./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum_array-2-2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/loops/sum_array-2-2.i -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 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 21:00:50,894 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 21:00:50,977 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 21:00:50,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 21:00:50,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 21:00:51,016 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 21:00:51,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 21:00:51,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 21:00:51,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 21:00:51,022 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 21:00:51,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 21:00:51,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 21:00:51,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 21:00:51,025 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 21:00:51,028 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 21:00:51,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 21:00:51,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 21:00:51,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 21:00:51,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 21:00:51,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 21:00:51,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 21:00:51,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 21:00:51,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 21:00:51,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 21:00:51,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 21:00:51,031 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 21:00:51,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 21:00:51,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 21:00:51,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 21:00:51,033 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 21:00:51,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 21:00:51,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 21:00:51,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:00:51,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 21:00:51,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 21:00:51,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 21:00:51,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 21:00:51,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 21:00:51,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 21:00:51,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 21:00:51,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 21:00:51,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 21:00:51,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cf9175e436d0e00a51b884dabf87739d3176e3315a908e56fcba99730a10796 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 21:00:51,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 21:00:51,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 21:00:51,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 21:00:51,360 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 21:00:51,360 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 21:00:51,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/sum_array-2-2.i [2024-09-12 21:00:52,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 21:00:53,074 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 21:00:53,075 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/sum_array-2-2.i [2024-09-12 21:00:53,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/573633327/2fda5047e965475a8bb22cad7b763b34/FLAG1945bfa63 [2024-09-12 21:00:53,451 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/573633327/2fda5047e965475a8bb22cad7b763b34 [2024-09-12 21:00:53,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 21:00:53,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 21:00:53,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 21:00:53,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 21:00:53,462 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 21:00:53,463 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6297b9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53, skipping insertion in model container [2024-09-12 21:00:53,464 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,484 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 21:00:53,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/sum_array-2-2.i[940,953] [2024-09-12 21:00:53,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:00:53,661 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 21:00:53,673 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/sum_array-2-2.i[940,953] [2024-09-12 21:00:53,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:00:53,714 INFO L204 MainTranslator]: Completed translation [2024-09-12 21:00:53,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53 WrapperNode [2024-09-12 21:00:53,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 21:00:53,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 21:00:53,717 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 21:00:53,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 21:00:53,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,746 INFO L138 Inliner]: procedures = 18, calls = 37, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 21:00:53,747 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 21:00:53,747 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 21:00:53,747 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 21:00:53,748 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 21:00:53,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,762 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,779 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 2, 5]. 36 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-09-12 21:00:53,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,780 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,813 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 21:00:53,814 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 21:00:53,814 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 21:00:53,814 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 21:00:53,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (1/1) ... [2024-09-12 21:00:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:00:53,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:00:53,853 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) [2024-09-12 21:00:53,855 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 [2024-09-12 21:00:53,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 21:00:53,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-12 21:00:53,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-12 21:00:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-12 21:00:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-12 21:00:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-12 21:00:53,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 21:00:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 21:00:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 21:00:53,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 21:00:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-12 21:00:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-12 21:00:53,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-12 21:00:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-12 21:00:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 21:00:53,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 21:00:53,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-12 21:00:54,001 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 21:00:54,006 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 21:00:54,221 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-09-12 21:00:54,222 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 21:00:54,247 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 21:00:54,248 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-12 21:00:54,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:00:54 BoogieIcfgContainer [2024-09-12 21:00:54,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 21:00:54,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 21:00:54,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 21:00:54,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 21:00:54,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 09:00:53" (1/3) ... [2024-09-12 21:00:54,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26954f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:00:54, skipping insertion in model container [2024-09-12 21:00:54,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:00:53" (2/3) ... [2024-09-12 21:00:54,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26954f18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:00:54, skipping insertion in model container [2024-09-12 21:00:54,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:00:54" (3/3) ... [2024-09-12 21:00:54,258 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_array-2-2.i [2024-09-12 21:00:54,272 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 21:00:54,272 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 21:00:54,329 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 21:00:54,338 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;@475de6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 21:00:54,338 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 21:00:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:00:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 21:00:54,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:00:54,352 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:00:54,353 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:00:54,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash 868990998, now seen corresponding path program 1 times [2024-09-12 21:00:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:00:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671250195] [2024-09-12 21:00:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:00:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:54,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:00:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:00:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:00:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671250195] [2024-09-12 