./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.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_egcd-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --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 20:35:12,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:35:12,687 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:35:12,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:35:12,692 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:35:12,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:35:12,715 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:35:12,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:35:12,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:35:12,718 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:35:12,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:35:12,719 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:35:12,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:35:12,720 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:35:12,720 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:35:12,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:35:12,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:35:12,721 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:35:12,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:35:12,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:35:12,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:35:12,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:35:12,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:35:12,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:35:12,726 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:35:12,726 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:35:12,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:35:12,726 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:35:12,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:35:12,727 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:35:12,727 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:35:12,727 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:35:12,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:35:12,728 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:35:12,728 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:35:12,728 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:35:12,728 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:35:12,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:35:12,729 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:35:12,729 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:35:12,729 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:35:12,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:35:12,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:35:12,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:35:12,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:35:12,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:35:12,988 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:35:12,989 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:35:12,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-11 20:35:14,423 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:35:14,607 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:35:14,607 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-11 20:35:14,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/76f4b52d7/0f46e0e3b34245f2bd4fc3ebb1a25c0e/FLAG1b2a5b157 [2024-09-11 20:35:14,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/76f4b52d7/0f46e0e3b34245f2bd4fc3ebb1a25c0e [2024-09-11 20:35:14,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:35:14,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:35:14,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:35:14,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:35:14,995 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:35:14,996 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:14,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d6b604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:14, skipping insertion in model container [2024-09-11 20:35:14,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:35:14" (1/1) ... [2024-09-11 20:35:15,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:35:15,199 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_egcd-ll.c[1019,1032] [2024-09-11 20:35:15,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:35:15,236 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:35:15,250 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_egcd-ll.c[1019,1032] [2024-09-11 20:35:15,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:35:15,296 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:35:15,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15 WrapperNode [2024-09-11 20:35:15,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:35:15,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:35:15,299 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:35:15,299 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:35:15,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,332 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2024-09-11 20:35:15,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:35:15,334 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:35:15,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:35:15,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:35:15,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,345 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,359 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 7, 7, 8, 8, 10, 8, 8, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 1, 1, 2, 2, 2, 2, 2, 2]. [2024-09-11 20:35:15,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:35:15,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:35:15,384 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:35:15,384 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:35:15,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (1/1) ... [2024-09-11 20:35:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:35:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:15,413 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 20:35:15,419 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 20:35:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:35:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-09-11 20:35:15,464 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-09-11 20:35:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:35:15,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:35:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:35:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:35:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:35:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:35:15,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:35:15,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:35:15,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:35:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:35:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-11 20:35:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-11 20:35:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-11 20:35:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:35:15,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:35:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:35:15,612 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:35:15,615 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:35:15,901 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-11 20:35:15,901 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:35:15,946 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:35:15,946 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:35:15,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:35:15 BoogieIcfgContainer [2024-09-11 20:35:15,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:35:15,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:35:15,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:35:15,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:35:15,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:35:14" (1/3) ... [2024-09-11 20:35:15,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2987877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:35:15, skipping insertion in model container [2024-09-11 20:35:15,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:35:15" (2/3) ... [2024-09-11 20:35:15,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2987877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:35:15, skipping insertion in model container [2024-09-11 20:35:15,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:35:15" (3/3) ... [2024-09-11 20:35:15,956 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-09-11 20:35:15,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:35:15,971 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:35:16,017 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:35:16,022 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;@45766c5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:35:16,023 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:35:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 20:35:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:35:16,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:16,035 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:16,035 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:16,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1393043311, now seen corresponding path program 1 times [2024-09-11 20:35:16,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:16,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675925616] [2024-09-11 20:35:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:16,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:16,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:35:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:35:16,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:16,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675925616] [2024-09-11 20:35:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675925616] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:35:16,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:35:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:35:16,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300270607] [2024-09-11 20:35:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:16,312 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:35:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:35:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:35:16,334 INFO L87 Difference]: Start difference. First operand has 39 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:35:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:16,370 INFO L93 Difference]: Finished difference Result 76 states and 110 transitions. [2024-09-11 20:35:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:35:16,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-11 20:35:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:16,379 INFO L225 Difference]: With dead ends: 76 [2024-09-11 20:35:16,380 INFO L226 Difference]: Without dead ends: 37 [2024-09-11 20:35:16,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:35:16,388 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:16,390 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:35:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-11 20:35:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-11 20:35:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:35:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-11 20:35:16,438 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2024-09-11 20:35:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:16,440 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-11 20:35:16,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:35:16,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-11 20:35:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:35:16,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:16,443 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:16,443 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:35:16,444 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:16,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2014640661, now seen corresponding path program 1 times [2024-09-11 20:35:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:16,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740051666] [2024-09-11 20:35:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:16,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888114463] [2024-09-11 20:35:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:16,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:16,583 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 20:35:16,586 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 20:35:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:16,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-11 20:35:16,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:16,909 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 20:35:16,922 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 20:35:16,933 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 20:35:16,940 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 20:35:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:35:17,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:35:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740051666] [2024-09-11 20:35:17,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:17,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888114463] [2024-09-11 20:35:17,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888114463] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:35:17,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:35:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:35:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688599099] [2024-09-11 20:35:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:17,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:35:17,144 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:35:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:17,435 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-09-11 20:35:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:35:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-11 20:35:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:17,438 INFO L225 Difference]: With dead ends: 60 [2024-09-11 20:35:17,439 INFO L226 Difference]: Without dead ends: 58 [2024-09-11 20:35:17,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:35:17,440 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:17,442 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 196 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:35:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-11 20:35:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-09-11 20:35:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-11 20:35:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-09-11 20:35:17,466 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 20 [2024-09-11 20:35:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:17,468 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-09-11 20:35:17,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:35:17,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-09-11 20:35:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-11 20:35:17,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:17,470 INFO L216 NwaCegarLoop]: trace histogram [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 20:35:17,488 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 20:35:17,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:17,671 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:17,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -989224114, now seen corresponding path program 1 times [2024-09-11 20:35:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492809055] [2024-09-11 20:35:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447909244] [2024-09-11 20:35:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:17,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:17,736 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 20:35:17,737 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 20:35:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:17,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-11 20:35:17,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:17,915 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 20:35:17,921 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 20:35:18,098 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 20:35:18,104 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 20:35:18,116 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 20:35:18,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:18,541 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 33 treesize of output 29 [2024-09-11 20:35:18,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:35:18,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:35:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:35:18,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:35:19,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492809055] [2024-09-11 20:35:19,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447909244] [2024-09-11 20:35:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447909244] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 22 [2024-09-11 20:35:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254947433] [2024-09-11 20:35:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:19,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:35:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:35:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:35:19,068 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:35:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:19,645 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2024-09-11 20:35:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:35:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-11 20:35:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:19,651 INFO L225 Difference]: With dead ends: 74 [2024-09-11 20:35:19,653 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 20:35:19,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:35:19,657 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:19,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:35:19,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 20:35:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-09-11 20:35:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 47 states have internal predecessors, (50), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (21), 17 states have call predecessors, (21), 17 states have call successors, (21) [2024-09-11 20:35:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2024-09-11 20:35:19,696 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 26 [2024-09-11 20:35:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:19,697 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2024-09-11 