./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.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 1d5fa637 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_nla-digbench/recursified_cohencu-ll.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 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a --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-1d5fa63-m [2024-09-13 09:55:06,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 09:55:06,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 09:55:06,389 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 09:55:06,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 09:55:06,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 09:55:06,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 09:55:06,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 09:55:06,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 09:55:06,417 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 09:55:06,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 09:55:06,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 09:55:06,418 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 09:55:06,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 09:55:06,419 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 09:55:06,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 09:55:06,422 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 09:55:06,422 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 09:55:06,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 09:55:06,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 09:55:06,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 09:55:06,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 09:55:06,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 09:55:06,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 09:55:06,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 09:55:06,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 09:55:06,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 09:55:06,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 09:55:06,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 09:55:06,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 09:55:06,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 09:55:06,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 09:55:06,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:55:06,425 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 09:55:06,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 09:55:06,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 09:55:06,428 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 09:55:06,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 09:55:06,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 09:55:06,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 09:55:06,429 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 09:55:06,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 09:55:06,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260777f6a7be1f16cc330a008300c11ebdea8f1cf9d8e96a0325274fd8fd5b2a Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 09:55:06,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 09:55:06,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 09:55:06,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 09:55:06,670 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 09:55:06,670 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 09:55:06,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-13 09:55:07,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 09:55:08,066 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 09:55:08,069 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohencu-ll.c [2024-09-13 09:55:08,076 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7cbf4fb39/4f714f9146394a5faa304a7d7adfc9b5/FLAG84aa8a704 [2024-09-13 09:55:08,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7cbf4fb39/4f714f9146394a5faa304a7d7adfc9b5 [2024-09-13 09:55:08,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 09:55:08,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 09:55:08,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 09:55:08,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 09:55:08,097 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 09:55:08,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45bf056c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08, skipping insertion in model container [2024-09-13 09:55:08,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,115 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 09:55:08,232 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_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-13 09:55:08,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:55:08,259 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 09:55:08,268 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_nla-digbench/recursified_cohencu-ll.c[1124,1137] [2024-09-13 09:55:08,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 09:55:08,291 INFO L204 MainTranslator]: Completed translation [2024-09-13 09:55:08,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08 WrapperNode [2024-09-13 09:55:08,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 09:55:08,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 09:55:08,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 09:55:08,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 09:55:08,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,309 INFO L138 Inliner]: procedures = 16, calls = 99, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 09:55:08,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 09:55:08,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 09:55:08,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 09:55:08,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 09:55:08,341 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,367 INFO L175 MemorySlicer]: Split 66 memory accesses to 6 slices as follows [2, 21, 11, 15, 12, 5]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 9 writes are split as follows [0, 2, 2, 2, 2, 1]. [2024-09-13 09:55:08,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,377 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,379 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,381 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 09:55:08,382 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 09:55:08,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 09:55:08,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 09:55:08,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (1/1) ... [2024-09-13 09:55:08,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 09:55:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:08,415 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) [2024-09-13 09:55:08,418 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 [2024-09-13 09:55:08,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 09:55:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 09:55:08,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 09:55:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 09:55:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 09:55:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 09:55:08,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 09:55:08,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 09:55:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 09:55:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 09:55:08,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 09:55:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_41_0 [2024-09-13 09:55:08,463 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_41_0 [2024-09-13 09:55:08,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 09:55:08,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 09:55:08,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 09:55:08,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 09:55:08,541 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 09:55:08,543 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 09:55:08,747 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 09:55:08,747 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 09:55:08,761 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 09:55:08,762 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 09:55:08,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:55:08 BoogieIcfgContainer [2024-09-13 09:55:08,762 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 09:55:08,764 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 09:55:08,764 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 09:55:08,766 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 09:55:08,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 09:55:08" (1/3) ... [2024-09-13 09:55:08,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37da48be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:55:08, skipping insertion in model container [2024-09-13 09:55:08,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 09:55:08" (2/3) ... [2024-09-13 09:55:08,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37da48be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 09:55:08, skipping insertion in model container [2024-09-13 09:55:08,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 09:55:08" (3/3) ... [2024-09-13 09:55:08,768 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohencu-ll.c [2024-09-13 09:55:08,781 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 09:55:08,781 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 09:55:08,827 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 09:55:08,833 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;@2f583c27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 09:55:08,833 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 09:55:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-13 09:55:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 09:55:08,841 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:08,842 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:08,842 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:08,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:08,846 INFO L85 PathProgramCache]: Analyzing trace with hash 775072714, now seen corresponding path program 1 times [2024-09-13 09:55:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:08,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688941577] [2024-09-13 09:55:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:08,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:09,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:55:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:55:09,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688941577] [2024-09-13 09:55:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688941577] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:55:09,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:55:09,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:55:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433291578] [2024-09-13 09:55:09,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:55:09,427 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:55:09,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:55:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:55:09,497 INFO L87 Difference]: Start difference. First operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:55:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:09,713 INFO L93 Difference]: Finished difference Result 102 states and 152 transitions. [2024-09-13 09:55:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:55:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-13 09:55:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:09,722 INFO L225 Difference]: With dead ends: 102 [2024-09-13 09:55:09,722 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 09:55:09,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:55:09,730 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:09,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 231 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:55:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 09:55:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-09-13 09:55:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-13 09:55:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-09-13 09:55:09,778 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 12 [2024-09-13 09:55:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:09,779 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-09-13 09:55:09,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 09:55:09,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-09-13 09:55:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 09:55:09,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:09,781 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:09,782 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 09:55:09,782 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:09,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1351765856, now seen corresponding path program 1 times [2024-09-13 09:55:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:09,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197410029] [2024-09-13 09:55:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:09,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375900584] [2024-09-13 09:55:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:09,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:09,815 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) [2024-09-13 09:55:09,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 09:55:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:09,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 09:55:09,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:09,964 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 11 treesize of output 7 [2024-09-13 09:55:09,968 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 11 treesize of output 7 [2024-09-13 09:55:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:55:10,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 09:55:10,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:10,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197410029] [2024-09-13 09:55:10,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375900584] [2024-09-13 09:55:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375900584] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:55:10,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:55:10,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 10 [2024-09-13 09:55:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378910676] [2024-09-13 09:55:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:55:10,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:55:10,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:55:10,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:55:10,266 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:55:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:10,452 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-09-13 09:55:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:55:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-13 09:55:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:10,455 INFO L225 Difference]: With dead ends: 66 [2024-09-13 09:55:10,456 INFO L226 Difference]: Without dead ends: 64 [2024-09-13 09:55:10,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:55:10,457 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:10,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:55:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-13 09:55:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2024-09-13 09:55:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2024-09-13 09:55:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-09-13 09:55:10,476 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 18 [2024-09-13 09:55:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:10,477 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-09-13 09:55:10,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 09:55:10,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-09-13 09:55:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 09:55:10,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:10,479 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:10,495 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 09:55:10,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:10,683 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:10,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1982254220, now seen corresponding path program 1 times [2024-09-13 09:55:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010682379] [2024-09-13 09:55:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:10,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856372665] [2024-09-13 09:55:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:10,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:10,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:10,723 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) [2024-09-13 09:55:10,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 09:55:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:10,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-13 09:55:10,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:10,817 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 11 treesize of output 7 [2024-09-13 09:55:10,820 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 11 treesize of output 7 [2024-09-13 09:55:10,827 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 11 treesize of output 7 [2024-09-13 09:55:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 09:55:11,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 09:55:11,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010682379] [2024-09-13 09:55:11,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:11,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856372665] [2024-09-13 09:55:11,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856372665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:55:11,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:55:11,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2024-09-13 09:55:11,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46813948] [2024-09-13 09:55:11,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:55:11,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 09:55:11,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 09:55:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-13 09:55:11,369 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 09:55:15,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-13 09:55:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:15,944 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-13 09:55:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 09:55:15,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-09-13 09:55:15,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:15,945 INFO L225 Difference]: With dead ends: 87 [2024-09-13 09:55:15,945 INFO L226 Difference]: Without dead ends: 85 [2024-09-13 09:55:15,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2024-09-13 09:55:15,946 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:15,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 170 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 411 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-13 09:55:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-13 09:55:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2024-09-13 09:55:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-13 09:55:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2024-09-13 09:55:15,961 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 24 [2024-09-13 09:55:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:15,962 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2024-09-13 09:55:15,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 09:55:15,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2024-09-13 09:55:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 09:55:15,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:15,963 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:15,979 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 09:55:16,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:16,168 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1760067974, now seen corresponding path program 1 times [2024-09-13 09:55:16,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:16,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582836384] [2024-09-13 09:55:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107533815] [2024-09-13 09:55:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:16,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:16,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:16,186 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) [2024-09-13 09:55:16,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 09:55:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:16,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 09:55:16,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:16,268 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 11 treesize of output 7 [2024-09-13 09:55:16,271 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 11 treesize of output 7 [2024-09-13 09:55:16,276 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 11 treesize of output 7 [2024-09-13 09:55:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:55:16,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:55:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582836384] [2024-09-13 09:55:16,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107533815] [2024-09-13 09:55:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107533815] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:55:16,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:55:16,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-13 09:55:16,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395432574] [2024-09-13 09:55:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:55:16,723 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:55:16,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:16,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:55:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:55:16,726 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:55:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:17,469 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2024-09-13 09:55:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:55:17,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-13 09:55:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:17,471 INFO L225 Difference]: With dead ends: 89 [2024-09-13 09:55:17,471 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 09:55:17,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:55:17,472 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:17,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 188 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:55:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 09:55:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-13 09:55:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 53 states have internal predecessors, (55), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2024-09-13 09:55:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2024-09-13 09:55:17,525 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 30 [2024-09-13 09:55:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:17,525 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2024-09-13 09:55:17,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:55:17,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2024-09-13 09:55:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 09:55:17,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:17,527 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:17,544 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 09:55:17,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:17,732 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1652310806, now seen corresponding path program 1 times [2024-09-13 09:55:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:17,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129315286] [2024-09-13 09:55:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:17,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741452175] [2024-09-13 09:55:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:17,751 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) [2024-09-13 09:55:17,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 09:55:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:17,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 09:55:17,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:17,828 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 11 treesize of output 7 [2024-09-13 09:55:17,831 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 11 treesize of output 7 [2024-09-13 09:55:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:55:18,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:55:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129315286] [2024-09-13 09:55:18,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:18,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741452175] [2024-09-13 09:55:18,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741452175] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 09:55:18,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:55:18,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-13 09:55:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499205710] [2024-09-13 09:55:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:55:18,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:55:18,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:55:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 09:55:18,268 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:55:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:18,782 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2024-09-13 09:55:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:55:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-13 09:55:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:18,785 INFO L225 Difference]: With dead ends: 101 [2024-09-13 09:55:18,785 INFO L226 Difference]: Without dead ends: 99 [2024-09-13 09:55:18,785 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-13 09:55:18,786 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 22 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:18,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 168 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 09:55:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-13 09:55:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-13 09:55:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 60 states have internal predecessors, (62), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (25), 24 states have call predecessors, (25), 23 states have call successors, (25) [2024-09-13 09:55:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-13 09:55:18,808 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 36 [2024-09-13 09:55:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:18,808 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-13 09:55:18,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-13 09:55:18,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-13 09:55:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:55:18,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:18,810 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:18,822 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 09:55:19,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:19,014 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:19,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 982058431, now seen corresponding path program 1 times [2024-09-13 09:55:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:19,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301123497] [2024-09-13 09:55:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:55:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:55:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:55:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 09:55:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:55:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:55:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:55:19,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301123497] [2024-09-13 09:55:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301123497] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:55:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846289152] [2024-09-13 09:55:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:19,648 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) [2024-09-13 09:55:19,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 09:55:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:19,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-13 09:55:19,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:19,736 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 11 treesize of output 7 [2024-09-13 09:55:19,740 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 11 treesize of output 7 [2024-09-13 09:55:20,037 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 19 treesize of output 11 [2024-09-13 09:55:20,042 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 19 treesize of output 11 [2024-09-13 09:55:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:55:20,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:55:24,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846289152] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:55:24,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:55:24,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 10] total 22 [2024-09-13 09:55:24,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178728167] [2024-09-13 09:55:24,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:55:24,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 09:55:24,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 09:55:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2024-09-13 09:55:24,548 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (24), 7 states have call predecessors, (24), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-13 09:55:29,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-13 09:55:33,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-09-13 09:55:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:35,364 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2024-09-13 09:55:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 09:55:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (24), 7 states have call predecessors, (24), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 46 [2024-09-13 09:55:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:35,366 INFO L225 Difference]: With dead ends: 125 [2024-09-13 09:55:35,366 INFO L226 Difference]: Without dead ends: 123 [2024-09-13 09:55:35,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=153, Invalid=776, Unknown=1, NotChecked=0, Total=930 [2024-09-13 09:55:35,366 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:35,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 185 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2024-09-13 09:55:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-13 09:55:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-09-13 09:55:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 32 states have call successors, (32), 14 states have call predecessors, (32), 16 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-13 09:55:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2024-09-13 09:55:35,394 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 46 [2024-09-13 09:55:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:35,394 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2024-09-13 09:55:35,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 9 states have call successors, (24), 7 states have call predecessors, (24), 4 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-13 09:55:35,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2024-09-13 09:55:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 09:55:35,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:35,396 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:35,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 09:55:35,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 09:55:35,597 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:35,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1659555766, now seen corresponding path program 1 times [2024-09-13 09:55:35,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:35,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515733473] [2024-09-13 09:55:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:35,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:55:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:35,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:55:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:55:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:55:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:55:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 09:55:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:55:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:55:36,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515733473] [2024-09-13 09:55:36,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515733473] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 09:55:36,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 09:55:36,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 09:55:36,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552668575] [2024-09-13 09:55:36,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 09:55:36,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:55:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:36,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:55:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-13 09:55:36,103 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 09:55:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:36,914 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2024-09-13 09:55:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 09:55:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-09-13 09:55:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:36,916 INFO L225 Difference]: With dead ends: 127 [2024-09-13 09:55:36,916 INFO L226 Difference]: Without dead ends: 125 [2024-09-13 09:55:36,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-13 09:55:36,917 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:36,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 102 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:55:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-13 09:55:36,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-13 09:55:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 78 states have internal predecessors, (80), 32 states have call successors, (32), 15 states have call predecessors, (32), 17 states have return successors, (35), 31 states have call predecessors, (35), 29 states have call successors, (35) [2024-09-13 09:55:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2024-09-13 09:55:36,978 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 46 [2024-09-13 09:55:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:36,978 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2024-09-13 09:55:36,978 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 09:55:36,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2024-09-13 09:55:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 09:55:36,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:36,980 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:36,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-13 09:55:36,980 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:36,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash -279405163, now seen corresponding path program 2 times [2024-09-13 09:55:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478381545] [2024-09-13 09:55:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:37,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934191687] [2024-09-13 09:55:37,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:55:37,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:37,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:37,020 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) [2024-09-13 09:55:37,023 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 09:55:37,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:55:37,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:55:37,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-09-13 09:55:37,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:37,181 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 11 treesize of output 7 [2024-09-13 09:55:37,216 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 11 treesize of output 7 [2024-09-13 09:55:37,232 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 11 treesize of output 7 [2024-09-13 09:55:38,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-13 09:55:38,853 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 19 treesize of output 11 [2024-09-13 09:55:38,863 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 19 treesize of output 11 [2024-09-13 09:55:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:55:39,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 09:55:40,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478381545] [2024-09-13 09:55:40,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:40,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934191687] [2024-09-13 09:55:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934191687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:55:40,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:55:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2024-09-13 09:55:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051104747] [2024-09-13 09:55:40,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:55:40,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:55:40,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:55:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-13 09:55:40,640 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-13 09:55:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:46,195 INFO L93 Difference]: Finished difference Result 163 states and 185 transitions. [2024-09-13 09:55:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-13 09:55:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 52 [2024-09-13 09:55:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:46,196 INFO L225 Difference]: With dead ends: 163 [2024-09-13 09:55:46,196 INFO L226 Difference]: Without dead ends: 161 [2024-09-13 09:55:46,197 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=308, Invalid=1762, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 09:55:46,197 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 118 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:46,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 239 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-13 09:55:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-13 09:55:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2024-09-13 09:55:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 96 states have (on average 1.0625) internal successors, (102), 99 states have internal predecessors, (102), 38 states have call successors, (38), 20 states have call predecessors, (38), 22 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:55:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2024-09-13 09:55:46,245 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 52 [2024-09-13 09:55:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:46,246 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2024-09-13 09:55:46,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 20 states have internal predecessors, (43), 11 states have call successors, (20), 8 states have call predecessors, (20), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-13 09:55:46,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2024-09-13 09:55:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 09:55:46,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:46,247 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:46,260 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 09:55:46,447 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 [2024-09-13 09:55:46,448 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:46,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1573894041, now seen corresponding path program 1 times [2024-09-13 09:55:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543659087] [2024-09-13 09:55:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:46,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420417133] [2024-09-13 09:55:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:46,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:46,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:46,468 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) [2024-09-13 09:55:46,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 09:55:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:46,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 09:55:46,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:46,570 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 11 treesize of output 7 [2024-09-13 09:55:46,585 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 11 treesize of output 7 [2024-09-13 09:55:46,601 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 [2024-09-13 09:55:47,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 09:55:47,940 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 7 treesize of output 3 [2024-09-13 09:55:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 09:55:48,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543659087] [2024-09-13 09:55:48,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420417133] [2024-09-13 09:55:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420417133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:55:48,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:55:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 09:55:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875299500] [2024-09-13 09:55:48,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:55:48,501 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 09:55:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 09:55:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-09-13 09:55:48,502 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:55:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:51,917 INFO L93 Difference]: Finished difference Result 165 states and 186 transitions. [2024-09-13 09:55:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 09:55:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-09-13 09:55:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:51,919 INFO L225 Difference]: With dead ends: 165 [2024-09-13 09:55:51,919 INFO L226 Difference]: Without dead ends: 163 [2024-09-13 09:55:51,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 09:55:51,920 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 82 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:51,920 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 77 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 1.6s Time] [2024-09-13 09:55:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-13 09:55:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2024-09-13 09:55:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 102 states have internal predecessors, (105), 38 states have call successors, (38), 21 states have call predecessors, (38), 23 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:55:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-09-13 09:55:51,967 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 52 [2024-09-13 09:55:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:51,967 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-09-13 09:55:51,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 09:55:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-09-13 09:55:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 09:55:51,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:51,969 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:51,983 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 09:55:52,172 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 [2024-09-13 09:55:52,173 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:52,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1781053975, now seen corresponding path program 3 times [2024-09-13 09:55:52,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782164005] [2024-09-13 09:55:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841838302] [2024-09-13 09:55:52,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:55:52,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:52,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:52,201 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) [2024-09-13 09:55:52,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 09:55:52,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 09:55:52,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:55:52,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-13 09:55:52,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:52,310 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 11 treesize of output 7 [2024-09-13 09:55:52,324 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 11 treesize of output 7 [2024-09-13 09:55:52,338 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 11 treesize of output 7 [2024-09-13 09:55:53,548 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 19 treesize of output 11 [2024-09-13 09:55:53,563 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 19 treesize of output 11 [2024-09-13 09:55:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 09:55:54,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:55:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:55:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:55:55,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782164005] [2024-09-13 09:55:55,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:55:55,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841838302] [2024-09-13 09:55:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841838302] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:55:55,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:55:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-09-13 09:55:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653959178] [2024-09-13 09:55:55,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:55:55,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 09:55:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:55:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 09:55:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-09-13 09:55:55,441 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 09:55:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:55:59,214 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-09-13 09:55:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:55:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-13 09:55:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:55:59,220 INFO L225 Difference]: With dead ends: 171 [2024-09-13 09:55:59,220 INFO L226 Difference]: Without dead ends: 169 [2024-09-13 09:55:59,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-09-13 09:55:59,221 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 95 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:55:59,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 498 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-13 09:55:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-13 09:55:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2024-09-13 09:55:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 38 states have call successors, (38), 22 states have call predecessors, (38), 24 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:55:59,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2024-09-13 09:55:59,315 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 58 [2024-09-13 09:55:59,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:55:59,316 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2024-09-13 09:55:59,316 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (22), 9 states have call predecessors, (22), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 09:55:59,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2024-09-13 09:55:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 09:55:59,316 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:55:59,317 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:55:59,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 09:55:59,517 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 [2024-09-13 09:55:59,517 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:55:59,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:55:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831102, now seen corresponding path program 1 times [2024-09-13 09:55:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:55:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607455109] [2024-09-13 09:55:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:55:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:55:59,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935684032] [2024-09-13 09:55:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:55:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:55:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:55:59,539 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) [2024-09-13 09:55:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 09:55:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:55:59,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 09:55:59,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:55:59,648 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 11 treesize of output 7 [2024-09-13 09:55:59,666 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 11 treesize of output 7 [2024-09-13 09:55:59,684 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 48 treesize of output 35 [2024-09-13 09:55:59,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:55:59,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:56:43,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 15 [2024-09-13 09:56:58,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:56:58,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 72 [2024-09-13 09:56:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 09:56:58,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:56:59,433 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 29 treesize of output 21 [2024-09-13 09:57:00,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607455109] [2024-09-13 09:57:00,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:57:00,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935684032] [2024-09-13 09:57:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935684032] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:57:00,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:57:00,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 09:57:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793853242] [2024-09-13 09:57:00,235 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:57:00,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 09:57:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:57:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 09:57:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=469, Unknown=5, NotChecked=0, Total=552 [2024-09-13 09:57:00,236 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 09:57:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:57:05,703 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2024-09-13 09:57:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 09:57:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2024-09-13 09:57:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:57:05,705 INFO L225 Difference]: With dead ends: 173 [2024-09-13 09:57:05,705 INFO L226 Difference]: Without dead ends: 171 [2024-09-13 09:57:05,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=256, Invalid=1461, Unknown=5, NotChecked=0, Total=1722 [2024-09-13 09:57:05,705 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 72 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:57:05,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 80 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 562 Invalid, 4 Unknown, 0 Unchecked, 2.5s Time] [2024-09-13 09:57:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-13 09:57:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2024-09-13 09:57:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 38 states have call successors, (38), 23 states have call predecessors, (38), 25 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:57:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 189 transitions. [2024-09-13 09:57:05,798 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 189 transitions. Word has length 58 [2024-09-13 09:57:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:57:05,799 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 189 transitions. [2024-09-13 09:57:05,799 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 6 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-13 09:57:05,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 189 transitions. [2024-09-13 09:57:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-13 09:57:05,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:57:05,802 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:57:05,820 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 09:57:06,006 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 [2024-09-13 09:57:06,007 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:57:06,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1539975227, now seen corresponding path program 4 times [2024-09-13 09:57:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:57:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745050787] [2024-09-13 09:57:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:57:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:57:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184471857] [2024-09-13 09:57:06,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:57:06,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:57:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:57:06,039 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) [2024-09-13 09:57:06,039 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 09:57:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:57:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:57:06,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-09-13 09:57:06,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:57:06,165 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 11 treesize of output 7 [2024-09-13 09:57:06,183 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 11 treesize of output 7 [2024-09-13 09:57:06,198 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 11 treesize of output 7 [2024-09-13 09:57:06,218 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 11 treesize of output 7 [2024-09-13 09:57:06,533 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 7 treesize of output 3 [2024-09-13 09:57:07,746 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-13 09:57:07,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-13 09:57:07,805 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-13 09:57:07,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-13 09:57:07,903 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-13 09:57:07,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-13 09:57:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:57:09,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:57:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-13 09:57:15,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745050787] [2024-09-13 09:57:15,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:57:15,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184471857] [2024-09-13 09:57:15,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184471857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:57:15,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:57:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2024-09-13 09:57:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623866415] [2024-09-13 09:57:15,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:57:15,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 09:57:15,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:57:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 09:57:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=656, Unknown=1, NotChecked=0, Total=756 [2024-09-13 09:57:15,368 INFO L87 Difference]: Start difference. First operand 169 states and 189 transitions. Second operand has 28 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (24), 9 states have call predecessors, (24), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-13 09:57:26,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 09:57:34,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-13 09:57:38,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 09:57:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:57:39,783 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2024-09-13 09:57:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 09:57:39,784 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (24), 9 states have call predecessors, (24), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 64 [2024-09-13 09:57:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:57:39,785 INFO L225 Difference]: With dead ends: 183 [2024-09-13 09:57:39,785 INFO L226 Difference]: Without dead ends: 181 [2024-09-13 09:57:39,786 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=333, Invalid=1921, Unknown=2, NotChecked=0, Total=2256 [2024-09-13 09:57:39,786 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 154 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:57:39,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 293 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1036 Invalid, 2 Unknown, 0 Unchecked, 15.4s Time] [2024-09-13 09:57:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-13 09:57:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2024-09-13 09:57:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 111 states have (on average 1.054054054054054) internal successors, (117), 114 states have internal predecessors, (117), 38 states have call successors, (38), 25 states have call predecessors, (38), 27 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:57:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2024-09-13 09:57:39,873 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 64 [2024-09-13 09:57:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:57:39,873 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2024-09-13 09:57:39,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (24), 9 states have call predecessors, (24), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-09-13 09:57:39,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2024-09-13 09:57:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-13 09:57:39,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:57:39,874 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:57:39,887 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 09:57:40,078 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 [2024-09-13 09:57:40,079 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:57:40,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:40,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1703546843, now seen corresponding path program 1 times [2024-09-13 09:57:40,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:57:40,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126312032] [2024-09-13 09:57:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:57:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:57:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670871829] [2024-09-13 09:57:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:57:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:57:40,101 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) [2024-09-13 09:57:40,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 09:57:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:40,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 09:57:40,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:57:40,237 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 11 treesize of output 7 [2024-09-13 09:57:40,256 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 11 treesize of output 7 [2024-09-13 09:57:40,272 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 11 treesize of output 7 [2024-09-13 09:57:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-13 09:57:41,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:57:43,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126312032] [2024-09-13 09:57:43,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:57:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670871829] [2024-09-13 09:57:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670871829] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:57:43,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:57:43,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 09:57:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088082972] [2024-09-13 09:57:43,689 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:57:43,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 09:57:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:57:43,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 09:57:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-13 09:57:43,690 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-13 09:57:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:57:45,506 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2024-09-13 09:57:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 09:57:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-13 09:57:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:57:45,508 INFO L225 Difference]: With dead ends: 185 [2024-09-13 09:57:45,509 INFO L226 Difference]: Without dead ends: 183 [2024-09-13 09:57:45,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-13 09:57:45,513 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 42 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:57:45,513 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 107 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 304 Invalid, 3 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 09:57:45,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-09-13 09:57:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2024-09-13 09:57:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 114 states have (on average 1.0526315789473684) internal successors, (120), 117 states have internal predecessors, (120), 38 states have call successors, (38), 26 states have call predecessors, (38), 28 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:57:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 198 transitions. [2024-09-13 09:57:45,625 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 198 transitions. Word has length 64 [2024-09-13 09:57:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:57:45,625 INFO L474 AbstractCegarLoop]: Abstraction has 181 states and 198 transitions. [2024-09-13 09:57:45,625 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-13 09:57:45,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 198 transitions. [2024-09-13 09:57:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-13 09:57:45,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:57:45,627 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:57:45,642 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 09:57:45,830 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 [2024-09-13 09:57:45,831 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:57:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -767700430, now seen corresponding path program 1 times [2024-09-13 09:57:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:57:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305106866] [2024-09-13 09:57:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:57:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:57:45,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937347204] [2024-09-13 09:57:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:45,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:57:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:57:45,862 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) [2024-09-13 09:57:45,866 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 09:57:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:45,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 09:57:45,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:57:45,981 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 11 treesize of output 7 [2024-09-13 09:57:45,999 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 11 treesize of output 7 [2024-09-13 09:57:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 09:57:47,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:57:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305106866] [2024-09-13 09:57:47,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:57:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937347204] [2024-09-13 09:57:47,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937347204] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:57:47,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:57:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-13 09:57:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900279342] [2024-09-13 09:57:47,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:57:47,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:57:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:57:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:57:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:57:47,797 INFO L87 Difference]: Start difference. First operand 181 states and 198 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:57:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:57:49,119 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2024-09-13 09:57:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 09:57:49,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2024-09-13 09:57:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:57:49,121 INFO L225 Difference]: With dead ends: 189 [2024-09-13 09:57:49,121 INFO L226 Difference]: Without dead ends: 185 [2024-09-13 09:57:49,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:57:49,122 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:57:49,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 98 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 230 Invalid, 3 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 09:57:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-09-13 09:57:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2024-09-13 09:57:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 116 states have (on average 1.043103448275862) internal successors, (121), 118 states have internal predecessors, (121), 38 states have call successors, (38), 27 states have call predecessors, (38), 28 states have return successors, (40), 37 states have call predecessors, (40), 34 states have call successors, (40) [2024-09-13 09:57:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 199 transitions. [2024-09-13 09:57:49,222 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 199 transitions. Word has length 70 [2024-09-13 09:57:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:57:49,222 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 199 transitions. [2024-09-13 09:57:49,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 09:57:49,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 199 transitions. [2024-09-13 09:57:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-13 09:57:49,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:57:49,223 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:57:49,237 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 09:57:49,424 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 [2024-09-13 09:57:49,424 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:57:49,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash 593297479, now seen corresponding path program 1 times [2024-09-13 09:57:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:57:49,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813581281] [2024-09-13 09:57:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:57:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:57:49,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646272969] [2024-09-13 09:57:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:49,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:57:49,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:57:49,472 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) [2024-09-13 09:57:49,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 09:57:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:49,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 09:57:49,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:57:49,589 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 11 treesize of output 7 [2024-09-13 09:57:49,611 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 11 treesize of output 7 [2024-09-13 09:57:49,633 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 11 treesize of output 7 [2024-09-13 09:57:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-13 09:57:51,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:57:52,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813581281] [2024-09-13 09:57:52,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:57:52,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646272969] [2024-09-13 09:57:52,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646272969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:57:52,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:57:52,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-13 09:57:52,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769297352] [2024-09-13 09:57:52,090 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:57:52,090 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 09:57:52,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:57:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 09:57:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-13 09:57:52,091 INFO L87 Difference]: Start difference. First operand 183 states and 199 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 09:57:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:57:53,198 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2024-09-13 09:57:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 09:57:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 76 [2024-09-13 09:57:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:57:53,201 INFO L225 Difference]: With dead ends: 185 [2024-09-13 09:57:53,202 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 09:57:53,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-13 09:57:53,202 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:57:53,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 228 Invalid, 3 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 09:57:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 09:57:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-09-13 09:57:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 94 states have internal predecessors, (96), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-13 09:57:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 162 transitions. [2024-09-13 09:57:53,280 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 162 transitions. Word has length 76 [2024-09-13 09:57:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:57:53,280 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 162 transitions. [2024-09-13 09:57:53,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 09:57:53,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:53,280 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 162 transitions. [2024-09-13 09:57:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-13 09:57:53,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:57:53,281 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:57:53,294 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 09:57:53,483 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 [2024-09-13 09:57:53,483 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:57:53,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:57:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 394387029, now seen corresponding path program 1 times [2024-09-13 09:57:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:57:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364941842] [2024-09-13 09:57:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:57:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:57:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 09:57:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:57:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:57:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:57:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 09:57:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:57:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:54,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-13 09:57:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 09:57:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-13 09:57:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-13 09:57:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 09:57:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 09:57:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-13 09:57:55,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:57:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364941842] [2024-09-13 09:57:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364941842] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:57:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560666862] [2024-09-13 09:57:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:57:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:57:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:57:55,105 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) [2024-09-13 09:57:55,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 09:57:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:57:55,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-13 09:57:55,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:57:55,230 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 11 treesize of output 7 [2024-09-13 09:57:55,246 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 11 treesize of output 7 [2024-09-13 09:57:59,500 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 19 treesize of output 11 [2024-09-13 09:57:59,520 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-13 09:57:59,521 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 19 treesize of output 3 [2024-09-13 09:57:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 78 proven. 83 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-13 09:57:59,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560666862] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:02,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:58:02,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 25 [2024-09-13 09:58:02,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511781230] [2024-09-13 09:58:02,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:02,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 09:58:02,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:02,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 09:58:02,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-09-13 09:58:02,774 INFO L87 Difference]: Start difference. First operand 147 states and 162 transitions. Second operand has 25 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 22 states have internal predecessors, (55), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-13 09:58:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:58:06,503 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2024-09-13 09:58:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 09:58:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 22 states have internal predecessors, (55), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) Word has length 82 [2024-09-13 09:58:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:58:06,504 INFO L225 Difference]: With dead ends: 153 [2024-09-13 09:58:06,505 INFO L226 Difference]: Without dead ends: 151 [2024-09-13 09:58:06,505 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 09:58:06,505 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:58:06,506 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 92 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-13 09:58:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-13 09:58:06,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-13 09:58:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 97 states have internal predecessors, (99), 32 states have call successors, (32), 22 states have call predecessors, (32), 23 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-13 09:58:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2024-09-13 09:58:06,593 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 82 [2024-09-13 09:58:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:58:06,593 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2024-09-13 09:58:06,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 22 states have internal predecessors, (55), 11 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-13 09:58:06,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2024-09-13 09:58:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-13 09:58:06,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:58:06,595 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:58:06,608 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 09:58:06,798 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 [2024-09-13 09:58:06,798 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:58:06,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:58:06,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1573323314, now seen corresponding path program 1 times [2024-09-13 09:58:06,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:58:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874111106] [2024-09-13 09:58:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:06,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:58:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:58:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445152867] [2024-09-13 09:58:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:58:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:58:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:58:06,839 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) [2024-09-13 09:58:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 09:58:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:58:06,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-09-13 09:58:06,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:58:06,979 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 11 treesize of output 7 [2024-09-13 09:58:06,996 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 11 treesize of output 7 [2024-09-13 09:58:07,014 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 48 treesize of output 35 [2024-09-13 09:58:07,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:58:07,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:58:07,079 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 11 treesize of output 7 [2024-09-13 09:58:10,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-09-13 09:58:10,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 09:58:34,972 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 19 treesize of output 11 [2024-09-13 09:58:35,042 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 19 treesize of output 11 [2024-09-13 09:58:35,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 09:58:35,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2024-09-13 09:58:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 123 proven. 61 refuted. 4 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 09:58:49,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:58:54,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 95 [2024-09-13 09:58:56,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:58:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874111106] [2024-09-13 09:58:56,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:58:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445152867] [2024-09-13 09:58:56,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445152867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:58:56,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 09:58:56,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-13 09:58:56,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579025057] [2024-09-13 09:58:56,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 09:58:56,619 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 09:58:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:58:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 09:58:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1054, Unknown=4, NotChecked=0, Total=1190 [2024-09-13 09:58:56,625 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-13 09:59:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:21,647 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2024-09-13 09:59:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 09:59:21,648 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 88 [2024-09-13 09:59:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:21,649 INFO L225 Difference]: With dead ends: 159 [2024-09-13 09:59:21,649 INFO L226 Difference]: Without dead ends: 157 [2024-09-13 09:59:21,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 60.0s TimeCoverageRelationStatistics Valid=368, Invalid=2705, Unknown=7, NotChecked=0, Total=3080 [2024-09-13 09:59:21,650 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 73 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:21,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 962 Invalid, 9 Unknown, 0 Unchecked, 5.2s Time] [2024-09-13 09:59:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-13 09:59:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2024-09-13 09:59:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 100 states have internal predecessors, (102), 32 states have call successors, (32), 23 states have call predecessors, (32), 24 states have return successors, (34), 31 states have call predecessors, (34), 29 states have call successors, (34) [2024-09-13 09:59:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 168 transitions. [2024-09-13 09:59:21,756 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 168 transitions. Word has length 88 [2024-09-13 09:59:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:21,756 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 168 transitions. [2024-09-13 09:59:21,756 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 8 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-13 09:59:21,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 168 transitions. [2024-09-13 09:59:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 09:59:21,757 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:21,757 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:59:21,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 09:59:21,957 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 [2024-09-13 09:59:21,958 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:21,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1625324318, now seen corresponding path program 5 times [2024-09-13 09:59:21,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:21,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583306459] [2024-09-13 09:59:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:21,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:21,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353542311] [2024-09-13 09:59:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:59:21,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:21,999 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) [2024-09-13 09:59:22,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 09:59:22,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 09:59:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:59:22,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-09-13 09:59:22,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:22,410 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 11 treesize of output 7 [2024-09-13 09:59:22,446 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 11 treesize of output 7 [2024-09-13 09:59:22,466 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 11 treesize of output 7 [2024-09-13 09:59:22,501 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 11 treesize of output 7 [2024-09-13 09:59:24,675 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 19 treesize of output 11 [2024-09-13 09:59:24,697 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 19 treesize of output 11 [2024-09-13 09:59:24,713 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 19 treesize of output 11 [2024-09-13 09:59:24,729 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 7 treesize of output 3 [2024-09-13 09:59:26,713 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 19 treesize of output 11 [2024-09-13 09:59:26,730 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 19 treesize of output 11 [2024-09-13 09:59:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 09:59:27,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:59:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-13 09:59:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:59:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583306459] [2024-09-13 09:59:29,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 09:59:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353542311] [2024-09-13 09:59:29,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353542311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:59:29,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 09:59:29,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2024-09-13 09:59:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199230445] [2024-09-13 09:59:29,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 09:59:29,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 09:59:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:59:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 09:59:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-13 09:59:29,512 INFO L87 Difference]: Start difference. First operand 155 states and 168 transitions. Second operand has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 12 states have call successors, (34), 11 states have call predecessors, (34), 4 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-13 09:59:37,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:59:37,851 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2024-09-13 09:59:37,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 09:59:37,852 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 12 states have call successors, (34), 11 states have call predecessors, (34), 4 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 92 [2024-09-13 09:59:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:59:37,853 INFO L225 Difference]: With dead ends: 221 [2024-09-13 09:59:37,853 INFO L226 Difference]: Without dead ends: 219 [2024-09-13 09:59:37,854 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 138 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 09:59:37,854 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 229 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-09-13 09:59:37,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 464 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-09-13 09:59:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-13 09:59:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2024-09-13 09:59:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 130 states have internal predecessors, (132), 38 states have call successors, (38), 30 states have call predecessors, (38), 33 states have return successors, (43), 38 states have call predecessors, (43), 35 states have call successors, (43) [2024-09-13 09:59:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 213 transitions. [2024-09-13 09:59:38,002 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 213 transitions. Word has length 92 [2024-09-13 09:59:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:59:38,002 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 213 transitions. [2024-09-13 09:59:38,003 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 17 states have internal predecessors, (58), 12 states have call successors, (34), 11 states have call predecessors, (34), 4 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2024-09-13 09:59:38,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:38,003 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 213 transitions. [2024-09-13 09:59:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-13 09:59:38,004 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:59:38,004 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:59:38,012 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 09:59:38,207 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 [2024-09-13 09:59:38,208 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:59:38,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:59:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1152243021, now seen corresponding path program 1 times [2024-09-13 09:59:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:59:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988710699] [2024-09-13 09:59:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:38,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:59:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 09:59:38,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386440255] [2024-09-13 09:59:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:59:38,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:59:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:59:38,250 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) [2024-09-13 09:59:38,251 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 09:59:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:59:38,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-09-13 09:59:38,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:59:38,426 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 48 treesize of output 35 [2024-09-13 09:59:38,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:59:38,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 1 [2024-09-13 09:59:38,494 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 11 treesize of output 7 [2024-09-13 09:59:38,515 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 11 treesize of output 7 [2024-09-13 09:59:38,534 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 11 treesize of output 7 [2024-09-13 09:59:42,071 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 11 treesize of output 7