./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:34:45,937 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:34:46,015 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:34:46,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:34:46,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:34:46,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:34:46,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:34:46,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:34:46,067 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:34:46,067 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:34:46,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:34:46,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:34:46,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:34:46,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:34:46,069 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:34:46,069 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:34:46,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:34:46,070 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:34:46,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:34:46,071 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:34:46,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:34:46,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:34:46,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:34:46,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:34:46,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:34:46,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:34:46,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:34:46,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:34:46,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:34:46,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:34:46,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:34:46,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:34:46,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:34:46,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:34:46,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:34:46,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:34:46,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:34:46,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:34:46,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:34:46,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:34:46,078 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:34:46,078 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:34:46,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:34:46,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:34:46,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:34:46,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:34:46,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:34:46,347 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:34:46,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-11 20:34:47,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:34:47,994 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:34:47,995 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-11 20:34:48,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0c46fb28e/a5e6a3d2d54c40eaa3a359fd3f04467c/FLAG0858f0742 [2024-09-11 20:34:48,020 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0c46fb28e/a5e6a3d2d54c40eaa3a359fd3f04467c [2024-09-11 20:34:48,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:34:48,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:34:48,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:34:48,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:34:48,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:34:48,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45857c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48, skipping insertion in model container [2024-09-11 20:34:48,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:34:48,197 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-11 20:34:48,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:34:48,244 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:34:48,256 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-11 20:34:48,307 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:34:48,333 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:34:48,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48 WrapperNode [2024-09-11 20:34:48,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:34:48,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:34:48,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:34:48,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:34:48,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,401 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2024-09-11 20:34:48,402 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:34:48,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:34:48,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:34:48,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:34:48,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,420 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,451 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 30, 21, 22, 35, 29]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 2, 1, 2, 3, 3]. [2024-09-11 20:34:48,452 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,452 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,482 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:34:48,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:34:48,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:34:48,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:34:48,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (1/1) ... [2024-09-11 20:34:48,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:34:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:48,530 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) [2024-09-11 20:34:48,532 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 [2024-09-11 20:34:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:34:48,570 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-09-11 20:34:48,571 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-09-11 20:34:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:34:48,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:34:48,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-09-11 20:34:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:34:48,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:34:48,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:34:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:34:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:34:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:34:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:34:48,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:34:48,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:34:48,708 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:34:48,710 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:34:49,062 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-11 20:34:49,062 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:34:49,104 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:34:49,104 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:34:49,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:34:49 BoogieIcfgContainer [2024-09-11 20:34:49,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:34:49,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:34:49,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:34:49,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:34:49,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:34:48" (1/3) ... [2024-09-11 20:34:49,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2d44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:34:49, skipping insertion in model container [2024-09-11 20:34:49,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:48" (2/3) ... [2024-09-11 20:34:49,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e2d44af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:34:49, skipping insertion in model container [2024-09-11 20:34:49,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:34:49" (3/3) ... [2024-09-11 20:34:49,116 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-09-11 20:34:49,134 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:34:49,134 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:34:49,209 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:34:49,216 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;@5022d13c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:34:49,217 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:34:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-11 20:34:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 20:34:49,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:49,231 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:49,231 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:49,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1180092585, now seen corresponding path program 1 times [2024-09-11 20:34:49,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:49,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579853521] [2024-09-11 20:34:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:49,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:34:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:34:49,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:49,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579853521] [2024-09-11 20:34:49,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579853521] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:49,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 20:34:49,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552338708] [2024-09-11 20:34:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:49,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 20:34:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:49,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 20:34:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:34:49,531 INFO L87 Difference]: Start difference. First operand has 44 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:34:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:49,734 INFO L93 Difference]: Finished difference Result 90 states and 136 transitions. [2024-09-11 20:34:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 20:34:49,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-11 20:34:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:49,747 INFO L225 Difference]: With dead ends: 90 [2024-09-11 20:34:49,748 INFO L226 Difference]: Without dead ends: 46 [2024-09-11 20:34:49,751 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:34:49,757 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:49,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:34:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-11 20:34:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-09-11 20:34:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-11 20:34:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-09-11 