./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/duplets.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 04d6fb36 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/verifythis/duplets.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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:57:10,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:57:10,992 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:57:10,997 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:57:10,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:57:11,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:57:11,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:57:11,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:57:11,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:57:11,022 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:57:11,022 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:57:11,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:57:11,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:57:11,025 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:57:11,026 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:57:11,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:57:11,026 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:57:11,026 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:57:11,027 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:57:11,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:57:11,028 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:57:11,028 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:57:11,028 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:57:11,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:57:11,028 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:57:11,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:57:11,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:57:11,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:57:11,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:57:11,030 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:57:11,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:57:11,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:57:11,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:57:11,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:57:11,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:57:11,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:57:11,333 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:57:11,333 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:57:11,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/duplets.c [2024-09-15 18:57:12,649 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:57:12,811 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:57:12,812 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/duplets.c [2024-09-15 18:57:12,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/05c530d4c/827c767c01ee4d1abf75cb5b045d355f/FLAGf0f98767c [2024-09-15 18:57:13,221 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/05c530d4c/827c767c01ee4d1abf75cb5b045d355f [2024-09-15 18:57:13,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:57:13,223 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:57:13,224 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:57:13,224 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:57:13,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:57:13,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb159e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13, skipping insertion in model container [2024-09-15 18:57:13,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,244 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:57:13,368 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/duplets.c[485,498] [2024-09-15 18:57:13,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:57:13,412 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:57:13,421 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/duplets.c[485,498] [2024-09-15 18:57:13,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:57:13,454 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:57:13,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13 WrapperNode [2024-09-15 18:57:13,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:57:13,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:57:13,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:57:13,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:57:13,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,476 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:57:13,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:57:13,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:57:13,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:57:13,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:57:13,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,502 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 5, 5, 7]. 37 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 5 writes are split as follows [0, 1, 1, 3]. [2024-09-15 18:57:13,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,513 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:57:13,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:57:13,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:57:13,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:57:13,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (1/1) ... [2024-09-15 18:57:13,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:57:13,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:13,549 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) [2024-09-15 18:57:13,552 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 [2024-09-15 18:57:13,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:57:13,584 INFO L130 BoogieDeclarations]: Found specification of procedure finddup [2024-09-15 18:57:13,584 INFO L138 BoogieDeclarations]: Found implementation of procedure finddup [2024-09-15 18:57:13,584 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 18:57:13,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:57:13,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:57:13,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:57:13,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure mkdup [2024-09-15 18:57:13,586 INFO L138 BoogieDeclarations]: Found implementation of procedure mkdup [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:57:13,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-15 18:57:13,586 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-15 18:57:13,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:57:13,587 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:57:13,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 18:57:13,661 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:57:13,662 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:57:13,854 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2024-09-15 18:57:13,854 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:57:13,878 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:57:13,878 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 18:57:13,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:57:13 BoogieIcfgContainer [2024-09-15 18:57:13,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:57:13,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:57:13,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:57:13,883 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:57:13,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:57:13" (1/3) ... [2024-09-15 18:57:13,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1523c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:57:13, skipping insertion in model container [2024-09-15 18:57:13,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:57:13" (2/3) ... [2024-09-15 18:57:13,884 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1523c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:57:13, skipping insertion in model container [2024-09-15 18:57:13,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:57:13" (3/3) ... [2024-09-15 18:57:13,886 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2024-09-15 18:57:13,900 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:57:13,900 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:57:13,955 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:57:13,965 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;@ef0a868, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:57:13,966 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:57:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 states have internal predecessors, (41), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-15 18:57:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:57:13,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:13,978 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:13,978 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:13,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1311007902, now seen corresponding path program 1 times [2024-09-15 18:57:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453619332] [2024-09-15 18:57:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:13,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:14,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453619332] [2024-09-15 18:57:14,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453619332] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:14,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:14,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 18:57:14,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800705736] [2024-09-15 18:57:14,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:14,309 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:57:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:57:14,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 18:57:14,332 INFO L87 Difference]: Start difference. First operand has 54 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 states have internal predecessors, (41), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-15 18:57:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:14,549 INFO L93 Difference]: Finished difference Result 118 states and 170 transitions. [2024-09-15 18:57:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:57:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2024-09-15 18:57:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:14,559 INFO L225 Difference]: With dead ends: 118 [2024-09-15 18:57:14,560 INFO L226 Difference]: Without dead ends: 64 [2024-09-15 18:57:14,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:57:14,566 