21:00:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671250195] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:00:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:00:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 21:00:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095490102] [2024-09-12 21:00:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:00:54,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 21:00:54,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:00:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 21:00:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 21:00:54,603 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:00:54,647 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2024-09-12 21:00:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 21:00:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 21:00:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:00:54,658 INFO L225 Difference]: With dead ends: 51 [2024-09-12 21:00:54,658 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 21:00:54,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 21:00:54,665 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:00:54,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:00:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 21:00:54,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-12 21:00:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 21:00:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-09-12 21:00:54,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2024-09-12 21:00:54,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:00:54,700 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-09-12 21:00:54,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:54,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-09-12 21:00:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-12 21:00:54,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:00:54,702 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:00:54,703 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 21:00:54,703 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:00:54,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:54,704 INFO L85 PathProgramCache]: Analyzing trace with hash 256506248, now seen corresponding path program 1 times [2024-09-12 21:00:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:00:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704623301] [2024-09-12 21:00:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:54,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:00:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:55,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:00:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:00:55,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:00:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704623301] [2024-09-12 21:00:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704623301] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:00:55,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:00:55,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 21:00:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570101410] [2024-09-12 21:00:55,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:00:55,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 21:00:55,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:00:55,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 21:00:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:00:55,109 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:00:55,261 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-09-12 21:00:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 21:00:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-12 21:00:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:00:55,264 INFO L225 Difference]: With dead ends: 56 [2024-09-12 21:00:55,265 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 21:00:55,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:00:55,267 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:00:55,268 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:00:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 21:00:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2024-09-12 21:00:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 21:00:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-09-12 21:00:55,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2024-09-12 21:00:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:00:55,283 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-09-12 21:00:55,283 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:55,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-09-12 21:00:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 21:00:55,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:00:55,285 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:00:55,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 21:00:55,287 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:00:55,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1240316604, now seen corresponding path program 1 times [2024-09-12 21:00:55,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:00:55,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960186565] [2024-09-12 21:00:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:55,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:00:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:57,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:00:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:00:57,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:00:57,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960186565] [2024-09-12 21:00:57,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960186565] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:00:57,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570166239] [2024-09-12 21:00:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:57,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:00:57,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:00:57,204 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) [2024-09-12 21:00:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 21:00:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:57,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 21:00:57,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:00:57,418 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 21 treesize of output 17 [2024-09-12 21:00:57,515 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 [2024-09-12 21:00:57,524 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 [2024-09-12 21:00:57,530 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 [2024-09-12 21:00:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:00:57,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:00:57,874 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-12 21:00:57,875 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 83 treesize of output 63 [2024-09-12 21:00:57,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:00:57,891 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 25 [2024-09-12 21:00:57,899 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 40 [2024-09-12 21:00:57,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:00:57,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:00:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 21:00:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570166239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:00:57,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:00:57,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2024-09-12 21:00:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500371006] [2024-09-12 21:00:57,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:00:57,992 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 21:00:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:00:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 21:00:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-12 21:00:57,993 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:00:58,330 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2024-09-12 21:00:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 21:00:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-12 21:00:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:00:58,332 INFO L225 Difference]: With dead ends: 42 [2024-09-12 21:00:58,332 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 21:00:58,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-09-12 21:00:58,333 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:00:58,334 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 21:00:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 21:00:58,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2024-09-12 21:00:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:00:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2024-09-12 21:00:58,352 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 24 [2024-09-12 21:00:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:00:58,353 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2024-09-12 21:00:58,353 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:00:58,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2024-09-12 21:00:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 21:00:58,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:00:58,356 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:00:58,373 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 21:00:58,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:00:58,561 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:00:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1226106264, now seen corresponding path program 1 times [2024-09-12 21:00:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:00:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350849860] [2024-09-12 21:00:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:00:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:58,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:00:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:58,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 21:00:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 21:00:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:00:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350849860] [2024-09-12 21:00:58,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350849860] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:00:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808860746] [2024-09-12 21:00:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:58,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:00:58,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:00:58,821 