20:34:49,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 15 [2024-09-11 20:34:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:49,864 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-09-11 20:34:49,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:34:49,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-09-11 20:34:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-11 20:34:49,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:49,868 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:49,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:34:49,868 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:49,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 318761401, now seen corresponding path program 1 times [2024-09-11 20:34:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:49,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750255878] [2024-09-11 20:34:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:49,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:50,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:34:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:34:51,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:51,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750255878] [2024-09-11 20:34:51,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750255878] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:51,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:51,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-11 20:34:51,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003466490] [2024-09-11 20:34:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:51,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 20:34:51,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 20:34:51,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:34:51,241 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:34:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:52,158 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2024-09-11 20:34:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:34:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-11 20:34:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:52,160 INFO L225 Difference]: With dead ends: 75 [2024-09-11 20:34:52,161 INFO L226 Difference]: Without dead ends: 73 [2024-09-11 20:34:52,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:34:52,162 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:52,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 128 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:34:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-11 20:34:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-09-11 20:34:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 20 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2024-09-11 20:34:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2024-09-11 20:34:52,199 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 16 [2024-09-11 20:34:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:52,199 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2024-09-11 20:34:52,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.2) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:34:52,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2024-09-11 20:34:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 20:34:52,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:52,203 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:52,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:34:52,203 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -210214075, now seen corresponding path program 1 times [2024-09-11 20:34:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:52,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331194184] [2024-09-11 20:34:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:52,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504313852] [2024-09-11 20:34:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:52,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:52,250 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) [2024-09-11 20:34:52,252 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:34:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:52,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-11 20:34:52,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:52,489 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 [2024-09-11 20:34:52,499 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 11 [2024-09-11 20:34:52,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:52,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:34:52,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:34:52,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:34:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:34:52,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:52,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-11 20:34:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:52,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331194184] [2024-09-11 20:34:52,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:52,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504313852] [2024-09-11 20:34:52,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504313852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:52,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:52,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-11 20:34:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473868983] [2024-09-11 20:34:52,949 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:52,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 20:34:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 20:34:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:34:52,950 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:34:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:53,689 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2024-09-11 20:34:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:34:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-09-11 20:34:53,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:53,691 INFO L225 Difference]: With dead ends: 114 [2024-09-11 20:34:53,691 INFO L226 Difference]: Without dead ends: 112 [2024-09-11 20:34:53,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:34:53,693 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:53,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 195 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-11 20:34:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-11 20:34:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2024-09-11 20:34:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 8 states have call predecessors, (30), 11 states have return successors, (37), 29 states have call predecessors, (37), 28 states have call successors, (37) [2024-09-11 20:34:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2024-09-11 20:34:53,738 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 22 [2024-09-11 20:34:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:53,738 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2024-09-11 20:34:53,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:34:53,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2024-09-11 20:34:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 20:34:53,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:53,740 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:53,748 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:34:53,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:53,941 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:53,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash 661147168, now seen corresponding path program 1 times [2024-09-11 20:34:53,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622326570] [2024-09-11 20:34:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:54,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:34:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:34:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:34:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622326570] [2024-09-11 20:34:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622326570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:55,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941415115] [2024-09-11 20:34:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:55,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:55,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:55,335 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) [2024-09-11 20:34:55,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:34:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-11 20:34:55,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:55,514 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 [2024-09-11 20:34:55,520 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 11 [2024-09-11 20:34:55,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:55,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:34:56,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:34:56,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:56,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-09-11 20:34:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:34:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:34:56,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:57,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941415115] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:57,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:34:57,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2024-09-11 20:34:57,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871708967] [2024-09-11 20:34:57,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:57,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-11 20:34:57,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-11 20:34:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:34:57,451 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:35:07,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:35:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:08,103 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2024-09-11 20:35:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:35:08,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2024-09-11 20:35:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:08,105 INFO L225 Difference]: With dead ends: 150 [2024-09-11 20:35:08,105 INFO L226 Difference]: Without dead ends: 148 [2024-09-11 20:35:08,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=227, Invalid=2222, Unknown=1, NotChecked=0, Total=2450 [2024-09-11 20:35:08,108 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:08,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 290 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1456 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-09-11 20:35:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-11 20:35:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2024-09-11 20:35:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 89 states have internal predecessors, (96), 