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:14,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 32 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:57:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-15 18:57:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2024-09-15 18:57:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 18:57:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-09-15 18:57:14,608 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 46 [2024-09-15 18:57:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:14,609 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-09-15 18:57:14,609 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-15 18:57:14,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-09-15 18:57:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:57:14,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:14,613 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:14,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:57:14,614 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:14,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:14,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1692327078, now seen corresponding path program 1 times [2024-09-15 18:57:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135322625] [2024-09-15 18:57:14,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:14,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:14,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:15,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:15,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135322625] [2024-09-15 18:57:15,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135322625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096509100] [2024-09-15 18:57:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:15,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:15,064 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) [2024-09-15 18:57:15,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:57:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:15,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:57:15,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:15,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:15,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096509100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:15,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 17 [2024-09-15 18:57:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037680955] [2024-09-15 18:57:15,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:15,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:57:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:57:15,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:57:15,596 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 18:57:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:16,103 INFO L93 Difference]: Finished difference Result 99 states and 128 transitions. [2024-09-15 18:57:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 18:57:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 46 [2024-09-15 18:57:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:16,105 INFO L225 Difference]: With dead ends: 99 [2024-09-15 18:57:16,105 INFO L226 Difference]: Without dead ends: 78 [2024-09-15 18:57:16,106 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:57:16,107 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 94 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:16,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 396 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-15 18:57:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2024-09-15 18:57:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 18:57:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2024-09-15 18:57:16,125 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 46 [2024-09-15 18:57:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:16,127 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2024-09-15 18:57:16,127 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-15 18:57:16,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2024-09-15 18:57:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 18:57:16,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:16,130 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:16,143 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:57:16,334 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 [2024-09-15 18:57:16,335 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:16,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash -762329273, now seen corresponding path program 1 times [2024-09-15 18:57:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:16,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199951837] [2024-09-15 18:57:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:16,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199951837] [2024-09-15 18:57:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199951837] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:16,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:16,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 18:57:16,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594239740] [2024-09-15 18:57:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:16,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:57:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:57:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:57:16,458 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:16,718 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2024-09-15 18:57:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:57:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 47 [2024-09-15 18:57:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:16,720 INFO L225 Difference]: With dead ends: 71 [2024-09-15 18:57:16,720 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 18:57:16,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:57:16,721 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:16,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 185 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:57:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 18:57:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-15 18:57:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-15 18:57:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-15 18:57:16,735 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 47 [2024-09-15 18:57:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:16,736 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-15 18:57:16,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:16,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-15 18:57:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-15 18:57:16,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:16,739 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:16,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:57:16,739 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:16,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1192301050, now seen corresponding path program 1 times [2024-09-15 18:57:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:16,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554928052] [2024-09-15 18:57:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:16,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:17,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554928052] [2024-09-15 18:57:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554928052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:17,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662906580] [2024-09-15 18:57:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:17,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:17,298 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) [2024-09-15 18:57:17,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:57:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:17,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:57:17,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:17,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662906580] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:17,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-15 18:57:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 12] total 27 [2024-09-15 18:57:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644179905] [2024-09-15 18:57:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:17,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:57:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:57:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-09-15 18:57:17,965 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 18:57:18,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:18,112 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2024-09-15 18:57:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 18:57:18,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 49 [2024-09-15 18:57:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:18,118 INFO L225 Difference]: With dead ends: 101 [2024-09-15 18:57:18,118 INFO L226 Difference]: Without dead ends: 68 [2024-09-15 18:57:18,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-09-15 18:57:18,119 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:18,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 406 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-15 18:57:18,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-09-15 18:57:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-15 18:57:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-09-15 18:57:18,135 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 49 [2024-09-15 18:57:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:18,135 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-09-15 18:57:18,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 18:57:18,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-09-15 18:57:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-15 18:57:18,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:18,136 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:18,151 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 18:57:18,341 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:18,342 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:18,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1656998341, now seen corresponding path program 1 times [2024-09-15 18:57:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858147747] [2024-09-15 18:57:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:18,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:18,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858147747] [2024-09-15 18:57:18,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858147747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:18,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111244297] [2024-09-15 18:57:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:18,434 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) [2024-09-15 18:57:18,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:57:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:18,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 18:57:18,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:18,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:18,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111244297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:57:18,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:57:18,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2024-09-15 18:57:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701907821] [2024-09-15 18:57:18,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:18,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:57:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:57:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:57:18,595 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:18,796 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2024-09-15 18:57:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:57:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2024-09-15 18:57:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:18,798 INFO L225 Difference]: With dead ends: 94 [2024-09-15 18:57:18,798 INFO L226 Difference]: Without dead ends: 73 [2024-09-15 18:57:18,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:57:18,799 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:18,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 118 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:57:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-15 18:57:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-09-15 18:57:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 41 states have internal predecessors, (46), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-15 18:57:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-09-15 18:57:18,811 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 51 [2024-09-15 18:57:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:18,811 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-09-15 18:57:18,811 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:18,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-09-15 18:57:18,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:18,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:18,814 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:18,827 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:19,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:19,019 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:19,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash 106146672, now seen corresponding path program 1 times [2024-09-15 18:57:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224996974] [2024-09-15 18:57:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:57:19,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224996974] [2024-09-15 18:57:19,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224996974] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:19,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:19,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-15 18:57:19,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684018315] [2024-09-15 18:57:19,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:19,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:57:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:57:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:57:19,371 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-15 18:57:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:19,822 INFO L93 Difference]: Finished difference Result 107 states and 135 transitions. [2024-09-15 18:57:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:57:19,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 54 [2024-09-15 18:57:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:19,823 INFO L225 Difference]: With dead ends: 107 [2024-09-15 18:57:19,823 INFO L226 Difference]: Without dead ends: 93 [2024-09-15 18:57:19,824 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:57:19,824 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:19,824 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 204 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-15 18:57:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2024-09-15 18:57:19,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.1875) internal successors, (57), 51 states have internal predecessors, (57), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-09-15 18:57:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2024-09-15 18:57:19,834 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 54 [2024-09-15 18:57:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:19,835 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2024-09-15 18:57:19,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-15 18:57:19,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2024-09-15 18:57:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:57:19,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:19,836 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:19,836 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 18:57:19,836 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:19,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -265637807, now seen corresponding path program 2 times [2024-09-15 18:57:19,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:19,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729975629] [2024-09-15 18:57:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:19,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:20,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-15 18:57:21,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729975629] [2024-09-15 18:57:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729975629] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:21,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486418372] [2024-09-15 18:57:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:57:21,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:21,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:21,186 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) [2024-09-15 18:57:21,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:57:21,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:57:21,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:21,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-15 18:57:21,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:21,459 INFO L349 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2024-09-15 18:57:21,460 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 1 case distinctions, treesize of input 38 treesize of output 19 [2024-09-15 18:57:27,289 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (v_mkdup_~i~0_30 Int) (v_mkdup_~j~0_34 Int) (v_main_~a~0.offset_BEFORE_CALL_1 Int)) (and (let ((.cse0 (select |c_#memory_int#3| v_main_~a~0.base_BEFORE_CALL_1))) (= (select .cse0 (+ (* v_mkdup_~j~0_34 4) v_main_~a~0.offset_BEFORE_CALL_1)) (select .cse0 (+ (* v_mkdup_~i~0_30 4) v_main_~a~0.offset_BEFORE_CALL_1)))) (not (= v_mkdup_~i~0_30 v_mkdup_~j~0_34)) (<= 0 v_mkdup_~i~0_30) (<= 0 v_mkdup_~j~0_34))) is different from true [2024-09-15 18:57:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:57:47,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:57:48,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486418372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:48,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 18:57:48,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 34 [2024-09-15 18:57:48,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49537159] [2024-09-15 18:57:48,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 18:57:48,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-15 18:57:48,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-15 18:57:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1036, Unknown=6, NotChecked=64, Total=1190 [2024-09-15 18:57:48,271 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 34 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-15 18:57:57,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 18:57:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:58,188 INFO L93 Difference]: Finished difference Result 152 states and 195 transitions. [2024-09-15 18:57:58,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-15 18:57:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) Word has length 54 [2024-09-15 18:57:58,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:58,190 INFO L225 Difference]: With dead ends: 152 [2024-09-15 18:57:58,190 INFO L226 Difference]: Without dead ends: 111 [2024-09-15 18:57:58,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=360, Invalid=3412, Unknown=14, NotChecked=120, Total=3906 [2024-09-15 18:57:58,194 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 212 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:58,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 605 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1617 Invalid, 1 Unknown, 134 Unchecked, 6.0s Time] [2024-09-15 18:57:58,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-15 18:57:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2024-09-15 18:57:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 55 states have internal predecessors, (62), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2024-09-15 18:57:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2024-09-15 18:57:58,214 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 54 [2024-09-15 18:57:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:58,214 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2024-09-15 18:57:58,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 12 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-15 18:57:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2024-09-15 18:57:58,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:57:58,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:58,216 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:58,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 18:57:58,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:58,421 