35:48,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 55 [2024-09-12 16:35:48,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 88 [2024-09-12 16:35:49,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234906855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:49,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:35:49,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2024-09-12 16:35:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568621030] [2024-09-12 16:35:49,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:35:49,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 16:35:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:35:49,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 16:35:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 16:35:49,290 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-12 16:35:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:35:49,510 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2024-09-12 16:35:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:35:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) Word has length 64 [2024-09-12 16:35:49,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:35:49,512 INFO L225 Difference]: With dead ends: 47 [2024-09-12 16:35:49,512 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 16:35:49,513 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 16:35:49,513 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:35:49,514 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 112 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:35:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 16:35:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 16:35:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-12 16:35:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-09-12 16:35:49,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 64 [2024-09-12 16:35:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:35:49,522 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-09-12 16:35:49,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 8 states have call successors, (9), 4 states have call predecessors, (9), 22 states have return successors, (23), 23 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-12 16:35:49,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-09-12 16:35:49,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-12 16:35:49,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:35:49,523 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:35:49,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-12 16:35:49,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-12 16:35:49,724 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:35:49,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:35:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 483594709, now seen corresponding path program 10 times [2024-09-12 16:35:49,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:35:49,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609675764] [2024-09-12 16:35:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:35:49,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:35:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:50,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:35:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:50,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:35:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:51,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:52,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:53,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:54,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:54,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:35:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:35:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 18 proven. 120 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-12 16:35:55,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:35:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609675764] [2024-09-12 16:35:55,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609675764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:35:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973458514] [2024-09-12 16:35:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 16:35:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:35:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:35:55,754 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:35:55,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 16:35:56,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 16:35:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:35:56,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-12 16:35:56,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:35:56,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:56,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:35:57,232 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 23 treesize of output 3 [2024-09-12 16:35:57,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:35:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-12 16:35:57,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:35:57,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 76 [2024-09-12 16:35:58,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 227 treesize of output 215 [2024-09-12 16:35:58,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 215 treesize of output 203 [2024-09-12 16:35:58,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 191 treesize of output 179 [2024-09-12 16:35:58,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 173 treesize of output 161 [2024-09-12 16:35:58,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 155 treesize of output 143 [2024-09-12 16:35:58,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 137 treesize of output 125 [2024-09-12 16:35:58,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 125 treesize of output 113 [2024-09-12 16:35:58,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 400 treesize of output 352 [2024-09-12 16:35:58,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 352 treesize of output 304 [2024-09-12 16:36:00,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 85 treesize of output 81 [2024-09-12 16:36:00,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 79 treesize of output 75 [2024-09-12 16:36:00,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 73 treesize of output 69 [2024-09-12 16:36:00,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 67 treesize of output 63 [2024-09-12 16:36:00,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 61 treesize of output 57 [2024-09-12 16:36:00,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 55 treesize of output 51 [2024-09-12 16:36:00,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 49 treesize of output 45 [2024-09-12 16:36:00,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 43 treesize of output 39 [2024-09-12 16:36:00,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 33 [2024-09-12 16:36:00,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973458514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:00,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:36:00,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2024-09-12 16:36:00,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9352035] [2024-09-12 16:36:00,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:00,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 16:36:00,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:00,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 16:36:00,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 16:36:00,344 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-12 16:36:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:00,533 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-09-12 16:36:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 16:36:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 65 [2024-09-12 16:36:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:00,535 INFO L225 Difference]: With dead ends: 48 [2024-09-12 16:36:00,535 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 16:36:00,535 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 16:36:00,536 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:00,536 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 97 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:36:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 16:36:00,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 16:36:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-12 16:36:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2024-09-12 16:36:00,541 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 65 [2024-09-12 16:36:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:00,541 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2024-09-12 16:36:00,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 7 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-12 16:36:00,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2024-09-12 16:36:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-12 16:36:00,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:00,542 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:36:00,569 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 16:36:00,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 16:36:00,743 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1448668344, now seen corresponding path program 11 times [2024-09-12 16:36:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:00,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904374294] [2024-09-12 16:36:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:02,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:36:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:02,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:36:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:04,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:05,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:06,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:07,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:08,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:08,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:09,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:09,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:09,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:10,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:10,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 29 proven. 