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) [2024-09-12 21:00:58,825 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 21:00:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:00:58,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 21:00:58,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:00:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 21:00:59,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:00:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 21:00:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808860746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:00:59,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:00:59,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-12 21:00:59,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000580209] [2024-09-12 21:00:59,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:00:59,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 21:00:59,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:00:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 21:00:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:00:59,255 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:00:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:00:59,479 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-09-12 21:00:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 21:00:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2024-09-12 21:00:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:00:59,481 INFO L225 Difference]: With dead ends: 84 [2024-09-12 21:00:59,481 INFO L226 Difference]: Without dead ends: 49 [2024-09-12 21:00:59,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:00:59,483 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:00:59,484 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 75 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 21:00:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-12 21:00:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2024-09-12 21:00:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:00:59,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-09-12 21:00:59,498 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 31 [2024-09-12 21:00:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:00:59,498 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-09-12 21:00:59,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 21:00:59,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-09-12 21:00:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 21:00:59,501 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:00:59,501 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:00:59,519 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 21:00:59,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:00:59,702 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:00:59,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:00:59,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1365597324, now seen corresponding path program 2 times [2024-09-12 21:00:59,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:00:59,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224673144] [2024-09-12 21:00:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:00:59,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:00:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:01,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:01:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:01,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 21:01:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:01:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:01:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224673144] [2024-09-12 21:01:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224673144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:01:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391498204] [2024-09-12 21:01:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:01:01,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:01:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:01:01,698 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) [2024-09-12 21:01:01,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 21:01:01,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:01:01,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:01:01,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 21:01:01,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:01:01,873 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 19 treesize of output 1 [2024-09-12 21:01:01,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-09-12 21:01:02,426 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 33 treesize of output 21 [2024-09-12 21:01:02,431 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 27 treesize of output 15 [2024-09-12 21:01:02,439 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 9 [2024-09-12 21:01:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 21:01:02,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:01:02,898 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-12 21:01:02,898 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 89 treesize of output 67 [2024-09-12 21:01:02,910 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 40 [2024-09-12 21:01:02,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:02,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:01:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 21:01:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391498204] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:01:03,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:01:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2024-09-12 21:01:03,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993643154] [2024-09-12 21:01:03,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:01:03,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 21:01:03,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:01:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 21:01:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-09-12 21:01:03,036 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:10,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:01:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:01:10,660 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2024-09-12 21:01:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 21:01:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2024-09-12 21:01:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:01:10,662 INFO L225 Difference]: With dead ends: 56 [2024-09-12 21:01:10,663 INFO L226 Difference]: Without dead ends: 54 [2024-09-12 21:01:10,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=173, Invalid=882, Unknown=1, NotChecked=0, Total=1056 [2024-09-12 21:01:10,664 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:01:10,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 174 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-12 21:01:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-12 21:01:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-12 21:01:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2024-09-12 21:01:10,679 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 38 [2024-09-12 21:01:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:01:10,680 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2024-09-12 21:01:10,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:10,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2024-09-12 21:01:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 21:01:10,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:01:10,683 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-09-12 21:01:10,702 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 21:01:10,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:01:10,884 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:01:10,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:10,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1105893832, now seen corresponding path program 3 times [2024-09-12 21:01:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:01:10,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049914914] [2024-09-12 21:01:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:01:10,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:01:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:11,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:01:11,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:11,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 21:01:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:11,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 21:01:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 21:01:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:01:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049914914] [2024-09-12 21:01:11,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049914914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:01:11,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045276417] [2024-09-12 21:01:11,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:01:11,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:01:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:01:11,307 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) [2024-09-12 21:01:11,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 21:01:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 21:01:11,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:01:11,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 21:01:11,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:01:11,803 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 21 treesize of output 17 [2024-09-12 21:01:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2024-09-12 21:01:12,437 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:12,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2024-09-12 21:01:12,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:12,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2024-09-12 21:01:12,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:12,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2024-09-12 21:01:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-12 21:01:12,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:01:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045276417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:01:12,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 21:01:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2024-09-12 21:01:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830323072] [2024-09-12 