./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:57:13,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:57:13,516 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:57:13,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:57:13,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:57:13,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:57:13,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:57:13,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:57:13,556 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:57:13,557 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:57:13,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:57:13,557 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:57:13,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:57:13,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:57:13,559 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:57:13,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:57:13,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:57:13,560 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:57:13,560 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:57:13,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:57:13,561 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:57:13,565 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:57:13,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:57:13,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:57:13,566 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:57:13,566 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:57:13,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:57:13,567 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:57:13,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:57:13,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:57:13,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:57:13,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:57:13,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:57:13,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:57:13,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:57:13,568 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:57:13,569 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:57:13,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:57:13,569 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:57:13,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:57:13,570 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:57:13,571 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:57:13,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:57:13,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:57:13,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:57:13,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:57:13,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:57:13,853 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:57:13,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-20 19:57:15,236 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:57:15,414 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:57:15,414 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-09-20 19:57:15,422 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/87557219b/740e46ea10954990a42563511bf33346/FLAG205e3ce64 [2024-09-20 19:57:15,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/87557219b/740e46ea10954990a42563511bf33346 [2024-09-20 19:57:15,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:57:15,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:57:15,439 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:57:15,440 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:57:15,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:57:15,448 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100fac10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15, skipping insertion in model container [2024-09-20 19:57:15,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,473 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:57:15,600 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-09-20 19:57:15,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:57:15,648 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:57:15,659 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c[1019,1032] [2024-09-20 19:57:15,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:57:15,705 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:57:15,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15 WrapperNode [2024-09-20 19:57:15,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:57:15,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:57:15,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:57:15,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:57:15,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,723 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,731 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:57:15,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:57:15,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:57:15,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:57:15,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:57:15,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,778 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 8, 8, 8, 8, 10, 8, 7, 7]. 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, 2, 2, 2, 2, 2, 2, 1, 1]. [2024-09-20 19:57:15,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,781 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,794 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:57:15,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:57:15,801 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:57:15,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:57:15,802 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (1/1) ... [2024-09-20 19:57:15,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:57:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:15,836 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) [2024-09-20 19:57:15,838 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 [2024-09-20 19:57:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:57:15,885 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-09-20 19:57:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-09-20 19:57:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:57:15,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:57:15,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:57:15,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:57:15,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:57:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:57:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 19:57:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 19:57:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 19:57:15,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 19:57:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 19:57:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 19:57:15,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-09-20 19:57:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 19:57:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 19:57:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 19:57:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 19:57:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:57:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:57:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 19:57:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 19:57:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 19:57:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-09-20 19:57:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:57:15,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:57:15,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:57:16,032 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:57:16,037 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:57:16,337 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-20 19:57:16,337 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:57:16,359 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:57:16,359 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:57:16,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:57:16 BoogieIcfgContainer [2024-09-20 19:57:16,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:57:16,362 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:57:16,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:57:16,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:57:16,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:57:15" (1/3) ... [2024-09-20 19:57:16,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d5f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:57:16, skipping insertion in model container [2024-09-20 19:57:16,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:57:15" (2/3) ... [2024-09-20 19:57:16,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6d5f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:57:16, skipping insertion in model container [2024-09-20 19:57:16,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:57:16" (3/3) ... [2024-09-20 19:57:16,368 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-09-20 19:57:16,381 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:57:16,381 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:57:16,425 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:57:16,430 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;@4f5fc71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:57:16,430 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:57:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 19:57:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:57:16,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:16,443 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:57:16,443 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:16,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:16,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1455850366, now seen corresponding path program 1 times [2024-09-20 19:57:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:16,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760962856] [2024-09-20 19:57:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:16,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:57:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:16,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:57:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:16,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:57:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:57:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760962856] [2024-09-20 