143 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-09-12 16:36:10,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904374294] [2024-09-12 16:36:10,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904374294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:10,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555127273] [2024-09-12 16:36:10,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:36:10,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:10,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:10,261 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:36:10,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 16:36:14,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 16:36:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:36:14,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 237 conjuncts are in the unsatisfiable core [2024-09-12 16:36:14,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:14,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:14,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:15,018 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 15 treesize of output 1 [2024-09-12 16:36:15,551 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 23 treesize of output 3 [2024-09-12 16:36:15,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:36:15,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:36:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 11 proven. 153 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-12 16:36:15,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:17,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 333 treesize of output 317 [2024-09-12 16:36:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 317 treesize of output 301 [2024-09-12 16:36:17,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 301 treesize of output 285 [2024-09-12 16:36:17,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 285 treesize of output 269 [2024-09-12 16:36:17,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 269 treesize of output 253 [2024-09-12 16:36:17,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 253 treesize of output 237 [2024-09-12 16:36:17,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 237 treesize of output 221 [2024-09-12 16:36:17,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 221 treesize of output 205 [2024-09-12 16:36:17,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 205 treesize of output 189 [2024-09-12 16:36:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 189 treesize of output 173 [2024-09-12 16:36:20,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 108 treesize of output 104 [2024-09-12 16:36:20,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 102 treesize of output 98 [2024-09-12 16:36:20,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 96 treesize of output 92 [2024-09-12 16:36:20,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 90 treesize of output 86 [2024-09-12 16:36:20,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 84 treesize of output 80 [2024-09-12 16:36:20,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 78 treesize of output 74 [2024-09-12 16:36:20,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 72 treesize of output 68 [2024-09-12 16:36:20,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 66 treesize of output 62 [2024-09-12 16:36:20,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 60 treesize of output 56 [2024-09-12 16:36:20,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 94 treesize of output 90 [2024-09-12 16:36:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555127273] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:22,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:36:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 39 [2024-09-12 16:36:22,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177051330] [2024-09-12 16:36:22,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:22,714 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-12 16:36:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:22,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-12 16:36:22,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1569, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 16:36:22,716 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-12 16:36:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:22,970 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-09-12 16:36:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 16:36:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) Word has length 69 [2024-09-12 16:36:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:22,971 INFO L225 Difference]: With dead ends: 49 [2024-09-12 16:36:22,972 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 16:36:22,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=441, Invalid=1911, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 16:36:22,973 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:22,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 136 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:36:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 16:36:22,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-12 16:36:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 16:36:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-09-12 16:36:22,981 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 69 [2024-09-12 16:36:22,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:22,982 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-09-12 16:36:22,982 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (9), 4 states have call predecessors, (9), 24 states have return successors, (25), 25 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-12 16:36:22,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:22,982 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-09-12 16:36:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 16:36:22,983 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:22,983 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:36:23,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-12 16:36:23,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:23,184 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:23,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1959048758, now seen corresponding path program 11 times [2024-09-12 16:36:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:23,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527202831] [2024-09-12 16:36:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:24,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:36:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:24,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:36:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:25,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:26,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:27,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:28,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:29,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:29,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:29,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:30,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:30,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:30,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:30,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 20 proven. 143 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2024-09-12 16:36:30,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527202831] [2024-09-12 16:36:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527202831] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869523577] [2024-09-12 16:36:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 16:36:30,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:30,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:30,531 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:36:30,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 16:36:33,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-12 16:36:33,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:36:33,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-09-12 16:36:34,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:34,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:34,565 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 23 treesize of output 3 [2024-09-12 16:36:34,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:36:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2024-09-12 16:36:34,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:35,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 87 treesize of output 83 [2024-09-12 16:36:35,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 248 treesize of output 236 [2024-09-12 16:36:35,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 236 treesize of output 224 [2024-09-12 16:36:35,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 224 treesize of output 212 [2024-09-12 16:36:35,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 212 treesize of output 200 [2024-09-12 16:36:35,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 200 treesize of output 188 [2024-09-12 16:36:35,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 182 treesize of output 170 [2024-09-12 16:36:35,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 164 treesize of output 152 [2024-09-12 16:36:35,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 152 treesize of output 140 [2024-09-12 16:36:35,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 128 treesize of output 116 [2024-09-12 16:36:35,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 116 treesize of output 104 [2024-09-12 16:36:37,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 88 [2024-09-12 16:36:37,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 86 treesize of output 82 [2024-09-12 16:36:37,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 80 treesize of output 76 [2024-09-12 16:36:37,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 74 treesize of output 70 [2024-09-12 16:36:37,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 68 treesize of output 64 [2024-09-12 16:36:37,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 62 treesize of output 58 [2024-09-12 16:36:37,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 56 treesize of output 52 [2024-09-12 16:36:37,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 50 treesize of output 46 [2024-09-12 16:36:37,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 44 treesize of output 40 [2024-09-12 16:36:37,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 38 treesize of output 34 [2024-09-12 16:36:37,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869523577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:37,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:36:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 37 [2024-09-12 16:36:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521929893] [2024-09-12 16:36:37,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:36:37,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 16:36:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:36:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 16:36:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 16:36:37,710 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-12 16:36:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:36:37,880 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2024-09-12 16:36:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 16:36:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) Word has length 70 [2024-09-12 16:36:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:36:37,881 INFO L225 Difference]: With dead ends: 50 [2024-09-12 16:36:37,881 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 16:36:37,882 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=511, Invalid=1651, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 16:36:37,882 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:36:37,882 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 96 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:36:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 16:36:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 16:36:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-12 16:36:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-12 16:36:37,890 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-09-12 16:36:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:36:37,890 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-12 16:36:37,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 7 states have call successors, (8), 3 states have call predecessors, (8), 24 states have return successors, (25), 25 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-12 16:36:37,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-12 16:36:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-12 16:36:37,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:36:37,892 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:36:37,914 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 16:36:38,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 16:36:38,092 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:36:38,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:36:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash 918502793, now seen corresponding path program 12 times [2024-09-12 16:36:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:36:38,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406050251] [2024-09-12 16:36:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:36:38,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:36:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:39,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:36:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:39,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:36:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:41,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:43,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:44,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:45,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:46,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:47,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:47,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:48,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:48,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:48,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:48,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:49,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:36:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:36:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 32 proven. 168 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2024-09-12 16:36:49,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:36:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406050251] [2024-09-12 16:36:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406050251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:36:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299838904] [2024-09-12 16:36:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:36:49,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:36:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:36:49,144 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:36:49,144 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 16:36:51,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 16:36:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:36:51,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 307 conjuncts are in the unsatisfiable core [2024-09-12 16:36:51,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:36:51,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:36:51,486 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 15 treesize of output 1 [2024-09-12 16:36:52,129 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 23 treesize of output 3 [2024-09-12 16:36:52,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 36 treesize of output 24 [2024-09-12 16:36:52,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 28 treesize of output 16 [2024-09-12 16:36:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-12 16:36:52,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:36:54,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 361 treesize of output 345 [2024-09-12 16:36:54,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 345 treesize of output 329 [2024-09-12 16:36:54,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 329 treesize of output 313 [2024-09-12 16:36:54,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 313 treesize of output 297 [2024-09-12 16:36:54,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 297 treesize of output 281 [2024-09-12 16:36:54,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 281 treesize of output 265 [2024-09-12 16:36:54,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 265 treesize of output 249 [2024-09-12 16:36:54,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 249 treesize of output 233 [2024-09-12 16:36:54,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 233 treesize of output 217 [2024-09-12 16:36:54,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 217 treesize of output 201 [2024-09-12 16:36:54,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 201 treesize of output 185 [2024-09-12 16:36:58,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 115 treesize of output 111 [2024-09-12 16:36:58,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 109 treesize of output 105 [2024-09-12 16:36:58,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 103 treesize of output 99 [2024-09-12 16:36:58,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 97 treesize of output 93 [2024-09-12 16:36:58,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 91 treesize of output 87 [2024-09-12 16:36:58,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 85 treesize of output 81 [2024-09-12 16:36:58,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 79 treesize of output 75 [2024-09-12 16:36:58,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 73 treesize of output 69 [2024-09-12 16:36:58,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 67 treesize of output 63 [2024-09-12 16:36:58,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 61 treesize of output 57 [2024-09-12 16:36:58,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 96 treesize of output 92 [2024-09-12 16:37:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299838904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:37:00,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:37:00,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2024-09-12 16:37:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430531681] [2024-09-12 16:37:00,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:37:00,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 16:37:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 16:37:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 16:37:00,259 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-12 16:37:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:37:00,508 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2024-09-12 16:37:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 16:37:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) Word has length 74 [2024-09-12 16:37:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:37:00,509 INFO L225 Difference]: With dead ends: 51 [2024-09-12 16:37:00,509 INFO L226 Difference]: Without dead ends: 49 [2024-09-12 16:37:00,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=498, Invalid=2154, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 16:37:00,510 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:37:00,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:37:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-12 16:37:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-12 