21:01:12,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 21:01:12,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 21:01:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:01:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 21:01:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-09-12 21:01:12,909 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:01:13,892 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2024-09-12 21:01:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 21:01:13,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-09-12 21:01:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:01:13,895 INFO L225 Difference]: With dead ends: 149 [2024-09-12 21:01:13,895 INFO L226 Difference]: Without dead ends: 91 [2024-09-12 21:01:13,896 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=1250, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 21:01:13,897 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 21:01:13,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 148 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 21:01:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-12 21:01:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 55. [2024-09-12 21:01:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-09-12 21:01:13,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 45 [2024-09-12 21:01:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:01:13,919 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-09-12 21:01:13,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 21:01:13,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-09-12 21:01:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 21:01:13,923 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:01:13,924 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:01:13,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 21:01:14,127 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 [2024-09-12 21:01:14,128 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:01:14,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1482814844, now seen corresponding path program 4 times [2024-09-12 21:01:14,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:01:14,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828233779] [2024-09-12 21:01:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:01:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:01:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:16,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:01:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:16,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 21:01:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:16,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 21:01:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:01:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 21:01:16,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:01:16,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828233779] [2024-09-12 21:01:16,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828233779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:01:16,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191191823] [2024-09-12 21:01:16,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:01:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:01:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:01:16,666 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) [2024-09-12 21:01:16,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 21:01:16,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:01:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:01:16,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 21:01:16,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:01:16,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-09-12 21:01:29,624 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 33 treesize of output 21 [2024-09-12 21:01:29,628 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 27 treesize of output 15 [2024-09-12 21:01:29,630 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 9 [2024-09-12 21:01:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 21:01:29,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:01:42,066 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-12 21:01:42,067 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 89 treesize of output 67 [2024-09-12 21:01:42,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:42,087 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 25 [2024-09-12 21:01:42,093 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 40 [2024-09-12 21:01:42,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:01:42,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:01:42,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 21:01:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191191823] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:01:42,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:01:42,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 12] total 38 [2024-09-12 21:01:42,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048439551] [2024-09-12 21:01:42,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:01:42,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 21:01:42,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:01:42,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 21:01:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1263, Unknown=4, NotChecked=0, Total=1406 [2024-09-12 21:01:42,241 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 38 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:01:46,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:01:59,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:01:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:01:59,664 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2024-09-12 21:01:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 21:01:59,665 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 52 [2024-09-12 21:01:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:01:59,666 INFO L225 Difference]: With dead ends: 70 [2024-09-12 21:01:59,666 INFO L226 Difference]: Without dead ends: 68 [2024-09-12 21:01:59,667 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=246, Invalid=1910, Unknown=6, NotChecked=0, Total=2162 [2024-09-12 21:01:59,668 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:01:59,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 271 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 830 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-09-12 21:01:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-12 21:01:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-09-12 21:01:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 21:01:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2024-09-12 21:01:59,696 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2024-09-12 21:01:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:01:59,697 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2024-09-12 21:01:59,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 36 states have internal predecessors, (95), 8 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:01:59,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2024-09-12 21:01:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 21:01:59,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:01:59,698 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:01:59,718 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 21:01:59,899 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 [2024-09-12 21:01:59,899 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:01:59,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:01:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1121119528, now seen corresponding path program 5 times [2024-09-12 21:01:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:01:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147236423] [2024-09-12 21:01:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:01:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:01:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:02:00,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:02:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:02:00,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-12 21:02:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:02:00,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 21:02:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:02:00,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 21:02:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:02:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 21:02:00,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:02:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147236423] [2024-09-12 21:02:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147236423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:02:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097384594] [2024-09-12 21:02:00,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 21:02:00,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:02:00,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:02:00,224 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) [2024-09-12 21:02:00,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 21:03:08,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 21:03:08,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:03:08,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 21:03:08,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:03:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 21:03:09,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:03:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 21:03:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097384594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:03:09,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:03:09,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-09-12 21:03:09,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679091760] [2024-09-12 21:03:09,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:03:09,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 21:03:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:03:09,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 21:03:09,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-09-12 21:03:09,324 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:03:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:03:09,889 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2024-09-12 21:03:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 21:03:09,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 59 [2024-09-12 21:03:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:03:09,892 INFO L225 Difference]: With dead ends: 142 [2024-09-12 21:03:09,892 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 21:03:09,892 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-09-12 21:03:09,893 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 21:03:09,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 153 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 21:03:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 21:03:09,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2024-09-12 21:03:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 21:03:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2024-09-12 21:03:09,919 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 59 [2024-09-12 21:03:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:03:09,919 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2024-09-12 21:03:09,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:03:09,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2024-09-12 21:03:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-12 21:03:09,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:03:09,921 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:03:09,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 21:03:10,121 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 [2024-09-12 21:03:10,122 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:03:10,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1279452236, now seen corresponding path program 6 times [2024-09-12 21:03:10,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:03:10,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271899116] [2024-09-12 21:03:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:03:10,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:03:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:13,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:03:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:13,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 21:03:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:13,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 21:03:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:13,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 21:03:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 21:03:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:03:13,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271899116] [2024-09-12 21:03:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271899116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:03:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397541174] [2024-09-12 21:03:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 21:03:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:03:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:03:13,850 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) [2024-09-12 21:03:13,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 21:03:15,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 21:03:15,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:03:15,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-12 21:03:15,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:03:15,990 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 19 treesize of output 1 [2024-09-12 21:03:16,297 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 19 treesize of output 1 [2024-09-12 21:03:16,337 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 27 treesize of output 23 [2024-09-12 21:03:17,967 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 33 treesize of output 21 [2024-09-12 21:03:17,971 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 27 treesize of output 15 [2024-09-12 21:03:17,973 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 9 [2024-09-12 21:03:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 21:03:18,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:03:18,776 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 40 [2024-09-12 21:03:18,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:03:18,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:03:18,851 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-12 21:03:18,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 169 treesize of output 150 [2024-09-12 21:03:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 21:03:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397541174] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:03:19,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:03:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 14] total 49 [2024-09-12 21:03:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447794037] [2024-09-12 21:03:19,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:03:19,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 21:03:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:03:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 21:03:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 21:03:19,126 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 21:03:25,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:03:29,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:03:33,311 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] [2024-09-12 21:03:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:03:39,461 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2024-09-12 21:03:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 21:03:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 66 [2024-09-12 21:03:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:03:39,463 INFO L225 Difference]: With dead ends: 125 [2024-09-12 21:03:39,463 INFO L226 Difference]: Without dead ends: 85 [2024-09-12 21:03:39,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=661, Invalid=4740, Unknown=1, NotChecked=0, Total=5402 [2024-09-12 21:03:39,465 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 145 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-09-12 21:03:39,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 260 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1144 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2024-09-12 21:03:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-09-12 21:03:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-09-12 21:03:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 21:03:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2024-09-12 21:03:39,505 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 66 [2024-09-12 21:03:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:03:39,505 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2024-09-12 21:03:39,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 21:03:39,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2024-09-12 21:03:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-12 21:03:39,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:03:39,507 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:03:39,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 21:03:39,707 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 [2024-09-12 21:03:39,708 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:03:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1219063743, now seen corresponding path program 7 times [2024-09-12 21:03:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:03:39,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008223328] [2024-09-12 21:03:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:03:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:03:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:03:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-12 21:03:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-12 21:03:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 21:03:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 21:03:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 21:03:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:03:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008223328] [2024-09-12 21:03:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008223328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:03:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074677295] [2024-09-12 21:03:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 21:03:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:03:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:03:40,177 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) [2024-09-12 21:03:40,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 21:03:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:40,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 21:03:40,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:03:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-12 21:03:40,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:03:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-12 21:03:40,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074677295] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:03:40,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:03:40,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2024-09-12 21:03:40,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585679484] [2024-09-12 21:03:40,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:03:40,995 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 21:03:40,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:03:40,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 21:03:40,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-12 21:03:40,996 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 21:03:41,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:03:41,988 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2024-09-12 21:03:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 21:03:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2024-09-12 21:03:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:03:41,990 INFO L225 Difference]: With dead ends: 168 [2024-09-12 21:03:41,990 INFO L226 Difference]: Without dead ends: 125 [2024-09-12 21:03:41,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 21:03:41,992 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 21:03:41,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 226 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 21:03:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-12 21:03:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 83. [2024-09-12 21:03:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 21:03:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2024-09-12 21:03:42,027 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2024-09-12 21:03:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:03:42,027 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2024-09-12 21:03:42,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 21:03:42,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2024-09-12 21:03:42,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-12 21:03:42,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:03:42,029 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:03:42,043 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 21:03:42,231 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 [2024-09-12 21:03:42,232 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:03:42,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1570893764, now seen corresponding path program 8 times [2024-09-12 21:03:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:03:42,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344478925] [2024-09-12 21:03:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:03:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:03:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:03:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 21:03:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 21:03:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 21:03:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 21:03:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 8 proven. 