37 states have call successors, (37), 13 states have call predecessors, (37), 17 states have return successors, (48), 37 states have call predecessors, (48), 35 states have call successors, (48) [2024-09-11 20:35:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2024-09-11 20:35:08,168 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 22 [2024-09-11 20:35:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:08,169 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 181 transitions. [2024-09-11 20:35:08,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:35:08,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 181 transitions. [2024-09-11 20:35:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 20:35:08,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:08,171 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:08,190 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:08,372 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 [2024-09-11 20:35:08,372 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:08,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash 466428615, now seen corresponding path program 2 times [2024-09-11 20:35:08,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:08,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694290436] [2024-09-11 20:35:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:08,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:09,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:09,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:10,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:35:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694290436] [2024-09-11 20:35:10,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694290436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270570968] [2024-09-11 20:35:10,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:35:10,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:10,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:10,469 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) [2024-09-11 20:35:10,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:35:10,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:35:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:35:10,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-09-11 20:35:10,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:10,600 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 [2024-09-11 20:35:10,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-09-11 20:35:10,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:10,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:19,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:19,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2024-09-11 20:35:31,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:35:31,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:35:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-11 20:35:31,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:32,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2024-09-11 20:35:33,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:33,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 156 [2024-09-11 20:35:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270570968] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:34,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:35:34,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2024-09-11 20:35:34,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554633841] [2024-09-11 20:35:34,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:34,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:35:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:35:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1235, Unknown=5, NotChecked=0, Total=1332 [2024-09-11 20:35:34,491 INFO L87 Difference]: Start difference. First operand 140 states and 181 transitions. Second operand has 30 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:35:44,034 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 89 DAG size of output: 75 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-11 20:35:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:55,121 INFO L93 Difference]: Finished difference Result 196 states and 259 transitions. [2024-09-11 20:35:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-11 20:35:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2024-09-11 20:35:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:55,125 INFO L225 Difference]: With dead ends: 196 [2024-09-11 20:35:55,125 INFO L226 Difference]: Without dead ends: 194 [2024-09-11 20:35:55,127 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=385, Invalid=3768, Unknown=7, NotChecked=0, Total=4160 [2024-09-11 20:35:55,128 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:55,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 342 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1947 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-11 20:35:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-11 20:35:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 137. [2024-09-11 20:35:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 84 states have (on average 1.130952380952381) internal successors, (95), 88 states have internal predecessors, (95), 36 states have call successors, (36), 13 states have call predecessors, (36), 16 states have return successors, (43), 35 states have call predecessors, (43), 34 states have call successors, (43) [2024-09-11 20:35:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 174 transitions. [2024-09-11 20:35:55,192 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 174 transitions. Word has length 28 [2024-09-11 20:35:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:55,192 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 174 transitions. [2024-09-11 20:35:55,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:35:55,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 174 transitions. [2024-09-11 20:35:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-11 20:35:55,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:55,194 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:55,211 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 20:35:55,398 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 [2024-09-11 20:35:55,399 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:55,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1566657743, now seen corresponding path program 1 times [2024-09-11 20:35:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:55,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406792731] [2024-09-11 20:35:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160042051] [2024-09-11 20:35:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:55,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:55,436 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) [2024-09-11 20:35:55,437 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:35:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:55,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-09-11 20:35:55,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:55,621 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 [2024-09-11 20:35:55,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:55,663 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 11 [2024-09-11 20:35:55,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:55,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:56,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-11 20:35:56,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-11 20:35:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:35:56,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:32,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406792731] [2024-09-11 20:36:32,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:32,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160042051] [2024-09-11 20:36:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160042051] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:32,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 20:36:32,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829917391] [2024-09-11 20:36:32,294 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:32,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 20:36:32,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:32,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 20:36:32,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=143, Unknown=8, NotChecked=0, Total=182 [2024-09-11 20:36:32,296 INFO L87 Difference]: Start difference. First operand 137 states and 174 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:36:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:41,387 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2024-09-11 20:36:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:36:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-11 20:36:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:41,389 INFO L225 Difference]: With dead ends: 155 [2024-09-11 20:36:41,389 INFO L226 Difference]: Without dead ends: 153 [2024-09-11 20:36:41,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=76, Invalid=294, Unknown=10, NotChecked=0, Total=380 [2024-09-11 20:36:41,390 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:41,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 175 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:36:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-11 20:36:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2024-09-11 20:36:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.1290322580645162) internal successors, (105), 97 states have internal predecessors, (105), 39 states have call successors, (39), 15 states have call predecessors, (39), 18 states have return successors, (45), 38 states have call predecessors, (45), 36 states have call successors, (45) [2024-09-11 20:36:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 189 transitions. [2024-09-11 20:36:41,466 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 189 transitions. Word has length 28 [2024-09-11 20:36:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:41,466 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 189 transitions. [2024-09-11 20:36:41,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:36:41,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 189 transitions. [2024-09-11 20:36:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 20:36:41,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:41,468 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:36:41,486 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:36:41,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:41,669 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:36:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -858116137, now seen corresponding path program 1 times [2024-09-11 20:36:41,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:36:41,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358164856] [2024-09-11 20:36:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:36:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:36:41,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746030456] [2024-09-11 20:36:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:41,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:41,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:36:41,708 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) [2024-09-11 20:36:41,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:36:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:36:41,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-09-11 20:36:41,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:41,895 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 [2024-09-11 20:36:41,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:41,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:41,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:41,914 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 11 [2024-09-11 20:36:42,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:42,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2024-09-11 20:36:42,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:42,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2024-09-11 20:36:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:36:43,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:19,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358164856] [2024-09-11 20:37:19,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746030456] [2024-09-11 20:37:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746030456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:19,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-11 20:37:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724217807] [2024-09-11 20:37:19,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:19,685 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:37:19,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:37:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=194, Unknown=8, NotChecked=0, Total=240 [2024-09-11 20:37:19,686 INFO L87 Difference]: Start difference. First operand 151 states and 189 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:37:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:25,764 INFO L93 Difference]: Finished difference Result 159 states and 195 transitions. [2024-09-11 20:37:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:37:25,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-11 20:37:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:25,766 INFO L225 Difference]: With dead ends: 159 [2024-09-11 20:37:25,766 INFO L226 Difference]: Without dead ends: 157 [2024-09-11 20:37:25,767 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=93, Invalid=450, Unknown=9, NotChecked=0, Total=552 [2024-09-11 20:37:25,768 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 53 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:25,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 170 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 20:37:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-11 20:37:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2024-09-11 20:37:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 96 states have (on average 1.125) internal successors, (108), 100 states have internal predecessors, (108), 39 states have call successors, (39), 16 states have call predecessors, (39), 19 states have return successors, (45), 38 states have call predecessors, (45), 36 states have call successors, (45) [2024-09-11 20:37:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2024-09-11 20:37:25,852 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 34 [2024-09-11 20:37:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:25,853 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2024-09-11 20:37:25,853 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:37:25,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2024-09-11 20:37:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 20:37:25,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:25,855 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:25,873 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:26,055 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 20:37:26,056 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:26,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash 990596790, now seen corresponding path program 1 times [2024-09-11 20:37:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294662318] [2024-09-11 20:37:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:26,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:26,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184879348] [2024-09-11 20:37:26,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:26,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:26,107 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) [2024-09-11 20:37:26,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:37:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:26,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-09-11 20:37:26,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:26,314 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 [2024-09-11 20:37:26,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:26,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:26,391 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 11 [2024-09-11 20:37:26,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:26,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2024-09-11 20:37:26,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-11 20:37:28,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:28,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2024-09-11 20:37:28,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:28,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 52 [2024-09-11 20:37:28,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2024-09-11 20:37:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:37:28,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:13,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294662318] [2024-09-11 20:38:13,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:13,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184879348] [2024-09-11 20:38:13,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184879348] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:13,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:13,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-11 20:38:13,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975826967] [2024-09-11 20:38:13,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:13,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:38:13,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:13,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:38:13,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=255, Unknown=9, NotChecked=0, Total=306 [2024-09-11 20:38:13,237 INFO L87 Difference]: Start difference. First operand 155 states and 192 transitions. Second operand has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:38:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:20,294 INFO L93 Difference]: Finished difference Result 203 states and 247 transitions. [2024-09-11 20:38:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:38:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-09-11 20:38:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:20,296 INFO L225 Difference]: With dead ends: 203 [2024-09-11 20:38:20,296 INFO L226 Difference]: Without dead ends: 201 [2024-09-11 20:38:20,297 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=92, Invalid=498, Unknown=10, NotChecked=0, Total=600 [2024-09-11 20:38:20,297 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:20,297 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 205 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 821 Invalid, 2 Unknown, 0 Unchecked, 2.1s Time] [2024-09-11 20:38:20,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-11 20:38:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2024-09-11 20:38:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 122 states have (on average 1.1147540983606556) internal successors, (136), 126 states have internal predecessors, (136), 49 states have call successors, (49), 21 states have call predecessors, (49), 25 states have return successors, (58), 49 states have call predecessors, (58), 45 states have call successors, (58) [2024-09-11 20:38:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2024-09-11 20:38:20,390 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 34 [2024-09-11 20:38:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:20,391 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2024-09-11 20:38:20,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:38:20,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2024-09-11 20:38:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 20:38:20,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:20,392 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:20,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:20,592 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:20,593 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:20,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:20,593 INFO L85 PathProgramCache]: Analyzing trace with hash -766811939, now seen corresponding path program 2 times [2024-09-11 20:38:20,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037117209] [2024-09-11 20:38:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:20,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:20,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056179091] [2024-09-11 20:38:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:38:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:20,629 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) [2024-09-11 20:38:20,630 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:38:20,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:38:20,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:20,835 WARN L260 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-09-11 20:38:20,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:20,887 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 [2024-09-11 20:38:20,983 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 11 [2024-09-11 20:38:20,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:21,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:21,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:21,585 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 44 treesize of output 21 [2024-09-11 20:38:22,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-11 20:38:24,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:24,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2024-09-11 20:38:24,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:24,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 57 [2024-09-11 20:38:24,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 37 [2024-09-11 20:38:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 20:38:24,793 INFO L327 TraceCheckSpWp]: Computing backward predicates...