16:37:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-12 16:37:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-09-12 16:37:00,518 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 74 [2024-09-12 16:37:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:37:00,518 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-09-12 16:37:00,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 8 states have call successors, (9), 4 states have call predecessors, (9), 26 states have return successors, (27), 27 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-12 16:37:00,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-09-12 16:37:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-12 16:37:00,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:37:00,519 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:37:00,540 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 16:37:00,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 16:37:00,720 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:37:00,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1591181435, now seen corresponding path program 12 times [2024-09-12 16:37:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:37:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559609591] [2024-09-12 16:37:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:00,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:37:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:02,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:37:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:02,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:37:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:03,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:05,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:06,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:07,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:07,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:08,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:08,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-12 16:37:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:37:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559609591] [2024-09-12 16:37:09,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559609591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:37:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384908834] [2024-09-12 16:37:09,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 16:37:09,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:37:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:37:09,598 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 16:37:09,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 16:37:11,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-12 16:37:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:37:11,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 303 conjuncts are in the unsatisfiable core [2024-09-12 16:37:11,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:37:11,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:11,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:11,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:11,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 19 [2024-09-12 16:37:12,230 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 15 treesize of output 1 [2024-09-12 16:37:12,797 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 23 treesize of output 3 [2024-09-12 16:37:12,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 29 treesize of output 21 [2024-09-12 16:37:12,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 22 treesize of output 10 [2024-09-12 16:37:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 10 proven. 268 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-12 16:37:12,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:37:14,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 269 treesize of output 257 [2024-09-12 16:37:14,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 257 treesize of output 245 [2024-09-12 16:37:14,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 245 treesize of output 233 [2024-09-12 16:37:14,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 233 treesize of output 221 [2024-09-12 16:37:14,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 221 treesize of output 209 [2024-09-12 16:37:14,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 203 treesize of output 191 [2024-09-12 16:37:14,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 179 treesize of output 167 [2024-09-12 16:37:15,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 161 treesize of output 149 [2024-09-12 16:37:15,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 149 treesize of output 137 [2024-09-12 16:37:15,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 131 treesize of output 119 [2024-09-12 16:37:16,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 89 treesize of output 77 [2024-09-12 16:37:18,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 93 treesize of output 89 [2024-09-12 16:37:18,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 87 treesize of output 83 [2024-09-12 16:37:18,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 81 treesize of output 77 [2024-09-12 16:37:18,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 75 treesize of output 71 [2024-09-12 16:37:18,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 69 treesize of output 65 [2024-09-12 16:37:18,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 63 treesize of output 59 [2024-09-12 16:37:18,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 57 treesize of output 53 [2024-09-12 16:37:18,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 51 treesize of output 47 [2024-09-12 16:37:18,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 45 treesize of output 41 [2024-09-12 16:37:18,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 39 treesize of output 35 [2024-09-12 16:37:18,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384908834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:37:18,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:37:18,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 47 [2024-09-12 16:37:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720396229] [2024-09-12 16:37:18,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:37:18,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-12 16:37:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:37:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-12 16:37:18,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=2077, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 16:37:18,966 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 47 states, 40 states have (on average 1.3) internal successors, (52), 43 states have internal predecessors, (52), 9 states have call successors, (10), 5 states have call predecessors, (10), 27 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-12 16:37:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:37:19,314 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-12 16:37:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 16:37:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 40 states have (on average 1.3) internal successors, (52), 43 states have internal predecessors, (52), 9 states have call successors, (10), 5 states have call predecessors, (10), 27 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) Word has length 75 [2024-09-12 16:37:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:37:19,316 INFO L225 Difference]: With dead ends: 52 [2024-09-12 16:37:19,316 INFO L226 Difference]: Without dead ends: 47 [2024-09-12 16:37:19,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=761, Invalid=2779, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 16:37:19,320 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:37:19,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 111 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:37:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-12 16:37:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-12 16:37:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-12 16:37:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-09-12 16:37:19,331 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-09-12 16:37:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:37:19,331 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-09-12 16:37:19,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 40 states have (on average 1.3) internal successors, (52), 43 states have internal predecessors, (52), 9 states have call successors, (10), 5 states have call predecessors, (10), 27 states have return successors, (27), 27 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-12 16:37:19,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-09-12 16:37:19,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-12 16:37:19,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:37:19,332 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:37:19,359 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-12 16:37:19,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 16:37:19,533 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:37:19,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:37:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2044587960, now seen corresponding path program 13 times [2024-09-12 16:37:19,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:37:19,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615204394] [2024-09-12 16:37:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:37:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:37:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:21,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:37:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:21,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 16:37:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:23,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:25,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:27,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:37:28,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-12 16:37:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat