./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e378df2c Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5ace794fa35bd3dd49302fe61957917bbb7565f1b1f34293812fc47531868d51 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 15:23:41,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 15:23:41,456 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 15:23:41,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 15:23:41,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 15:23:41,494 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 15:23:41,497 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 15:23:41,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 15:23:41,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 15:23:41,499 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 15:23:41,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 15:23:41,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 15:23:41,500 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 15:23:41,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 15:23:41,503 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 15:23:41,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 15:23:41,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 15:23:41,504 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 15:23:41,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 15:23:41,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 15:23:41,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 15:23:41,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 15:23:41,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 15:23:41,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 15:23:41,508 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 15:23:41,508 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 15:23:41,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 15:23:41,508 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 15:23:41,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 15:23:41,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 15:23:41,509 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 15:23:41,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 15:23:41,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:23:41,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 15:23:41,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 15:23:41,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 15:23:41,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 15:23:41,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 15:23:41,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 15:23:41,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 15:23:41,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 15:23:41,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 15:23:41,514 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ace794fa35bd3dd49302fe61957917bbb7565f1b1f34293812fc47531868d51 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 15:23:41,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 15:23:41,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 15:23:41,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 15:23:41,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 15:23:41,774 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 15:23:41,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c [2024-10-15 15:23:43,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 15:23:43,333 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 15:23:43,333 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c [2024-10-15 15:23:43,340 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/cacf67f04/025cd6f2ec0e4120a25476397057d2d3/FLAG9a4f534ea [2024-10-15 15:23:43,726 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/cacf67f04/025cd6f2ec0e4120a25476397057d2d3 [2024-10-15 15:23:43,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 15:23:43,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 15:23:43,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 15:23:43,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 15:23:43,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 15:23:43,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:23:43" (1/1) ... [2024-10-15 15:23:43,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed6f9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:43, skipping insertion in model container [2024-10-15 15:23:43,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:23:43" (1/1) ... [2024-10-15 15:23:43,767 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 15:23:43,929 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c[1073,1086] [2024-10-15 15:23:43,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:23:43,953 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 15:23:43,965 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_prodbin-ll.c[1073,1086] [2024-10-15 15:23:43,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 15:23:44,010 INFO L204 MainTranslator]: Completed translation [2024-10-15 15:23:44,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44 WrapperNode [2024-10-15 15:23:44,011 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 15:23:44,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 15:23:44,015 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 15:23:44,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 15:23:44,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,032 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 15:23:44,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 15:23:44,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 15:23:44,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 15:23:44,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 15:23:44,041 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,058 INFO L175 MemorySlicer]: Split 29 memory accesses to 6 slices as follows [5, 2, 5, 8, 5, 4]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0]. The 9 writes are split as follows [2, 0, 2, 3, 1, 1]. [2024-10-15 15:23:44,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,069 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,076 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 15:23:44,079 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 15:23:44,079 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 15:23:44,079 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 15:23:44,080 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (1/1) ... [2024-10-15 15:23:44,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 15:23:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:44,121 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) [2024-10-15 15:23:44,128 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 [2024-10-15 15:23:44,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 15:23:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-15 15:23:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-15 15:23:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 15:23:44,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 15:23:44,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 15:23:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 15:23:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-15 15:23:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-15 15:23:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-15 15:23:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-15 15:23:44,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-15 15:23:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-15 15:23:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 15:23:44,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 15:23:44,176 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_40_0 [2024-10-15 15:23:44,176 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_40_0 [2024-10-15 15:23:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 15:23:44,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 15:23:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 15:23:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 15:23:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-15 15:23:44,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-15 15:23:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-15 15:23:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-15 15:23:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 15:23:44,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 15:23:44,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 15:23:44,260 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 15:23:44,261 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 15:23:44,439 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-15 15:23:44,439 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 15:23:44,459 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 15:23:44,459 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-15 15:23:44,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:44 BoogieIcfgContainer [2024-10-15 15:23:44,460 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 15:23:44,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 15:23:44,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 15:23:44,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 15:23:44,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:23:43" (1/3) ... [2024-10-15 15:23:44,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b4e4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:23:44, skipping insertion in model container [2024-10-15 15:23:44,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:23:44" (2/3) ... [2024-10-15 15:23:44,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60b4e4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:23:44, skipping insertion in model container [2024-10-15 15:23:44,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:23:44" (3/3) ... [2024-10-15 15:23:44,473 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prodbin-ll.c [2024-10-15 15:23:44,489 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 15:23:44,490 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 15:23:44,552 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 15:23:44,562 INFO L333 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;@4a3d510a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 15:23:44,562 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 15:23:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:23:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:23:44,573 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:44,574 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:44,575 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:44,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:44,581 INFO L85 PathProgramCache]: Analyzing trace with hash 574913788, now seen corresponding path program 1 times [2024-10-15 15:23:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:44,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442201891] [2024-10-15 15:23:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:44,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:44,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:44,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:44,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442201891] [2024-10-15 15:23:44,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442201891] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:44,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:44,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 15:23:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851939855] [2024-10-15 15:23:44,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:44,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 15:23:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 15:23:44,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:23:44,859 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:23:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:44,886 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-10-15 15:23:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 15:23:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-15 15:23:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:44,893 INFO L225 Difference]: With dead ends: 60 [2024-10-15 15:23:44,894 INFO L226 Difference]: Without dead ends: 30 [2024-10-15 15:23:44,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 15:23:44,899 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:44,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 15:23:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-15 15:23:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-15 15:23:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:23:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-10-15 15:23:44,933 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2024-10-15 15:23:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:44,934 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-10-15 15:23:44,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:23:44,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-10-15 15:23:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-15 15:23:44,936 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:44,937 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:44,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 15:23:44,937 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:44,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1275978366, now seen corresponding path program 1 times [2024-10-15 15:23:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:44,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797203048] [2024-10-15 15:23:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:45,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065767635] [2024-10-15 15:23:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:45,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:45,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:45,014 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) [2024-10-15 15:23:45,015 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 15:23:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:45,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-15 15:23:45,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:45,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:45,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:45,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:45,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:45,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:45,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:23:45,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:23:45,439 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 19 treesize of output 11 [2024-10-15 15:23:45,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:23:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:45,506 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-15 15:23:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797203048] [2024-10-15 15:23:45,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065767635] [2024-10-15 15:23:45,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065767635] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:45,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:45,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-15 15:23:45,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374934181] [2024-10-15 15:23:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:45,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-15 15:23:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-15 15:23:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-15 15:23:45,515 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:23:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:45,726 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-10-15 15:23:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-15 15:23:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-10-15 15:23:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:45,728 INFO L225 Difference]: With dead ends: 46 [2024-10-15 15:23:45,728 INFO L226 Difference]: Without dead ends: 44 [2024-10-15 15:23:45,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:23:45,730 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:45,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 139 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 15:23:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-15 15:23:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2024-10-15 15:23:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:23:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-15 15:23:45,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 18 [2024-10-15 15:23:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:45,751 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-15 15:23:45,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-15 15:23:45,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-15 15:23:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-15 15:23:45,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:45,753 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:45,770 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 15:23:45,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:45,958 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:45,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash 936628089, now seen corresponding path program 1 times [2024-10-15 15:23:45,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:45,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882642371] [2024-10-15 15:23:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:45,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:23:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,498 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:23:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:23:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,647 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:23:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:46,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:46,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882642371] [2024-10-15 15:23:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882642371] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 15:23:46,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 15:23:46,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-15 15:23:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408921332] [2024-10-15 15:23:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 15:23:46,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-15 15:23:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-15 15:23:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-10-15 15:23:46,661 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 15:23:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:23:46,962 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-10-15 15:23:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-15 15:23:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2024-10-15 15:23:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:23:46,964 INFO L225 Difference]: With dead ends: 52 [2024-10-15 15:23:46,964 INFO L226 Difference]: Without dead ends: 42 [2024-10-15 15:23:46,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-15 15:23:46,966 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 15:23:46,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 69 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 15:23:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-15 15:23:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-15 15:23:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:23:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-10-15 15:23:46,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 28 [2024-10-15 15:23:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:23:46,986 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-10-15 15:23:46,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-15 15:23:46,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-10-15 15:23:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:23:46,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:23:46,989 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:23:46,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-15 15:23:46,989 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:23:46,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:23:46,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1861020597, now seen corresponding path program 1 times [2024-10-15 15:23:46,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:23:46,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124208280] [2024-10-15 15:23:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:23:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:23:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111306983] [2024-10-15 15:23:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:23:47,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:23:47,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:23:47,063 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) [2024-10-15 15:23:47,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 15:23:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:23:47,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-10-15 15:23:47,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:23:47,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:47,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:23:47,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:23:47,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:47,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:23:47,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:23:47,603 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 53 treesize of output 29 [2024-10-15 15:23:47,714 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 97 treesize of output 71 [2024-10-15 15:23:47,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 69 [2024-10-15 15:23:47,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 13 [2024-10-15 15:23:47,779 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 40 treesize of output 24 [2024-10-15 15:23:47,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-15 15:23:47,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:23:47,951 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 [2024-10-15 15:23:47,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-10-15 15:23:47,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:23:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:49,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:23:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:23:54,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:23:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124208280] [2024-10-15 15:23:54,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:23:54,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111306983] [2024-10-15 15:23:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111306983] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:23:54,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:23:54,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2024-10-15 15:23:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050658754] [2024-10-15 15:23:54,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:23:54,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-15 15:23:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:23:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-15 15:23:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-10-15 15:23:54,303 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:24:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:02,866 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2024-10-15 15:24:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:24:02,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-10-15 15:24:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:02,869 INFO L225 Difference]: With dead ends: 75 [2024-10-15 15:24:02,869 INFO L226 Difference]: Without dead ends: 73 [2024-10-15 15:24:02,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2024-10-15 15:24:02,871 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:02,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 261 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-10-15 15:24:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-15 15:24:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-10-15 15:24:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 12 states have call successors, (12), 10 states have call predecessors, (12), 11 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2024-10-15 15:24:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2024-10-15 15:24:02,909 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 30 [2024-10-15 15:24:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:02,909 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2024-10-15 15:24:02,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 9 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-15 15:24:02,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:02,910 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2024-10-15 15:24:02,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-15 15:24:02,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:02,912 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:24:02,929 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 15:24:03,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:03,113 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:03,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:03,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1180962227, now seen corresponding path program 1 times [2024-10-15 15:24:03,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:03,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530643052] [2024-10-15 15:24:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:03,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172030375] [2024-10-15 15:24:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:03,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:03,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:03,155 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) [2024-10-15 15:24:03,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 15:24:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:03,259 WARN L253 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-10-15 15:24:03,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:03,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:03,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:03,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:03,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:03,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:03,655 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 29 treesize of output 17 [2024-10-15 15:24:03,668 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 105 treesize of output 77 [2024-10-15 15:24:03,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2024-10-15 15:24:03,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 11 [2024-10-15 15:24:03,814 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 [2024-10-15 15:24:03,817 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 [2024-10-15 15:24:03,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-15 15:24:03,827 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 34 treesize of output 18 [2024-10-15 15:24:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:24:03,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:24:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530643052] [2024-10-15 15:24:05,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172030375] [2024-10-15 15:24:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172030375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:24:05,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:24:05,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2024-10-15 15:24:05,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082779260] [2024-10-15 15:24:05,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:05,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-15 15:24:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-15 15:24:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-10-15 15:24:05,996 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 11 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:24:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:24:11,805 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2024-10-15 15:24:11,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-15 15:24:11,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 11 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2024-10-15 15:24:11,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:24:11,807 INFO L225 Difference]: With dead ends: 120 [2024-10-15 15:24:11,807 INFO L226 Difference]: Without dead ends: 118 [2024-10-15 15:24:11,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2024-10-15 15:24:11,809 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:24:11,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 336 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-15 15:24:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-15 15:24:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2024-10-15 15:24:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 79 states have internal predecessors, (85), 18 states have call successors, (18), 15 states have call predecessors, (18), 18 states have return successors, (27), 15 states have call predecessors, (27), 16 states have call successors, (27) [2024-10-15 15:24:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2024-10-15 15:24:11,847 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 30 [2024-10-15 15:24:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:24:11,848 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2024-10-15 15:24:11,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 11 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-15 15:24:11,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2024-10-15 15:24:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:24:11,850 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:24:11,850 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:24:11,864 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 15:24:12,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:12,055 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:24:12,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:24:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1303652198, now seen corresponding path program 1 times [2024-10-15 15:24:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:24:12,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537093968] [2024-10-15 15:24:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:24:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:24:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466465281] [2024-10-15 15:24:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:24:12,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:24:12,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:24:12,107 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) [2024-10-15 15:24:12,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 15:24:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:24:12,308 WARN L253 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-10-15 15:24:12,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:24:12,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:12,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:24:12,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:12,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:24:12,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:24:12,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2024-10-15 15:24:12,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:24:12,651 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 108 treesize of output 80 [2024-10-15 15:24:12,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2024-10-15 15:24:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 13 [2024-10-15 15:24:12,671 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 40 treesize of output 24 [2024-10-15 15:24:13,260 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 31 treesize of output 19 [2024-10-15 15:24:13,270 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 117 treesize of output 87 [2024-10-15 15:24:13,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2024-10-15 15:24:13,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 28 treesize of output 13 [2024-10-15 15:24:13,490 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 65 treesize of output 41 [2024-10-15 15:24:13,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:24:13,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2024-10-15 15:24:13,515 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 28 treesize of output 16 [2024-10-15 15:24:13,523 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 [2024-10-15 15:24:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:24:14,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:24:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:24:28,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:24:28,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537093968] [2024-10-15 15:24:28,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:24:28,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466465281] [2024-10-15 15:24:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466465281] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:24:28,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:24:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 38 [2024-10-15 15:24:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560569787] [2024-10-15 15:24:28,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:24:28,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-15 15:24:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:24:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-15 15:24:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2024-10-15 15:24:28,856 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:24:31,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:25:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:23,116 INFO L93 Difference]: Finished difference Result 212 states and 260 transitions. [2024-10-15 15:25:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-15 15:25:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2024-10-15 15:25:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:23,120 INFO L225 Difference]: With dead ends: 212 [2024-10-15 15:25:23,121 INFO L226 Difference]: Without dead ends: 208 [2024-10-15 15:25:23,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=743, Invalid=4957, Unknown=0, NotChecked=0, Total=5700 [2024-10-15 15:25:23,123 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 130 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:23,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 354 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2024-10-15 15:25:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-10-15 15:25:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 199. [2024-10-15 15:25:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 145 states have internal predecessors, (159), 31 states have call successors, (31), 25 states have call predecessors, (31), 33 states have return successors, (58), 28 states have call predecessors, (58), 28 states have call successors, (58) [2024-10-15 15:25:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 248 transitions. [2024-10-15 15:25:23,216 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 248 transitions. Word has length 42 [2024-10-15 15:25:23,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:23,216 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 248 transitions. [2024-10-15 15:25:23,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 30 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:25:23,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 248 transitions. [2024-10-15 15:25:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:25:23,218 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:23,218 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:25:23,239 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 15:25:23,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:23,418 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:23,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1561008742, now seen corresponding path program 2 times [2024-10-15 15:25:23,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:23,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312229072] [2024-10-15 15:25:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:23,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014862249] [2024-10-15 15:25:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:25:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:23,471 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) [2024-10-15 15:25:23,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 15:25:23,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:25:23,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:25:23,637 WARN L253 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 208 conjuncts are in the unsatisfiable core [2024-10-15 15:25:23,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:23,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:23,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:23,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:23,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:23,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:24,154 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 29 treesize of output 17 [2024-10-15 15:25:24,161 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 105 treesize of output 77 [2024-10-15 15:25:24,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2024-10-15 15:25:24,617 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 47 treesize of output 27 [2024-10-15 15:25:24,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:25:24,721 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 42 treesize of output 26 [2024-10-15 15:25:24,735 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 110 treesize of output 82 [2024-10-15 15:25:24,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2024-10-15 15:25:24,969 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 34 treesize of output 22 [2024-10-15 15:25:24,972 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 [2024-10-15 15:25:24,977 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 [2024-10-15 15:25:24,983 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 53 treesize of output 33 [2024-10-15 15:25:24,990 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 [2024-10-15 15:25:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 15:25:25,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:25:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312229072] [2024-10-15 15:25:35,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014862249] [2024-10-15 15:25:35,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014862249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:25:35,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-15 15:25:35,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 36 [2024-10-15 15:25:35,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709354787] [2024-10-15 15:25:35,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:35,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-15 15:25:35,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:35,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-15 15:25:35,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-10-15 15:25:35,695 INFO L87 Difference]: Start difference. First operand 199 states and 248 transitions. Second operand has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:25:42,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-15 15:25:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:52,203 INFO L93 Difference]: Finished difference Result 281 states and 353 transitions. [2024-10-15 15:25:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-15 15:25:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2024-10-15 15:25:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:52,210 INFO L225 Difference]: With dead ends: 281 [2024-10-15 15:25:52,211 INFO L226 Difference]: Without dead ends: 269 [2024-10-15 15:25:52,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2024-10-15 15:25:52,214 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 102 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:52,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 323 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-10-15 15:25:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-10-15 15:25:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 260. [2024-10-15 15:25:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 176 states have (on average 1.1875) internal successors, (209), 191 states have internal predecessors, (209), 41 states have call successors, (41), 32 states have call predecessors, (41), 42 states have return successors, (80), 36 states have call predecessors, (80), 38 states have call successors, (80) [2024-10-15 15:25:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 330 transitions. [2024-10-15 15:25:52,372 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 330 transitions. Word has length 42 [2024-10-15 15:25:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:52,373 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 330 transitions. [2024-10-15 15:25:52,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 28 states have internal predecessors, (51), 12 states have call successors, (16), 10 states have call predecessors, (16), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-15 15:25:52,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 330 transitions. [2024-10-15 15:25:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-15 15:25:52,375 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:52,375 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:25:52,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 15:25:52,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-15 15:25:52,576 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:52,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 549162052, now seen corresponding path program 1 times [2024-10-15 15:25:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:52,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637775128] [2024-10-15 15:25:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:52,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253083607] [2024-10-15 15:25:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:52,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:52,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:52,604 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) [2024-10-15 15:25:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 15:25:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:25:52,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-15 15:25:52,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:52,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:52,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:52,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:52,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:52,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:53,244 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 47 treesize of output 31 [2024-10-15 15:25:53,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 24 [2024-10-15 15:25:53,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-10-15 15:25:53,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:25:53,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-10-15 15:25:53,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-15 15:25:53,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-15 15:25:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-15 15:25:53,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637775128] [2024-10-15 15:25:54,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253083607] [2024-10-15 15:25:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253083607] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:54,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:25:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505345961] [2024-10-15 15:25:54,144 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:54,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:25:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:25:54,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-10-15 15:25:54,146 INFO L87 Difference]: Start difference. First operand 260 states and 330 transitions. Second operand has 19 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:25:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:54,703 INFO L93 Difference]: Finished difference Result 270 states and 343 transitions. [2024-10-15 15:25:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-15 15:25:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-10-15 15:25:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:54,706 INFO L225 Difference]: With dead ends: 270 [2024-10-15 15:25:54,706 INFO L226 Difference]: Without dead ends: 260 [2024-10-15 15:25:54,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-10-15 15:25:54,707 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:54,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 70 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 15:25:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-10-15 15:25:54,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 256. [2024-10-15 15:25:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 173 states have (on average 1.1849710982658959) internal successors, (205), 189 states have internal predecessors, (205), 41 states have call successors, (41), 31 states have call predecessors, (41), 41 states have return successors, (83), 35 states have call predecessors, (83), 39 states have call successors, (83) [2024-10-15 15:25:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 329 transitions. [2024-10-15 15:25:54,824 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 329 transitions. Word has length 42 [2024-10-15 15:25:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:54,824 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 329 transitions. [2024-10-15 15:25:54,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-15 15:25:54,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 329 transitions. [2024-10-15 15:25:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 15:25:54,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:54,827 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:25:54,842 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-15 15:25:55,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:55,027 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:55,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 953923471, now seen corresponding path program 2 times [2024-10-15 15:25:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:55,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020365999] [2024-10-15 15:25:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:25:55,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733029835] [2024-10-15 15:25:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:25:55,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:25:55,069 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) [2024-10-15 15:25:55,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-15 15:25:55,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:25:55,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:25:55,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-10-15 15:25:55,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:25:55,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:55,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:25:55,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:55,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:25:55,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:55,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:55,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:25:56,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-10-15 15:25:56,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:25:56,347 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 64 treesize of output 46 [2024-10-15 15:25:56,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 46 treesize of output 37 [2024-10-15 15:25:56,393 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 [2024-10-15 15:25:56,395 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 [2024-10-15 15:25:56,398 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 45 treesize of output 29 [2024-10-15 15:25:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-15 15:25:56,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:25:58,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:25:58,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020365999] [2024-10-15 15:25:58,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:25:58,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733029835] [2024-10-15 15:25:58,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733029835] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:25:58,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:25:58,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-10-15 15:25:58,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352091729] [2024-10-15 15:25:58,601 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:25:58,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-15 15:25:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:25:58,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-15 15:25:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2024-10-15 15:25:58,603 INFO L87 Difference]: Start difference. First operand 256 states and 329 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-15 15:25:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:25:59,413 INFO L93 Difference]: Finished difference Result 270 states and 360 transitions. [2024-10-15 15:25:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-15 15:25:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2024-10-15 15:25:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:25:59,416 INFO L225 Difference]: With dead ends: 270 [2024-10-15 15:25:59,416 INFO L226 Difference]: Without dead ends: 258 [2024-10-15 15:25:59,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=148, Invalid=1334, Unknown=0, NotChecked=0, Total=1482 [2024-10-15 15:25:59,417 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 15:25:59,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 15:25:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-15 15:25:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2024-10-15 15:25:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 173 states have (on average 1.1791907514450868) internal successors, (204), 188 states have internal predecessors, (204), 41 states have call successors, (41), 31 states have call predecessors, (41), 41 states have return successors, (100), 36 states have call predecessors, (100), 39 states have call successors, (100) [2024-10-15 15:25:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 345 transitions. [2024-10-15 15:25:59,569 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 345 transitions. Word has length 56 [2024-10-15 15:25:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:25:59,569 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 345 transitions. [2024-10-15 15:25:59,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-15 15:25:59,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 345 transitions. [2024-10-15 15:25:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 15:25:59,571 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:25:59,571 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2024-10-15 15:25:59,589 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-15 15:25:59,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:25:59,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:25:59,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:25:59,776 INFO L85 PathProgramCache]: Analyzing trace with hash -851514863, now seen corresponding path program 1 times [2024-10-15 15:25:59,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:25:59,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968080509] [2024-10-15 15:25:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:25:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:25:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:00,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:26:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:00,519 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:26:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:00,528 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,075 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,078 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,384 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,390 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-15 15:26:01,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:01,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968080509] [2024-10-15 15:26:01,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968080509] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:01,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640593051] [2024-10-15 15:26:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:01,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:01,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:01,475 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) [2024-10-15 15:26:01,476 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-15 15:26:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:01,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-15 15:26:01,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:01,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-15 15:26:01,678 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 99 treesize of output 71 [2024-10-15 15:26:01,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 67 [2024-10-15 15:26:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:26:02,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:26:03,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640593051] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:26:03,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:26:03,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 16] total 35 [2024-10-15 15:26:03,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344322926] [2024-10-15 15:26:03,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:03,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-15 15:26:03,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-15 15:26:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2024-10-15 15:26:03,117 INFO L87 Difference]: Start difference. First operand 256 states and 345 transitions. Second operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 10 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-15 15:26:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:03,953 INFO L93 Difference]: Finished difference Result 272 states and 401 transitions. [2024-10-15 15:26:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 15:26:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 10 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 56 [2024-10-15 15:26:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:03,957 INFO L225 Difference]: With dead ends: 272 [2024-10-15 15:26:03,957 INFO L226 Difference]: Without dead ends: 242 [2024-10-15 15:26:03,959 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1586, Unknown=0, NotChecked=0, Total=1892 [2024-10-15 15:26:03,959 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:03,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 124 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-15 15:26:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-10-15 15:26:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2024-10-15 15:26:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 166 states have (on average 1.1566265060240963) internal successors, (192), 176 states have internal predecessors, (192), 41 states have call successors, (41), 31 states have call predecessors, (41), 34 states have return successors, (93), 34 states have call predecessors, (93), 39 states have call successors, (93) [2024-10-15 15:26:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 326 transitions. [2024-10-15 15:26:04,085 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 326 transitions. Word has length 56 [2024-10-15 15:26:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:04,086 INFO L471 AbstractCegarLoop]: Abstraction has 242 states and 326 transitions. [2024-10-15 15:26:04,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 10 states have call successors, (16), 6 states have call predecessors, (16), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2024-10-15 15:26:04,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 326 transitions. [2024-10-15 15:26:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 15:26:04,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:04,088 INFO L215 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1] [2024-10-15 15:26:04,106 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-15 15:26:04,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:04,292 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:04,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash 109917969, now seen corresponding path program 2 times [2024-10-15 15:26:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827410255] [2024-10-15 15:26:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622866474] [2024-10-15 15:26:04,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 15:26:04,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:04,338 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) [2024-10-15 15:26:04,339 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-15 15:26:04,504 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 15:26:04,504 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:26:04,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-10-15 15:26:04,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:04,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:26:04,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:26:04,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-15 15:26:04,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:04,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:04,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:05,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-10-15 15:26:05,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-15 15:26:05,705 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 60 treesize of output 42 [2024-10-15 15:26:05,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 33 [2024-10-15 15:26:05,784 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 [2024-10-15 15:26:05,786 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 [2024-10-15 15:26:05,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-15 15:26:05,801 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 48 treesize of output 40 [2024-10-15 15:26:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-15 15:26:05,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:07,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:07,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827410255] [2024-10-15 15:26:07,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:26:07,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622866474] [2024-10-15 15:26:07,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622866474] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:07,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:26:07,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-10-15 15:26:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926908804] [2024-10-15 15:26:07,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:07,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-15 15:26:07,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-15 15:26:07,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:26:07,762 INFO L87 Difference]: Start difference. First operand 242 states and 326 transitions. Second operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:26:11,791 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] [2024-10-15 15:26:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:13,061 INFO L93 Difference]: Finished difference Result 252 states and 353 transitions. [2024-10-15 15:26:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 15:26:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2024-10-15 15:26:13,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:13,064 INFO L225 Difference]: With dead ends: 252 [2024-10-15 15:26:13,064 INFO L226 Difference]: Without dead ends: 240 [2024-10-15 15:26:13,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 15:26:13,065 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:13,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 149 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 654 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-10-15 15:26:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-10-15 15:26:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2024-10-15 15:26:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 164 states have (on average 1.1524390243902438) internal successors, (189), 173 states have internal predecessors, (189), 41 states have call successors, (41), 31 states have call predecessors, (41), 32 states have return successors, (91), 33 states have call predecessors, (91), 39 states have call successors, (91) [2024-10-15 15:26:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 321 transitions. [2024-10-15 15:26:13,187 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 321 transitions. Word has length 56 [2024-10-15 15:26:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:13,187 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 321 transitions. [2024-10-15 15:26:13,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-15 15:26:13,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 321 transitions. [2024-10-15 15:26:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-15 15:26:13,188 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:13,188 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:26:13,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-15 15:26:13,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-15 15:26:13,393 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:13,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1695520365, now seen corresponding path program 1 times [2024-10-15 15:26:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:13,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231031675] [2024-10-15 15:26:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 15:26:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-10-15 15:26:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,128 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-15 15:26:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-15 15:26:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-15 15:26:14,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231031675] [2024-10-15 