19:57:16,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760962856] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:57:16,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:57:16,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 19:57:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258921603] [2024-09-20 19:57:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:57:16,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 19:57:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 19:57:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:57:16,767 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:57:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:16,795 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2024-09-20 19:57:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 19:57:16,798 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 19:57:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:16,806 INFO L225 Difference]: With dead ends: 84 [2024-09-20 19:57:16,807 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 19:57:16,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 19:57:16,815 INFO L434 NwaCegarLoop]: 52 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, 52 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 [2024-09-20 19:57:16,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:57:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 19:57:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-20 19:57:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:57:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-09-20 19:57:16,897 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2024-09-20 19:57:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:16,897 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-09-20 19:57:16,898 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:57:16,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-09-20 19:57:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:57:16,905 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:16,905 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:57:16,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:57:16,906 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:16,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1951833606, now seen corresponding path program 1 times [2024-09-20 19:57:16,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:16,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946026184] [2024-09-20 19:57:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:16,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:17,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341647260] [2024-09-20 19:57:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:17,017 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) [2024-09-20 19:57:17,018 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:57:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:17,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:57:17,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:17,323 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 [2024-09-20 19:57:17,336 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 [2024-09-20 19:57:17,347 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 [2024-09-20 19:57:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:57:17,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:57:17,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946026184] [2024-09-20 19:57:17,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:57:17,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341647260] [2024-09-20 19:57:17,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341647260] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:57:17,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:57:17,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:57:17,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568470811] [2024-09-20 19:57:17,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:57:17,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:57:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:57:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:57:17,538 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:57:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:17,834 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2024-09-20 19:57:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:57:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-20 19:57:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:17,840 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:57:17,840 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:57:17,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:57:17,843 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:17,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 217 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:57:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:57:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2024-09-20 19:57:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 19:57:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2024-09-20 19:57:17,877 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 24 [2024-09-20 19:57:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:17,877 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2024-09-20 19:57:17,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 19:57:17,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2024-09-20 19:57:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 19:57:17,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:17,879 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, 1, 1, 1, 1] [2024-09-20 19:57:17,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:57:18,081 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 [2024-09-20 19:57:18,082 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:18,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1266928978, now seen corresponding path program 1 times [2024-09-20 19:57:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:18,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125270926] [2024-09-20 19:57:18,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:18,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:18,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243512691] [2024-09-20 19:57:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:18,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:18,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:18,162 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) [2024-09-20 19:57:18,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:57:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:18,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-20 19:57:18,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:18,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 19:57:18,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 19:57:18,444 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 [2024-09-20 19:57:18,458 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 [2024-09-20 19:57:18,467 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 [2024-09-20 19:57:18,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:57:18,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-20 19:57:18,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 19:57:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:57:18,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:57:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:57:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:19,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125270926] [2024-09-20 19:57:19,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:57:19,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243512691] [2024-09-20 19:57:19,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243512691] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:57:19,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:57:19,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 18 [2024-09-20 19:57:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003132180] [2024-09-20 19:57:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:57:19,217 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:57:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:57:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:57:19,219 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:57:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:19,848 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-09-20 19:57:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:57:19,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2024-09-20 19:57:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:19,850 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:57:19,853 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 19:57:19,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:57:19,854 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:19,855 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 225 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:57:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 19:57:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-09-20 19:57:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 17 states have call successors, (17), 8 states have call predecessors, (17), 8 states have return successors, (19), 15 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-20 19:57:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2024-09-20 19:57:19,879 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 30 [2024-09-20 19:57:19,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:19,879 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2024-09-20 19:57:19,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 19:57:19,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2024-09-20 19:57:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:57:19,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:19,882 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:57:19,900 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:57:20,086 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 [2024-09-20 19:57:20,087 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:20,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1236409500, now seen corresponding path program 1 times [2024-09-20 19:57:20,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:20,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807900941] [2024-09-20 