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:58,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:58,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1209816935, now seen corresponding path program 1 times [2024-09-15 18:57:58,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:58,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976106524] [2024-09-15 18:57:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:58,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:58,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:57:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:57:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976106524] [2024-09-15 18:57:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976106524] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:58,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-15 18:57:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775790627] [2024-09-15 18:57:58,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:58,658 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 18:57:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 18:57:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:57:58,659 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 18:57:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:59,042 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2024-09-15 18:57:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 18:57:59,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-09-15 18:57:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:59,043 INFO L225 Difference]: With dead ends: 100 [2024-09-15 18:57:59,043 INFO L226 Difference]: Without dead ends: 98 [2024-09-15 18:57:59,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:57:59,044 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 67 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:59,044 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 209 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:57:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-15 18:57:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2024-09-15 18:57:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 62 states have internal predecessors, (71), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 18:57:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2024-09-15 18:57:59,064 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 61 [2024-09-15 18:57:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:59,065 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2024-09-15 18:57:59,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 18:57:59,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2024-09-15 18:57:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:57:59,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:59,067 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:59,067 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-15 18:57:59,067 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:59,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1211663977, now seen corresponding path program 1 times [2024-09-15 18:57:59,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558031723] [2024-09-15 18:57:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:57:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:57:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:57:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:59,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558031723] [2024-09-15 18:57:59,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558031723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:59,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:57:59,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 18:57:59,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719384087] [2024-09-15 18:57:59,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:59,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:57:59,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:57:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:57:59,234 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 18:57:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:59,506 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2024-09-15 18:57:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:57:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-09-15 18:57:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:59,509 INFO L225 Difference]: With dead ends: 105 [2024-09-15 18:57:59,509 INFO L226 Difference]: Without dead ends: 94 [2024-09-15 18:57:59,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:57:59,510 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 65 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:59,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 140 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:57:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-15 18:57:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-09-15 18:57:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 18:57:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-09-15 18:57:59,528 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 61 [2024-09-15 18:57:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:59,528 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-09-15 18:57:59,528 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 18:57:59,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-09-15 18:57:59,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 18:57:59,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:59,532 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:59,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-15 18:57:59,532 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:57:59,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -22267472, now seen corresponding path program 3 times [2024-09-15 18:57:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:57:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532838331] [2024-09-15 18:57:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:57:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:57:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:57:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:57:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:57:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:57:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:57:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:57:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:57:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:57:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 18:57:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:57:59,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532838331] [2024-09-15 18:57:59,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532838331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:57:59,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493136859] [2024-09-15 18:57:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:57:59,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:57:59,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:57:59,642 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) [2024-09-15 18:57:59,643 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:57:59,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:57:59,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:57:59,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 18:57:59,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:57:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:57:59,757 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:57:59,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493136859] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:57:59,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:57:59,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2024-09-15 18:57:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097856670] [2024-09-15 18:57:59,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:57:59,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:57:59,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:57:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:57:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:57:59,758 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:57:59,797 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2024-09-15 18:57:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:57:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 59 [2024-09-15 18:57:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:57:59,799 INFO L225 Difference]: With dead ends: 140 [2024-09-15 18:57:59,799 INFO L226 Difference]: Without dead ends: 92 [2024-09-15 18:57:59,800 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:57:59,800 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:57:59,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 204 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:57:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-15 18:57:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2024-09-15 18:57:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 63 states have internal predecessors, (70), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 18:57:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-09-15 18:57:59,827 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 59 [2024-09-15 18:57:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:57:59,827 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-09-15 18:57:59,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-15 18:57:59,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:57:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-09-15 18:57:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:57:59,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:57:59,829 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:57:59,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:58:00,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 18:58:00,030 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:00,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1976101370, now seen corresponding path program 1 times [2024-09-15 18:58:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:00,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665748529] [2024-09-15 18:58:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:00,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:58:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:58:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:58:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:58:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:58:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:58:00,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665748529] [2024-09-15 