20:35:19,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:35:19,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2024-09-11 20:35:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-11 20:35:19,699 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:19,699 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] [2024-09-11 20:35:19,717 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:35:19,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:19,904 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:19,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1390773957, now seen corresponding path program 1 times [2024-09-11 20:35:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:19,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753964537] [2024-09-11 20:35:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191248801] [2024-09-11 20:35:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:19,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:19,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:19,970 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 20:35:19,972 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 20:35:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:20,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-11 20:35:20,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:20,110 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 20:35:20,117 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 20:35:20,125 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 20:35:20,135 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 20:35:20,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:35:20,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:35:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:35:20,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753964537] [2024-09-11 20:35:20,511 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191248801] [2024-09-11 20:35:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191248801] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:20,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:20,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-11 20:35:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120796031] [2024-09-11 20:35:20,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:20,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 20:35:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 20:35:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:35:20,515 INFO L87 Difference]: Start difference. First operand 71 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), 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 20:35:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:20,903 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2024-09-11 20:35:20,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:35:20,903 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), 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 32 [2024-09-11 20:35:20,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:20,905 INFO L225 Difference]: With dead ends: 120 [2024-09-11 20:35:20,905 INFO L226 Difference]: Without dead ends: 118 [2024-09-11 20:35:20,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:35:20,906 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:20,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 183 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:35:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-11 20:35:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2024-09-11 20:35:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 71 states have internal predecessors, (77), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (31), 25 states have call predecessors, (31), 24 states have call successors, (31) [2024-09-11 20:35:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-09-11 20:35:20,951 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 32 [2024-09-11 20:35:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:20,951 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-09-11 20:35:20,951 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), 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 20:35:20,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-09-11 20:35:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:35:20,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:20,953 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:20,973 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:35:21,157 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:21,158 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:21,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:21,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2034600058, now seen corresponding path program 1 times [2024-09-11 20:35:21,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798642998] [2024-09-11 20:35:21,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:21,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:35:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:35:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:35:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:35:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:35:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:35:21,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:21,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798642998] [2024-09-11 20:35:21,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798642998] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:35:21,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:35:21,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-11 20:35:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792932608] [2024-09-11 20:35:21,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:35:21,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:35:21,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:35:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:35:21,673 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:35:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:22,096 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2024-09-11 20:35:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:35:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-09-11 20:35:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:22,098 INFO L225 Difference]: With dead ends: 119 [2024-09-11 20:35:22,098 INFO L226 Difference]: Without dead ends: 117 [2024-09-11 20:35:22,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:35:22,099 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:22,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 109 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:35:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-11 20:35:22,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-11 20:35:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.135135135135135) internal successors, (84), 78 states have internal predecessors, (84), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-09-11 20:35:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2024-09-11 20:35:22,154 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 42 [2024-09-11 20:35:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:22,155 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2024-09-11 20:35:22,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:35:22,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:22,155 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2024-09-11 20:35:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:35:22,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:22,156 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:22,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-11 20:35:22,157 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:22,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:22,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1212698772, now seen corresponding path program 1 times [2024-09-11 20:35:22,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:22,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20732401] [2024-09-11 20:35:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:22,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428317812] [2024-09-11 20:35:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:22,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:22,204 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 20:35:22,206 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 20:35:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:22,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-11 20:35:22,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:22,376 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 20:35:22,381 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 20:35:22,384 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 20:35:22,394 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 20:35:22,739 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 20:35:22,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-11 20:35:22,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:35:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:35:22,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:31,678 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_7| Int)) (or (= (* (select (select |c_#memory_int#8| |c_func_to_recursive_line_33_to_48_0_#in~p.base|) |c_func_to_recursive_line_33_to_48_0_#in~p.offset|) (select (select |c_#memory_int#3| |c_func_to_recursive_line_33_to_48_0_#in~s.base|) |c_func_to_recursive_line_33_to_48_0_#in~s.offset|)) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem6_7| (select (select |c_#memory_int#6| |c_func_to_recursive_line_33_to_48_0_#in~q.base|) |c_func_to_recursive_line_33_to_48_0_#in~q.offset|)) 1)) (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_33_to_48_0_#in~r.base|) |c_func_to_recursive_line_33_to_48_0_#in~r.offset|) |v_func_to_recursive_line_33_to_48_0_#t~mem6_7|))) is different from false [2024-09-11 20:35:48,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20732401] [2024-09-11 20:35:48,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:48,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428317812] [2024-09-11 20:35:48,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428317812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:48,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:48,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 20:35:48,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527141548] [2024-09-11 20:35:48,031 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:48,031 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:35:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:48,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:35:48,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=141, Unknown=6, NotChecked=24, Total=210 [2024-09-11 20:35:48,032 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:35:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:48,549 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2024-09-11 20:35:48,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:35:48,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-09-11 20:35:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:48,552 INFO L225 Difference]: With dead ends: 133 [2024-09-11 20:35:48,552 INFO L226 Difference]: Without dead ends: 131 [2024-09-11 20:35:48,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=90, Invalid=288, Unknown=6, NotChecked=36, Total=420 [2024-09-11 20:35:48,553 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 56 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:48,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 230 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:35:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-11 20:35:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2024-09-11 20:35:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.12987012987013) internal successors, (87), 81 states have internal predecessors, (87), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-09-11 20:35:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2024-09-11 20:35:48,592 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 43 [2024-09-11 20:35:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:48,592 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2024-09-11 20:35:48,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:35:48,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2024-09-11 20:35:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:35:48,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:48,594 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:48,613 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:35:48,794 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 20:35:48,795 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:48,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash 403352146, now seen corresponding path program 1 times [2024-09-11 20:35:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:48,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330913499] [2024-09-11 20:35:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:48,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:48,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961424551] [2024-09-11 20:35:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:48,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:48,856 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 20:35:48,857 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 20:35:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:49,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-11 20:35:49,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:49,020 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 20:35:49,025 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 20:35:49,030 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 20:35:49,038 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 20:35:49,380 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 20:35:49,385 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 20:35:49,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:35:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:35:49,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:29,829 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem7_8| Int)) (let ((.cse0 (select (select |c_#memory_int#8| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset))) (or (< (select (select |c_#memory_int#6| c_func_to_recursive_line_33_to_48_0_~q.base) c_func_to_recursive_line_33_to_48_0_~q.offset) (+ |v_func_to_recursive_line_33_to_48_0_#t~mem7_8| .cse0)) (= (let ((.cse1 (select (select |c_#memory_int#4| c_func_to_recursive_line_33_to_48_0_~r.base) c_func_to_recursive_line_33_to_48_0_~r.offset))) (+ (* |v_func_to_recursive_line_33_to_48_0_#t~mem7_8| .cse1) (* .cse0 .cse1) 1)) (* (select (select |c_#memory_int#3| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset) .cse0))))) is different from false [2024-09-11 20:36:29,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330913499] [2024-09-11 20:36:29,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961424551] [2024-09-11 20:36:29,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961424551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:29,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:29,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-11 20:36:29,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004976430] [2024-09-11 20:36:29,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:29,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:36:29,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:36:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=142, Unknown=9, NotChecked=24, Total=210 [2024-09-11 20:36:29,980 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:36:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:34,483 INFO L93 Difference]: Finished difference Result 150 states and 176 transitions. [2024-09-11 20:36:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:36:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-09-11 20:36:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:34,485 INFO L225 Difference]: With dead ends: 150 [2024-09-11 20:36:34,485 INFO L226 Difference]: Without dead ends: 148 [2024-09-11 20:36:34,487 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=61, Invalid=239, Unknown=10, NotChecked=32, Total=342 [2024-09-11 20:36:34,488 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:34,488 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 275 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:36:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-11 20:36:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2024-09-11 20:36:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 93 states have (on average 1.118279569892473) internal successors, (104), 97 states have internal predecessors, (104), 30 states have call successors, (30), 18 states have call predecessors, (30), 21 states have return successors, (35), 29 states have call predecessors, (35), 27 states have call successors, (35) [2024-09-11 20:36:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2024-09-11 20:36:34,544 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 43 [2024-09-11 20:36:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:34,545 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2024-09-11 20:36:34,545 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:36:34,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2024-09-11 20:36:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:36:34,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:34,547 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:36:34,566 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 20:36:34,747 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 20:36:34,748 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:36:34,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:34,748 INFO L85 PathProgramCache]: Analyzing trace with hash -806435587, now seen corresponding path program 1 times [2024-09-11 20:36:34,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:36:34,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752386861] [2024-09-11 20:36:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:36:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:36:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776755773] [2024-09-11 20:36:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:34,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:36:34,779 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 20:36:34,781 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 20:36:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:36:34,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 20:36:34,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:34,920 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 20:36:34,925 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 20:36:34,929 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 20:36:34,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:36:34,940 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 20:36:34,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:35,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:36:35,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:35,246 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 30 treesize of output 30 [2024-09-11 20:36:35,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:35,258 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 46 treesize of output 38 [2024-09-11 20:36:35,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:36:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:36:35,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:01,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752386861] [2024-09-11 20:37:01,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776755773] [2024-09-11 20:37:01,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776755773] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:01,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:01,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-11 20:37:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639834053] [2024-09-11 20:37:01,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:01,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 20:37:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 20:37:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=282, Unknown=5, NotChecked=0, Total=342 [2024-09-11 20:37:01,129 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:37:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:17,814 INFO L93 Difference]: Finished difference Result 153 states and 175 transitions. [2024-09-11 20:37:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:37:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2024-09-11 20:37:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:17,816 INFO L225 Difference]: With dead ends: 153 [2024-09-11 20:37:17,816 INFO L226 Difference]: Without dead ends: 151 [2024-09-11 20:37:17,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=120, Invalid=525, Unknown=5, NotChecked=0, Total=650 [2024-09-11 20:37:17,817 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:17,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-09-11 20:37:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-11 20:37:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2024-09-11 20:37:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 100 states have internal predecessors, (107), 30 states have call successors, (30), 19 states have call predecessors, (30), 22 states have return successors, (35), 29 states have call predecessors, (35), 27 states have call successors, (35) [2024-09-11 20:37:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2024-09-11 20:37:17,859 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 48 [2024-09-11 20:37:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:17,859 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2024-09-11 20:37:17,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:37:17,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:17,860 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2024-09-11 20:37:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-11 20:37:17,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:17,861 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:17,879 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 20:37:18,065 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 20:37:18,065 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:18,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:18,066 INFO L85 PathProgramCache]: Analyzing trace with hash -115614067, now seen corresponding path program 2 times [2024-09-11 20:37:18,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:18,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640748992] [2024-09-11 20:37:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:18,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:18,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148211754] [2024-09-11 20:37:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:37:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:18,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:18,116 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 20:37:18,117 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 20:37:18,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:37:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:18,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-09-11 20:37:18,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:18,388 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 20:37:18,443 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 20:37:18,502 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 20:37:18,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:18,725 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 20:37:18,840 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 20:37:18,952 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 20:37:19,062 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 20:37:30,606 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 35 treesize of output 21 [2024-09-11 20:37:30,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-11 20:37:30,776 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 13 [2024-09-11 20:37:30,917 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 20:37:34,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:37:34,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:37:34,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 20:37:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:37:36,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:37:43,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640748992] [2024-09-11 20:37:43,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:43,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148211754] [2024-09-11 20:37:43,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148211754] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:37:43,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:37:43,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-11 20:37:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394900093] [2024-09-11 20:37:43,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:43,650 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:37:43,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:43,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:37:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:37:43,651 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-11 20:38:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:17,266 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2024-09-11 20:38:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:38:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 49 [2024-09-11 20:38:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:17,270 INFO L225 Difference]: With dead ends: 248 [2024-09-11 20:38:17,270 INFO L226 Difference]: Without dead ends: 246 [2024-09-11 20:38:17,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:38:17,272 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 118 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:17,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 336 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 20.1s Time] [2024-09-11 20:38:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-09-11 20:38:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 225. [2024-09-11 20:38:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 145 states have (on average 1.110344827586207) internal successors, (161), 151 states have internal predecessors, (161), 42 states have call successors, (42), 29 states have call predecessors, (42), 37 states have return successors, (61), 44 states have call predecessors, (61), 38 states have call successors, (61) [2024-09-11 20:38:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 264 transitions. [2024-09-11 20:38:17,353 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 264 transitions. Word has length 49 [2024-09-11 20:38:17,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:17,354 INFO L474 AbstractCegarLoop]: Abstraction has 225 states and 264 transitions. [2024-09-11 20:38:17,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 9 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-11 20:38:17,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 264 transitions. [2024-09-11 20:38:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-11 20:38:17,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:17,357 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:17,368 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:38:17,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:17,558 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:17,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash -820896706, now seen corresponding path program 1 times [2024-09-11 20:38:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866375896] [2024-09-11 20:38:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:17,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818793574] [2024-09-11 20:38:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:17,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:17,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:17,609 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:38:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:17,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-11 20:38:17,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:17,853 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 20:38:17,988 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 20:38:18,126 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 20:38:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-11 20:38:25,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866375896] [2024-09-11 20:38:28,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:28,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818793574] [2024-09-11 20:38:28,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818793574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:28,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-11 20:38:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790558851] [2024-09-11 20:38:28,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:28,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:38:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:28,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:38:28,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:38:28,202 INFO L87 Difference]: Start difference. First operand 225 states and 264 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-11 20:38:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:36,988 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2024-09-11 20:38:36,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:38:36,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2024-09-11 20:38:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:36,990 INFO L225 Difference]: With dead ends: 233 [2024-09-11 20:38:36,990 INFO L226 Difference]: Without dead ends: 229 [2024-09-11 20:38:36,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:38:36,991 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:36,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 103 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-09-11 20:38:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-09-11 20:38:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2024-09-11 20:38:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 152 states have internal predecessors, (162), 42 states have call successors, (42), 30 states have call predecessors, (42), 37 states have return successors, (61), 44 states have call predecessors, (61), 38 states have call successors, (61) [2024-09-11 20:38:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 265 transitions. [2024-09-11 20:38:37,096 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 265 transitions. Word has length 54 [2024-09-11 20:38:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:37,096 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 265 transitions. [2024-09-11 20:38:37,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-11 20:38:37,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 265 transitions. [2024-09-11 20:38:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 20:38:37,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:37,098 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:37,111 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:38:37,298 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:37,299 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:37,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391166, now seen corresponding path program 2 times [2024-09-11 20:38:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:37,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249762199] [2024-09-11 20:38:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:37,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:37,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498787405] [2024-09-11 20:38:37,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:38:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:37,330 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:37,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:38:37,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:38:37,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:37,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-09-11 20:38:37,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:37,602 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 20:38:37,658 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 20:38:37,721 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 20:38:37,832 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 20:38:37,942 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 20:38:38,061 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 20:38:38,200 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 20:38:38,318 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 20:38:49,755 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 35 treesize of output 21 [2024-09-11 20:38:49,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-11 20:38:49,927 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 20:38:50,044 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 13 [2024-09-11 20:38:55,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-11 20:38:55,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:38:55,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:38:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-11 20:38:57,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 20:39:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249762199] [2024-09-11 20:39:04,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498787405] [2024-09-11 20:39:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498787405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:39:04,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:39:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-11 20:39:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953429246] [2024-09-11 20:39:04,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:04,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:39:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:39:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:39:04,927 INFO L87 Difference]: Start difference. First operand 227 states and 265 transitions. Second operand has 18 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-11 20:39:34,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-11 20:39:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:42,592 INFO L93 Difference]: Finished difference Result 306 states and 359 transitions. [2024-09-11 20:39:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:39:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 55 [2024-09-11 20:39:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:42,595 INFO L225 Difference]: With dead ends: 306 [2024-09-11 20:39:42,595 INFO L226 Difference]: Without dead ends: 304 [2024-09-11 20:39:42,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:39:42,596 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 103 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:42,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 417 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 24.4s Time] [2024-09-11 20:39:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-09-11 20:39:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 299. [2024-09-11 20:39:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 194 states have (on average 1.1030927835051547) internal successors, (214), 201 states have internal predecessors, (214), 54 states have call successors, (54), 40 states have call predecessors, (54), 50 states have return successors, (81), 57 states have call predecessors, (81), 49 states have call successors, (81) [2024-09-11 20:39:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 349 transitions. [2024-09-11 20:39:42,718 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 349 transitions. Word has length 55 [2024-09-11 20:39:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:42,718 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 349 transitions. [2024-09-11 20:39:42,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-09-11 20:39:42,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 349 transitions. [2024-09-11 20:39:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-11 20:39:42,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:42,720 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:39:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:39:42,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:39:42,920 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:42,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1477707709, now seen corresponding path program 1 times [2024-09-11 20:39:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:42,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495514239] [2024-09-11 20:39:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:42,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:42,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963444324] [2024-09-11 20:39:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:42,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:42,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:42,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:42,962 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:39:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:43,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-11 20:39:43,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:43,158 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 20:39:44,294 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 20:39:44,404 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 20:39:44,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:44,626 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 20:39:45,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:45,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7