19:57:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:20,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:20,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246673901] [2024-09-20 19:57:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:20,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:20,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:20,130 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) [2024-09-20 19:57:20,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:57:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:20,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-20 19:57:20,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:20,285 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 [2024-09-20 19:57:20,323 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 [2024-09-20 19:57:20,329 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 [2024-09-20 19:57:20,337 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 [2024-09-20 19:57:20,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:57:20,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-20 19:57:20,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 19:57:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:57:20,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:57:20,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-09-20 19:57:20,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:20,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807900941] [2024-09-20 19:57:20,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:57:20,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246673901] [2024-09-20 19:57:20,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246673901] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:57:20,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:57:20,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-20 19:57:20,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301246684] [2024-09-20 19:57:20,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:57:20,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 19:57:20,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 19:57:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:57:20,981 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:57:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:21,630 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2024-09-20 19:57:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:57:21,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-09-20 19:57:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:21,633 INFO L225 Difference]: With dead ends: 128 [2024-09-20 19:57:21,633 INFO L226 Difference]: Without dead ends: 126 [2024-09-20 19:57:21,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:57:21,634 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:21,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 218 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:57:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-20 19:57:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2024-09-20 19:57:21,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 75 states have internal predecessors, (81), 28 states have call successors, (28), 14 states have call predecessors, (28), 15 states have return successors, (32), 26 states have call predecessors, (32), 25 states have call successors, (32) [2024-09-20 19:57:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2024-09-20 19:57:21,686 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 36 [2024-09-20 19:57:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:21,687 INFO L474 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2024-09-20 19:57:21,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:57:21,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2024-09-20 19:57:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:57:21,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:21,689 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, 1, 1, 1, 1] [2024-09-20 19:57:21,707 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 19:57:21,889 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 [2024-09-20 19:57:21,890 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:21,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash -598293826, now seen corresponding path program 1 times [2024-09-20 19:57:21,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:21,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073523749] [2024-09-20 19:57:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:21,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:57:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:57:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:57:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 19:57:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:57:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 19:57:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 19:57:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:57:22,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073523749] [2024-09-20 19:57:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073523749] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:57:22,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:57:22,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-20 19:57:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530792360] [2024-09-20 19:57:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:57:22,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:57:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:57:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:57:22,424 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:57:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:22,900 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2024-09-20 19:57:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:57:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-20 19:57:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:22,903 INFO L225 Difference]: With dead ends: 127 [2024-09-20 19:57:22,903 INFO L226 Difference]: Without dead ends: 125 [2024-09-20 19:57:22,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:57:22,906 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:22,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:57:22,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-20 19:57:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-20 19:57:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 16 states have call predecessors, (28), 18 states have return successors, (33), 26 states have call predecessors, (33), 25 states have call successors, (33) [2024-09-20 19:57:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2024-09-20 19:57:22,955 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 46 [2024-09-20 19:57:22,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:22,956 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2024-09-20 19:57:22,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:57:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2024-09-20 19:57:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 19:57:22,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:22,959 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, 1, 1, 1, 1] [2024-09-20 19:57:22,961 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 19:57:22,961 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:22,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash 729356253, now seen corresponding path program 1 times [2024-09-20 19:57:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124878125] [2024-09-20 19:57:22,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:22,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:23,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896530238] [2024-09-20 19:57:23,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:23,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:23,011 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) [2024-09-20 19:57:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:57:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:23,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-20 19:57:23,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:23,190 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 [2024-09-20 19:57:23,194 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 [2024-09-20 19:57:23,199 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 [2024-09-20 19:57:23,205 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 [2024-09-20 19:57:23,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 19:57:23,570 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 [2024-09-20 19:57:23,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:57:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:57:23,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:57:46,197 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_33_to_48_0_#t~mem6_8| Int)) (let ((.cse1 (select (select |c_#memory_int#1| c_func_to_recursive_line_33_to_48_0_~s.base) c_func_to_recursive_line_33_to_48_0_~s.offset))) (or (= (let ((.cse0 (select (select |c_#memory_int#4| 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~mem6_8| .cse0) (* .cse1 .cse0) 1)) (* (select (select |c_#memory_int#2| c_func_to_recursive_line_33_to_48_0_~p.base) c_func_to_recursive_line_33_to_48_0_~p.offset) .cse1)) (< (select (select |c_#memory_int#6| 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~mem6_8| .cse1))))) is different from false [2024-09-20 19:57:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124878125] [2024-09-20 19:57:46,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:57:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896530238] [2024-09-20 19:57:46,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896530238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:57:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:57:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-20 19:57:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944125191] [2024-09-20 19:57:46,290 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:57:46,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 19:57:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 19:57:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=5, NotChecked=24, Total=210 [2024-09-20 19:57:46,291 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:57:46,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:46,697 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2024-09-20 19:57:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:57:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2024-09-20 19:57:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:46,700 INFO L225 Difference]: With dead ends: 156 [2024-09-20 19:57:46,700 INFO L226 Difference]: Without dead ends: 154 [2024-09-20 19:57:46,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=61, Invalid=244, Unknown=5, NotChecked=32, Total=342 [2024-09-20 19:57:46,705 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 44 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:46,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 258 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:57:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-20 19:57:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 149. [2024-09-20 19:57:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 98 states have internal predecessors, (105), 32 states have call successors, (32), 20 states have call predecessors, (32), 22 states have return successors, (36), 30 states have call predecessors, (36), 28 states have call successors, (36) [2024-09-20 19:57:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 173 transitions. [2024-09-20 19:57:46,760 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 173 transitions. Word has length 47 [2024-09-20 19:57:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:46,761 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 173 transitions. [2024-09-20 19:57:46,762 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-20 19:57:46,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 173 transitions. [2024-09-20 19:57:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 19:57:46,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:46,764 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, 1, 1, 1, 1] [2024-09-20 19:57:46,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:57:46,968 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 [2024-09-20 19:57:46,969 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:46,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 183627405, now seen corresponding path program 1 times [2024-09-20 19:57:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:46,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316112064] [2024-09-20 19:57:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:47,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083388761] [2024-09-20 19:57:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:47,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:47,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:47,002 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) [2024-09-20 19:57:47,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:57:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:47,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 19:57:47,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:47,189 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 [2024-09-20 19:57:47,245 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 [2024-09-20 19:57:47,251 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 [2024-09-20 19:57:47,259 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 [2024-09-20 19:57:47,269 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 [2024-09-20 19:57:47,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:57:47,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:57:47,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:57:47,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:57:47,822 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 41 treesize of output 37 [2024-09-20 19:57:47,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:57:47,835 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 [2024-09-20 19:57:47,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:57:47,849 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 29 treesize of output 25 [2024-09-20 19:57:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:57:47,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316112064] [2024-09-20 19:58:10,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083388761] [2024-09-20 19:58:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083388761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:10,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:58:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-20 19:58:10,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527538420] [2024-09-20 19:58:10,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:10,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:58:10,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:10,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:58:10,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=471, Unknown=5, NotChecked=0, Total=552 [2024-09-20 19:58:10,171 INFO L87 Difference]: Start difference. First operand 149 states and 173 transitions. Second operand has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 19:58:14,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:21,775 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2024-09-20 19:58:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:58:21,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2024-09-20 19:58:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:21,778 INFO L225 Difference]: With dead ends: 161 [2024-09-20 19:58:21,778 INFO L226 Difference]: Without dead ends: 159 [2024-09-20 19:58:21,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=177, Invalid=1008, Unknown=5, NotChecked=0, Total=1190 [2024-09-20 19:58:21,779 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 31 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:21,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 151 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 493 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2024-09-20 19:58:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-20 19:58:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2024-09-20 19:58:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.11) internal successors, (111), 104 states have internal predecessors, (111), 32 states have call successors, (32), 22 states have call predecessors, (32), 24 states have return successors, (36), 30 states have call predecessors, (36), 28 states have call successors, (36) [2024-09-20 19:58:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2024-09-20 19:58:21,827 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 52 [2024-09-20 19:58:21,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:21,827 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2024-09-20 19:58:21,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 19:58:21,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:21,828 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2024-09-20 19:58:21,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:58:21,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:21,829 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, 1, 1, 1, 1] [2024-09-20 19:58:21,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:58:22,029 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 19:58:22,030 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:22,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:22,032 INFO L85 PathProgramCache]: Analyzing trace with hash -528266775, now seen corresponding path program 2 times [2024-09-20 19:58:22,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:22,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13227901] [2024-09-20 19:58:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:22,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:22,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628513830] [2024-09-20 19:58:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:58:22,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:22,085 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) [2024-09-20 19:58:22,087 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:58:22,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:58:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:58:22,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-09-20 19:58:22,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:22,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 19:58:22,340 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 [2024-09-20 19:58:22,362 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 [2024-09-20 19:58:22,399 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 [2024-09-20 19:58:22,432 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 [2024-09-20 19:58:22,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:58:22,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:58:22,536 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 [2024-09-20 19:58:26,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 19:58:26,261 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 [2024-09-20 19:58:26,296 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 [2024-09-20 19:58:26,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-09-20 19:58:26,351 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 [2024-09-20 19:58:27,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:58:27,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:58:27,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 19:58:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:58:28,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:58:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13227901] [2024-09-20 19:58:30,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628513830] [2024-09-20 19:58:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628513830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:58:30,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:58:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-20 19:58:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651905142] [2024-09-20 19:58:30,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:30,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:58:30,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:58:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:58:30,674 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 19:58:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:42,422 INFO L93 Difference]: Finished difference Result 256 states and 300 transitions. [2024-09-20 19:58:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 19:58:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 53 [2024-09-20 19:58:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:42,426 INFO L225 Difference]: With dead ends: 256 [2024-09-20 19:58:42,426 INFO L226 Difference]: Without dead ends: 254 [2024-09-20 19:58:42,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:58:42,428 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 130 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:42,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 391 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2024-09-20 19:58:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-20 19:58:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 233. [2024-09-20 19:58:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 155 states have internal predecessors, (165), 44 states have call successors, (44), 32 states have call predecessors, (44), 39 states have return successors, (62), 45 states have call predecessors, (62), 39 states have call successors, (62) [2024-09-20 19:58:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 271 transitions. [2024-09-20 19:58:42,537 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 271 transitions. Word has length 53 [2024-09-20 19:58:42,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:42,538 INFO L474 AbstractCegarLoop]: Abstraction has 233 states and 271 transitions. [2024-09-20 19:58:42,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2024-09-20 19:58:42,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 271 transitions. [2024-09-20 19:58:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 19:58:42,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:42,539 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, 1, 1, 1, 1] [2024-09-20 19:58:42,549 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:58:42,740 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 [2024-09-20 19:58:42,740 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:42,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash 250711066, now seen corresponding path program 1 times [2024-09-20 19:58:42,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:42,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689514044] [2024-09-20 19:58:42,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:42,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:42,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284464967] [2024-09-20 19:58:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:42,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:42,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:42,789 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) [2024-09-20 19:58:42,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:58:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:42,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 19:58:42,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:42,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:58:42,988 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 [2024-09-20 19:58:43,021 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 [2024-09-20 19:58:43,053 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 [2024-09-20 19:58:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 19:58:45,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:46,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:46,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689514044] [2024-09-20 19:58:46,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:46,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284464967] [2024-09-20 19:58:46,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284464967] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:46,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:58:46,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 19:58:46,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907320458] [2024-09-20 19:58:46,993 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:46,993 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:58:46,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:58:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:58:46,994 INFO L87 Difference]: Start difference. First operand 233 states and 271 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 19:58:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:49,541 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2024-09-20 19:58:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:58:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-20 19:58:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:49,544 INFO L225 Difference]: With dead ends: 241 [2024-09-20 19:58:49,544 INFO L226 Difference]: Without dead ends: 237 [2024-09-20 19:58:49,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:58:49,545 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:49,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 19:58:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-09-20 19:58:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2024-09-20 19:58:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 151 states have (on average 1.099337748344371) internal successors, (166), 156 states have internal predecessors, (166), 44 states have call successors, (44), 33 states have call predecessors, (44), 39 states have return successors, (62), 45 states have call predecessors, (62), 39 states have call successors, (62) [2024-09-20 19:58:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 272 transitions. [2024-09-20 19:58:49,648 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 272 transitions. Word has length 58 [2024-09-20 19:58:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:49,649 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 272 transitions. [2024-09-20 19:58:49,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 19:58:49,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:49,649 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 272 transitions. [2024-09-20 19:58:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 19:58:49,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:49,650 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, 1, 1, 1, 1] [2024-09-20 19:58:49,671 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 19:58:49,850 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 [2024-09-20 19:58:49,851 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:49,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1798650033, now seen corresponding path program 1 times [2024-09-20 19:58:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963874952] [2024-09-20 19:58:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:58:49,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96864719] [2024-09-20 19:58:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:49,892 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) [2024-09-20 19:58:49,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:58:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:50,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 175 conjuncts are in the unsatisfiable core [2024-09-20 19:58:50,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:50,100 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 [2024-09-20 19:58:50,115 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 [2024-09-20 19:58:50,134 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 [2024-09-20 19:58:50,164 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 [2024-09-20 19:58:50,197 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 [2024-09-20 19:58:50,228 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 [2024-09-20 19:58:50,261 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 [2024-09-20 19:58:50,296 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 [2024-09-20 19:58:53,870 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 [2024-09-20 19:58:53,899 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 [2024-09-20 19:58:53,945 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 58 treesize of output 36 [2024-09-20 19:58:54,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:58:56,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2024-09-20 19:58:56,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-09-20 19:58:56,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2024-09-20 19:58:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 19:58:56,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-20 19:59:00,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:00,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963874952] [2024-09-20 19:59:00,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:00,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96864719] [2024-09-20 19:59:00,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96864719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:59:00,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:59:00,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2024-09-20 19:59:00,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417566231] [2024-09-20 19:59:00,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:00,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:59:00,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:00,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:59:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:59:00,687 INFO L87 Difference]: Start difference. First operand 235 states and 272 transitions. Second operand has 22 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:59:19,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-20 19:59:22,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-20 19:59:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:28,603 INFO L93 Difference]: Finished difference Result 328 states and 384 transitions. [2024-09-20 19:59:28,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 19:59:28,604 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 59 [2024-09-20 19:59:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:28,606 INFO L225 Difference]: With dead ends: 328 [2024-09-20 19:59:28,606 INFO L226 Difference]: Without dead ends: 326 [2024-09-20 19:59:28,607 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 19:59:28,608 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 139 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:28,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 458 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2024-09-20 19:59:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-09-20 19:59:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2024-09-20 19:59:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 207 states have (on average 1.106280193236715) internal successors, (229), 215 states have internal predecessors, (229), 60 states have call successors, (60), 44 states have call predecessors, (60), 54 states have return successors, (89), 62 states have call predecessors, (89), 54 states have call successors, (89) [2024-09-20 19:59:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2024-09-20 19:59:28,742 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 59 [2024-09-20 19:59:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:28,742 INFO L474 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2024-09-20 19:59:28,743 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-20 19:59:28,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2024-09-20 19:59:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 19:59:28,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:28,747 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, 1, 1, 1, 1] [2024-09-20 19:59:28,765 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 19:59:28,948 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 [2024-09-20 19:59:28,949 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:28,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 811390181, now seen corresponding path program 1 times [2024-09-20 19:59:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:28,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804124735] [2024-09-20 19:59:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:28,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876999603] [2024-09-20 19:59:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:28,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:28,996 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) [2024-09-20 19:59:28,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:59:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:29,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 19:59:29,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:29,163 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 [2024-09-20 19:59:29,184 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 [2024-09-20 19:59:29,223 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 [2024-09-20 19:59:29,266 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 [2024-09-20 19:59:29,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:59:31,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 19:59:31,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 19:59:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:59:31,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:32,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:32,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804124735] [2024-09-20 19:59:32,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:32,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876999603] [2024-09-20 19:59:32,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876999603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:59:32,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:59:32,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 19:59:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741993672] [2024-09-20 19:59:32,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:32,153 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:59:32,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:32,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:59:32,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:59:32,154 INFO L87 Difference]: Start difference. First operand 322 states and 378 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-20 19:59:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:35,222 INFO L93 Difference]: Finished difference Result 337 states and 398 transitions. [2024-09-20 19:59:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:59:35,223 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2024-09-20 19:59:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:35,225 INFO L225 Difference]: With dead ends: 337 [2024-09-20 19:59:35,225 INFO L226 Difference]: Without dead ends: 305 [2024-09-20 19:59:35,226 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:59:35,226 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:35,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 82 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 19:59:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-20 19:59:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 299. [2024-09-20 19:59:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 200 states have internal predecessors, (212), 56 states have call successors, (56), 40 states have call predecessors, (56), 51 states have return successors, (91), 58 states have call predecessors, (91), 51 states have call successors, (91) [2024-09-20 19:59:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 359 transitions. [2024-09-20 19:59:35,386 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 359 transitions. Word has length 64 [2024-09-20 19:59:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:35,386 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 359 transitions. [2024-09-20 19:59:35,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-20 19:59:35,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 359 transitions. [2024-09-20 19:59:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-20 19:59:35,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:35,388 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 19:59:35,588 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 [2024-09-20 19:59:35,589 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:35,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1078995484, now seen corresponding path program 1 times [2024-09-20 19:59:35,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:35,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828098158] [2024-09-20 19:59:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:35,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787078749] [2024-09-20 19:59:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:35,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:35,643 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) [2024-09-20 19:59:35,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:59:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:35,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-09-20 19:59:35,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:35,877 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 [2024-09-20 19:59:35,917 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 [2024-09-20 19:59:35,958 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 [2024-09-20 19:59:35,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:38,315 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 [2024-09-20 19:59:38,351 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 [2024-09-20 19:59:40,941 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 [2024-09-20 19:59:40,975 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 [2024-09-20 19:59:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:59:42,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-20 19:59:44,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:44,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828098158] [2024-09-20 19:59:44,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:44,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787078749] [2024-09-20 19:59:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787078749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:59:44,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:59:44,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2024-09-20 19:59:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045097507] [2024-09-20 19:59:44,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:44,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:59:44,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:59:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:59:44,106 INFO L87 Difference]: Start difference. First operand 299 states and 359 transitions. Second operand has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-20 19:59:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:52,458 INFO L93 Difference]: Finished difference Result 349 states and 423 transitions. [2024-09-20 19:59:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 19:59:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2024-09-20 19:59:52,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:52,461 INFO L225 Difference]: With dead ends: 349 [2024-09-20 19:59:52,461 INFO L226 Difference]: Without dead ends: 347 [2024-09-20 19:59:52,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:59:52,463 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:52,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 468 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-09-20 19:59:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-09-20 19:59:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 309. [2024-09-20 19:59:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 198 states have (on average 1.106060606060606) internal successors, (219), 208 states have internal predecessors, (219), 56 states have call successors, (56), 42 states have call predecessors, (56), 54 states have return successors, (97), 58 states have call predecessors, (97), 52 states have call successors, (97) [2024-09-20 19:59:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 372 transitions. [2024-09-20 19:59:52,617 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 372 transitions. Word has length 70 [2024-09-20 19:59:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:52,617 INFO L474 AbstractCegarLoop]: Abstraction has 309 states and 372 transitions. [2024-09-20 19:59:52,618 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 9 states have call successors, (20), 8 states have call predecessors, (20), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-20 19:59:52,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 372 transitions. [2024-09-20 19:59:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 19:59:52,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:52,619 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:52,634 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 19:59:52,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 19:59:52,824 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:52,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -538069386, now seen corresponding path program 1 times [2024-09-20 19:59:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:52,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571286452] [2024-09-20 19:59:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:52,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:52,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546933626] [2024-09-20 19:59:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:52,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:52,874 