111 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-12 21:03:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:03:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344478925] [2024-09-12 21:03:45,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344478925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:03:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988086962] [2024-09-12 21:03:45,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:03:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:03:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:03:45,544 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) [2024-09-12 21:03:45,545 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 21:03:45,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:03:45,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:03:45,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 21:03:45,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:03:45,888 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 19 treesize of output 1 [2024-09-12 21:03:45,963 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 19 treesize of output 1 [2024-09-12 21:03:45,990 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 27 treesize of output 23 [2024-09-12 21:03:47,927 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 33 treesize of output 21 [2024-09-12 21:03:47,933 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 27 treesize of output 15 [2024-09-12 21:03:47,936 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 9 [2024-09-12 21:03:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 3 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 21:03:47,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:03:48,933 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 40 [2024-09-12 21:03:48,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:03:48,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:03:49,033 INFO L349 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2024-09-12 21:03:49,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 78 [2024-09-12 21:03:49,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:03:49,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 107 treesize of output 85 [2024-09-12 21:03:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-12 21:03:49,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988086962] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:03:49,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:03:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 16] total 49 [2024-09-12 21:03:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483338967] [2024-09-12 21:03:49,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:03:49,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-12 21:03:49,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:03:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-12 21:03:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 21:03:49,396 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 49 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 21:03:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:03:54,072 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2024-09-12 21:03:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 21:03:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 80 [2024-09-12 21:03:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:03:54,073 INFO L225 Difference]: With dead ends: 97 [2024-09-12 21:03:54,073 INFO L226 Difference]: Without dead ends: 95 [2024-09-12 21:03:54,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=385, Invalid=3275, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 21:03:54,075 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-12 21:03:54,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 275 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-12 21:03:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-12 21:03:54,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2024-09-12 21:03:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:03:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2024-09-12 21:03:54,126 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 80 [2024-09-12 21:03:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:03:54,126 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2024-09-12 21:03:54,127 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.0208333333333335) internal successors, (145), 47 states have internal predecessors, (145), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 21:03:54,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2024-09-12 21:03:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-12 21:03:54,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:03:54,132 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:03:54,150 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 21:03:54,335 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 [2024-09-12 21:03:54,336 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:03:54,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:03:54,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1193369624, now seen corresponding path program 9 times [2024-09-12 21:03:54,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:03:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271210397] [2024-09-12 21:03:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:03:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:03:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:03:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 21:03:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 21:03:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 21:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 21:03:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 21:03:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:03:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-12 21:03:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:03:55,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271210397] [2024-09-12 21:03:55,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271210397] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:03:55,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659777917] [2024-09-12 21:03:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:03:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:03:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:03:55,025 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) [2024-09-12 21:03:55,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 21:03:56,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 21:03:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:03:56,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-12 21:03:56,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:03:57,071 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 52 treesize of output 39 [2024-09-12 21:03:57,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2024-09-12 21:03:57,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-09-12 21:03:57,259 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 52 treesize of output 39 [2024-09-12 21:03:57,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-09-12 21:03:57,412 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 21 treesize of output 17 [2024-09-12 21:03:57,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2024-09-12 21:03:57,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:03:57,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2024-09-12 21:03:57,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:03:57,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 78 [2024-09-12 21:04:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-12 21:04:00,419 INFO L349 Elim1Store]: treesize reduction 124, result has 39.5 percent of original size [2024-09-12 21:04:00,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 179 treesize of output 209 [2024-09-12 21:04:00,569 INFO L349 Elim1Store]: treesize reduction 64, result has 55.9 percent of original size [2024-09-12 21:04:00,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 214 treesize of output 236 [2024-09-12 21:04:00,709 INFO L349 Elim1Store]: treesize reduction 64, result has 55.9 percent of original size [2024-09-12 21:04:00,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 166 treesize of output 188 [2024-09-12 21:04:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-12 21:04:01,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:04:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659777917] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:04:02,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 21:04:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 35 [2024-09-12 21:04:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474598350] [2024-09-12 21:04:02,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 21:04:02,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 21:04:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:04:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 21:04:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1491, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 21:04:02,983 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 10 