18:58:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665748529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:00,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165433110] [2024-09-15 18:58:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:00,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:00,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:00,366 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) [2024-09-15 18:58:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:58:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:00,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 18:58:00,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:00,549 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 [2024-09-15 18:58:00,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-15 18:58:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 18:58:00,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:00,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-15 18:58:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 18:58:00,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165433110] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:58:00,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:58:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 23 [2024-09-15 18:58:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306805287] [2024-09-15 18:58:00,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:00,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:58:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:58:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:58:00,839 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-15 18:58:01,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:01,442 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2024-09-15 18:58:01,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 18:58:01,443 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 61 [2024-09-15 18:58:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:01,446 INFO L225 Difference]: With dead ends: 129 [2024-09-15 18:58:01,446 INFO L226 Difference]: Without dead ends: 106 [2024-09-15 18:58:01,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:58:01,447 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:01,447 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 269 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:58:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-15 18:58:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2024-09-15 18:58:01,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 65 states have internal predecessors, (74), 19 states have call successors, (19), 10 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-15 18:58:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2024-09-15 18:58:01,470 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 61 [2024-09-15 18:58:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:01,470 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2024-09-15 18:58:01,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 19 states have internal predecessors, (52), 4 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-15 18:58:01,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2024-09-15 18:58:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:58:01,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:01,472 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:58:01,486 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:58:01,672 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 18:58:01,674 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:01,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1977948412, now seen corresponding path program 1 times [2024-09-15 18:58:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500523598] [2024-09-15 18:58:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:58:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:58:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:58:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:58:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:58:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:58:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:01,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500523598] [2024-09-15 18:58:01,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500523598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:58:01,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:58:01,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 18:58:01,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52546231] [2024-09-15 18:58:01,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:58:01,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:58:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:58:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:58:01,858 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-15 18:58:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:58:02,190 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2024-09-15 18:58:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:58:02,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2024-09-15 18:58:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:58:02,195 INFO L225 Difference]: With dead ends: 122 [2024-09-15 18:58:02,195 INFO L226 Difference]: Without dead ends: 104 [2024-09-15 18:58:02,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:58:02,196 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 63 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:58:02,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:58:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-15 18:58:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2024-09-15 18:58:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2024-09-15 18:58:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2024-09-15 18:58:02,215 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 61 [2024-09-15 18:58:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:58:02,215 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2024-09-15 18:58:02,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-15 18:58:02,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2024-09-15 18:58:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 18:58:02,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:58:02,217 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:58:02,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-15 18:58:02,217 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:58:02,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:58:02,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1604316891, now seen corresponding path program 4 times [2024-09-15 18:58:02,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:58:02,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446991949] [2024-09-15 18:58:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:58:02,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:58:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:58:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 18:58:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:58:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 18:58:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-15 18:58:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:58:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:02,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:58:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:58:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-15 18:58:05,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:58:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446991949] [2024-09-15 18:58:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446991949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164541458] [2024-09-15 18:58:05,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:58:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:58:05,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:58:05,054 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) [2024-09-15 18:58:05,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:58:05,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:58:05,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:58:05,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-15 18:58:05,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:58:05,173 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 7 treesize of output 6 [2024-09-15 18:58:05,247 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_mkdup_~a.offset_22 Int) (v_mkdup_~j~0_39 Int) (v_mkdup_~i~0_35 Int)) (= |c_#memory_int#3| (store |c_old(#memory_int#3)| |c_mkdup_#in~a.base| (let ((.cse1 (+ (* v_mkdup_~j~0_39 4) v_mkdup_~a.offset_22))) (let ((.cse0 (select (select |c_#memory_int#3| |c_mkdup_#in~a.base|) .cse1))) (store (store (select |c_old(#memory_int#3)| |c_mkdup_#in~a.base|) (+ v_mkdup_~a.offset_22 (* v_mkdup_~i~0_35 4)) .cse0) .cse1 .cse0)))))) is different from true [2024-09-15 18:58:05,254 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 45 treesize of output 40 [2024-09-15 18:58:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 18:58:06,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:58:07,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164541458] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:58:07,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 18:58:07,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2024-09-15 18:58:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255849625] [2024-09-15 18:58:07,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 18:58:07,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 18:58:07,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:58:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 18:58:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2036, Unknown=1, NotChecked=92, Total=2352 [2024-09-15 18:58:07,642 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 37 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-15 18:58:12,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 18:58:16,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 18:58:20,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 18:58:24,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:00:21,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:01:26,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]