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:59:52,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:59:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:53,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-09-20 19:59:53,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:53,082 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 [2024-09-20 19:59:53,383 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 [2024-09-20 19:59:53,412 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 [2024-09-20 19:59:53,443 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 11 [2024-09-20 19:59:53,474 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 [2024-09-20 19:59:53,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:53,539 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 [2024-09-20 19:59:53,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:53,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:00:00,214 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 [2024-09-20 20:00:00,308 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 [2024-09-20 20:00:00,342 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 [2024-09-20 20:00:00,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 20:00:02,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:00:02,720 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 43 treesize of output 39 [2024-09-20 20:00:02,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:00:02,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:00:02,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 64 [2024-09-20 20:00:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 20:00:03,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571286452] [2024-09-20 20:00:11,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546933626] [2024-09-20 20:00:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546933626] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:11,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-20 20:00:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830314274] [2024-09-20 20:00:11,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:11,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 20:00:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 20:00:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-09-20 20:00:11,776 INFO L87 Difference]: Start difference. First operand 309 states and 372 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 20:00:16,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:00:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:25,006 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2024-09-20 20:00:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 20:00:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-09-20 20:00:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:25,008 INFO L225 Difference]: With dead ends: 333 [2024-09-20 20:00:25,008 INFO L226 Difference]: Without dead ends: 329 [2024-09-20 20:00:25,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 20:00:25,009 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:25,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 198 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 727 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2024-09-20 20:00:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-09-20 20:00:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2024-09-20 20:00:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 209 states have (on average 1.1004784688995215) internal successors, (230), 218 states have internal predecessors, (230), 59 states have call successors, (59), 45 states have call predecessors, (59), 56 states have return successors, (99), 61 states have call predecessors, (99), 54 states have call successors, (99) [2024-09-20 20:00:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 388 transitions. [2024-09-20 20:00:25,237 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 388 transitions. Word has length 77 [2024-09-20 20:00:25,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:25,237 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 388 transitions. [2024-09-20 20:00:25,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 20:00:25,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:25,238 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 388 transitions. [2024-09-20 20:00:25,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 20:00:25,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:25,239 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:25,259 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 20:00:25,439 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:25,440 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:25,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1567428684, now seen corresponding path program 1 times [2024-09-20 20:00:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867523527] [2024-09-20 20:00:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416350981] [2024-09-20 20:00:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:25,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:25,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:25,483 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:00:25,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 20:00:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:25,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 20:00:25,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:25,670 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 [2024-09-20 20:00:25,700 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 [2024-09-20 20:00:25,729 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 [2024-09-20 20:00:25,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 20:00:27,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 20:00:27,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 20:00:27,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 20:00:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-20 20:00:28,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867523527] [2024-09-20 20:00:29,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416350981] [2024-09-20 20:00:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416350981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:29,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-20 20:00:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882454219] [2024-09-20 20:00:29,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:29,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 20:00:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 20:00:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-20 20:00:29,230 INFO L87 Difference]: Start difference. First operand 325 states and 388 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 20:00:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:33,830 INFO L93 Difference]: Finished difference Result 385 states and 453 transitions. [2024-09-20 20:00:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 20:00:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 77 [2024-09-20 20:00:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:33,833 INFO L225 Difference]: With dead ends: 385 [2024-09-20 20:00:33,833 INFO L226 Difference]: Without dead ends: 383 [2024-09-20 20:00:33,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-09-20 20:00:33,834 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 28 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:33,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 181 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 422 Invalid, 2 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 20:00:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-20 20:00:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 357. [2024-09-20 20:00:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 230 states have (on average 1.0956521739130434) internal successors, (252), 239 states have internal predecessors, (252), 63 states have call successors, (63), 50 states have call predecessors, (63), 63 states have return successors, (105), 67 states have call predecessors, (105), 57 states have call successors, (105) [2024-09-20 20:00:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 420 transitions. [2024-09-20 20:00:34,029 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 420 transitions. Word has length 77 [2024-09-20 20:00:34,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:34,030 INFO L474 AbstractCegarLoop]: Abstraction has 357 states and 420 transitions. [2024-09-20 20:00:34,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2024-09-20 20:00:34,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 420 transitions. [2024-09-20 20:00:34,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 20:00:34,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:34,032 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:34,050 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 20:00:34,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 20:00:34,233 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:34,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 424149315, now seen corresponding path program 1 times [2024-09-20 20:00:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705568114] [2024-09-20 20:00:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:34,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402160207] [2024-09-20 20:00:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:34,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:34,291 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:00:34,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 20:00:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:34,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 20:00:34,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:34,508 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 [2024-09-20 20:00:34,542 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 [2024-09-20 20:00:34,572 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 [2024-09-20 20:00:34,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:00:37,794 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 [2024-09-20 20:00:37,838 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 [2024-09-20 20:00:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 20:00:39,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:43,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2024-09-20 20:00:43,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-09-20 20:00:43,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-20 20:00:43,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-20 20:00:52,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705568114] [2024-09-20 