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 21:04:08,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:04:08,396 INFO L93 Difference]: Finished difference Result 265 states and 279 transitions. [2024-09-12 21:04:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-12 21:04:08,397 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 10 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 87 [2024-09-12 21:04:08,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:04:08,398 INFO L225 Difference]: With dead ends: 265 [2024-09-12 21:04:08,398 INFO L226 Difference]: Without dead ends: 154 [2024-09-12 21:04:08,400 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=729, Invalid=6077, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 21:04:08,409 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 136 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:04:08,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 468 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-12 21:04:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-09-12 21:04:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 97. [2024-09-12 21:04:08,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-12 21:04:08,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2024-09-12 21:04:08,451 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2024-09-12 21:04:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:04:08,452 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2024-09-12 21:04:08,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 10 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-12 21:04:08,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:04:08,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2024-09-12 21:04:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-12 21:04:08,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:04:08,453 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:04:08,468 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 21:04:08,654 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 [2024-09-12 21:04:08,654 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:04:08,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:04:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1265552396, now seen corresponding path program 10 times [2024-09-12 21:04:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:04:08,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152673020] [2024-09-12 21:04:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:04:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:04:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:04:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-12 21:04:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-12 21:04:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-12 21:04:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-12 21:04:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-12 21:04:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:04:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 163 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 21:04:12,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:04:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152673020] [2024-09-12 21:04:12,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152673020] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:04:12,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840005711] [2024-09-12 21:04:12,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:04:12,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:04:12,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:04:12,959 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) [2024-09-12 21:04:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 21:04:13,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:04:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:04:13,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 21:04:13,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:04:13,516 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 27 treesize of output 23 [2024-09-12 21:04:14,697 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 33 treesize of output 21 [2024-09-12 21:04:14,700 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 27 treesize of output 15 [2024-09-12 21:04:14,703 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 9 [2024-09-12 21:04:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 172 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-12 21:04:14,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:04:39,611 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-09-12 21:04:39,611 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 89 treesize of output 67 [2024-09-12 21:04:39,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:04:39,622 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 25 [2024-09-12 21:04:39,626 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 40 [2024-09-12 21:04:39,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-12 21:04:39,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2024-09-12 21:04:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2024-09-12 21:04:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840005711] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:04:40,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:04:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 18] total 65 [2024-09-12 21:04:40,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129496698] [2024-09-12 21:04:40,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:04:40,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-12 21:04:40,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:04:40,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-12 21:04:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3911, Unknown=6, NotChecked=0, Total=4160 [2024-09-12 21:04:40,044 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 65 states, 64 states have (on average 2.46875) internal successors, (158), 63 states have internal predecessors, (158), 17 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 21:04:45,942 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] [2024-09-12 21:04:50,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:04:54,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:04:58,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:05:02,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-12 21:05:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:05:05,159 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2024-09-12 21:05:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-12 21:05:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.46875) internal successors, (158), 63 states have internal predecessors, (158), 17 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 94 [2024-09-12 21:05:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:05:05,161 INFO L225 Difference]: With dead ends: 173 [2024-09-12 21:05:05,161 INFO L226 Difference]: Without dead ends: 171 [2024-09-12 21:05:05,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 164 SyntacticMatches, 9 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=774, Invalid=9726, Unknown=6, NotChecked=0, Total=10506 [2024-09-12 21:05:05,164 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 104 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:05:05,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 384 Invalid, 2589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2480 Invalid, 5 Unknown, 0 Unchecked, 22.2s Time] [2024-09-12 21:05:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-12 21:05:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2024-09-12 21:05:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 129 states have (on average 1.054263565891473) internal successors, (136), 131 states have internal predecessors, (136), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-12 21:05:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 165 transitions. [2024-09-12 21:05:05,237 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 165 transitions. Word has length 94 [2024-09-12 21:05:05,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:05:05,237 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 165 transitions. [2024-09-12 21:05:05,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.46875) internal successors, (158), 63 states have internal predecessors, (158), 17 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-12 21:05:05,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:05:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 165 transitions. [2024-09-12 21:05:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-12 21:05:05,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:05:05,239 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:05:05,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-12 21:05:05,440 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 [2024-09-12 21:05:05,440 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:05:05,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:05:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash -68726527, now seen corresponding path program 11 times [2024-09-12 21:05:05,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:05:05,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706800510] [2024-09-12 21:05:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:05:05,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:05:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:05:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-12 21:05:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-12 21:05:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-12 21:05:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-12 21:05:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-12 21:05:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-12 21:05:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:05:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-12 21:05:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:05:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706800510] [2024-09-12 21:05:06,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706800510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:05:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576972464] [2024-09-12 21:05:06,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 21:05:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:05:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:05:06,144 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) [2024-09-12 21:05:06,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process Killed by 15