20:00:52,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402160207] [2024-09-20 20:00:52,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402160207] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:52,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:52,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-20 20:00:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483900371] [2024-09-20 20:00:52,013 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:52,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 20:00:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 20:00:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=196, Unknown=2, NotChecked=0, Total=240 [2024-09-20 20:00:52,015 INFO L87 Difference]: Start difference. First operand 357 states and 420 transitions. Second operand has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 20:00:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:55,393 INFO L93 Difference]: Finished difference Result 361 states and 424 transitions. [2024-09-20 20:00:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 20:00:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 83 [2024-09-20 20:00:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:55,396 INFO L225 Difference]: With dead ends: 361 [2024-09-20 20:00:55,396 INFO L226 Difference]: Without dead ends: 339 [2024-09-20 20:00:55,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=71, Invalid=307, Unknown=2, NotChecked=0, Total=380 [2024-09-20 20:00:55,397 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:55,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 123 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2024-09-20 20:00:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-09-20 20:00:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2024-09-20 20:00:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 217 states have (on average 1.096774193548387) internal successors, (238), 226 states have internal predecessors, (238), 60 states have call successors, (60), 47 states have call predecessors, (60), 59 states have return successors, (101), 63 states have call predecessors, (101), 55 states have call successors, (101) [2024-09-20 20:00:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 399 transitions. [2024-09-20 20:00:55,600 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 399 transitions. Word has length 83 [2024-09-20 20:00:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:55,600 INFO L474 AbstractCegarLoop]: Abstraction has 337 states and 399 transitions. [2024-09-20 20:00:55,601 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 20:00:55,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 399 transitions. [2024-09-20 20:00:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 20:00:55,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:55,602 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:55,615 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 20:00:55,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 20:00:55,803 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1625238527, now seen corresponding path program 1 times [2024-09-20 20:00:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386730915] [2024-09-20 20:00:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:55,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713067430] [2024-09-20 20:00:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:55,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:55,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:55,837 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:00:55,838 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 20:00:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:56,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-20 20:00:56,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:56,074 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 [2024-09-20 20:00:56,104 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 [2024-09-20 20:00:56,133 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 [2024-09-20 20:00:56,163 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 [2024-09-20 20:00:59,213 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 [2024-09-20 20:00:59,263 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 36 treesize of output 13 [2024-09-20 20:01:00,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 20:01:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 20:01:01,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386730915] [2024-09-20 20:01:01,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713067430] [2024-09-20 20:01:01,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713067430] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:01,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:01,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-20 20:01:01,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884009823] [2024-09-20 20:01:01,785 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:01,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 20:01:01,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:01,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 20:01:01,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-20 20:01:01,786 INFO L87 Difference]: Start difference. First operand 337 states and 399 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 20:01:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:05,513 INFO L93 Difference]: Finished difference Result 367 states and 432 transitions. [2024-09-20 20:01:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 20:01:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 83 [2024-09-20 20:01:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:05,516 INFO L225 Difference]: With dead ends: 367 [2024-09-20 20:01:05,516 INFO L226 Difference]: Without dead ends: 363 [2024-09-20 20:01:05,517 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-20 20:01:05,517 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:05,518 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 122 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-20 20:01:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-09-20 20:01:05,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2024-09-20 20:01:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 232 states have (on average 1.0905172413793103) internal successors, (253), 240 states have internal predecessors, (253), 64 states have call successors, (64), 51 states have call predecessors, (64), 62 states have return successors, (104), 67 states have call predecessors, (104), 58 states have call successors, (104) [2024-09-20 20:01:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 421 transitions. [2024-09-20 20:01:05,734 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 421 transitions. Word has length 83 [2024-09-20 20:01:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:05,735 INFO L474 AbstractCegarLoop]: Abstraction has 359 states and 421 transitions. [2024-09-20 20:01:05,735 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2024-09-20 20:01:05,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 421 transitions. [2024-09-20 20:01:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-20 20:01:05,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:05,736 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:05,755 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 20:01:05,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 20:01:05,937 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:05,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 930763660, now seen corresponding path program 1 times [2024-09-20 20:01:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295998987] [2024-09-20 20:01:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548976623] [2024-09-20 20:01:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:05,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:05,979 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 20:01:05,982 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 20:01:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:01:06,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-09-20 20:01:06,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:06,687 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 [2024-09-20 20:01:06,716 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 [2024-09-20 20:01:06,746 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 [2024-09-20 20:01:06,775 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 [2024-09-20 20:01:06,806 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 [2024-09-20 20:01:06,843 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 [2024-09-20 20:01:07,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:01:07,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select 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 [2024-09-20 20:01:14,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-09-20 20:01:14,956 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 58 treesize of output 36 [2024-09-20 20:01:15,055 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 [2024-09-20 20:01:15,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2024-09-20 20:01:21,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:01:21,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-09-20 20:01:21,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:01:21,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 106 [2024-09-20 20:01:21,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:01:21,664 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 65 treesize of output 49 [2024-09-20 20:01:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 75 proven. 38 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-20 20:01:22,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295998987] [2024-09-20 20:01:30,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548976623] [2024-09-20 20:01:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548976623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:30,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 20:01:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66841964] [2024-09-20 20:01:30,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:30,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 20:01:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 20:01:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 20:01:30,625 INFO L87 Difference]: Start difference. First operand 359 states and 421 transitions. Second operand has 25 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 10 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-20 20:01:34,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]