15:26:14,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231031675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:14,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766071320] [2024-10-15 15:26:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:14,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:14,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:14,835 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) [2024-10-15 15:26:14,836 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-15 15:26:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 15:26:14,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-15 15:26:15,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:15,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-15 15:26:15,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:26:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-15 15:26:15,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-15 15:26:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766071320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 15:26:18,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 15:26:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 24] total 48 [2024-10-15 15:26:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420058279] [2024-10-15 15:26:18,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:18,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-15 15:26:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-15 15:26:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2024-10-15 15:26:18,134 INFO L87 Difference]: Start difference. First operand 238 states and 321 transitions. Second operand has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 16 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2024-10-15 15:26:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:19,718 INFO L93 Difference]: Finished difference Result 250 states and 340 transitions. [2024-10-15 15:26:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-15 15:26:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 16 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) Word has length 56 [2024-10-15 15:26:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:19,720 INFO L225 Difference]: With dead ends: 250 [2024-10-15 15:26:19,721 INFO L226 Difference]: Without dead ends: 226 [2024-10-15 15:26:19,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=517, Invalid=3389, Unknown=0, NotChecked=0, Total=3906 [2024-10-15 15:26:19,722 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:19,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-15 15:26:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-10-15 15:26:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2024-10-15 15:26:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 156 states have (on average 1.1474358974358974) internal successors, (179), 164 states have internal predecessors, (179), 41 states have call successors, (41), 31 states have call predecessors, (41), 26 states have return successors, (79), 28 states have call predecessors, (79), 39 states have call successors, (79) [2024-10-15 15:26:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 299 transitions. [2024-10-15 15:26:19,835 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 299 transitions. Word has length 56 [2024-10-15 15:26:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:19,835 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 299 transitions. [2024-10-15 15:26:19,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 41 states have internal predecessors, (59), 16 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (16), 13 states have call predecessors, (16), 15 states have call successors, (16) [2024-10-15 15:26:19,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 299 transitions. [2024-10-15 15:26:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-15 15:26:19,837 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:19,837 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:26:19,854 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-15 15:26:20,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-15 15:26:20,037 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:20,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1850912182, now seen corresponding path program 3 times [2024-10-15 15:26:20,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:20,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377979973] [2024-10-15 15:26:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830920440] [2024-10-15 15:26:20,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 15:26:20,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:20,098 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) [2024-10-15 15:26:20,099 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-15 15:26:20,709 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-15 15:26:20,709 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:26:20,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 158 conjuncts are in the unsatisfiable core [2024-10-15 15:26:20,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:20,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-15 15:26:20,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-15 15:26:20,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-15 15:26:20,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-15 15:26:21,087 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-10-15 15:26:21,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 78 [2024-10-15 15:26:21,120 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 65 treesize of output 45 [2024-10-15 15:26:22,546 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 90 treesize of output 74 [2024-10-15 15:26:22,557 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 63 treesize of output 55 [2024-10-15 15:26:22,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-15 15:26:22,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2024-10-15 15:26:22,581 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 43 treesize of output 35 [2024-10-15 15:26:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 71 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-15 15:26:24,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 15:26:26,233 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 126 treesize of output 110 [2024-10-15 15:26:26,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 98 [2024-10-15 15:26:26,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 15:26:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377979973] [2024-10-15 15:26:26,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-15 15:26:26,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830920440] [2024-10-15 15:26:26,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830920440] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 15:26:26,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-15 15:26:26,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-15 15:26:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918682153] [2024-10-15 15:26:26,742 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-15 15:26:26,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-15 15:26:26,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 15:26:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-15 15:26:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-10-15 15:26:26,743 INFO L87 Difference]: Start difference. First operand 224 states and 299 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:26:30,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:26:33,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-15 15:26:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 15:26:44,819 INFO L93 Difference]: Finished difference Result 265 states and 358 transitions. [2024-10-15 15:26:44,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-15 15:26:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-10-15 15:26:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 15:26:44,821 INFO L225 Difference]: With dead ends: 265 [2024-10-15 15:26:44,822 INFO L226 Difference]: Without dead ends: 259 [2024-10-15 15:26:44,822 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=402, Invalid=1950, Unknown=0, NotChecked=0, Total=2352 [2024-10-15 15:26:44,823 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2024-10-15 15:26:44,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 280 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2024-10-15 15:26:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-10-15 15:26:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2024-10-15 15:26:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 181 states have internal predecessors, (201), 44 states have call successors, (44), 35 states have call predecessors, (44), 28 states have return successors, (84), 31 states have call predecessors, (84), 42 states have call successors, (84) [2024-10-15 15:26:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 329 transitions. [2024-10-15 15:26:44,971 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 329 transitions. Word has length 66 [2024-10-15 15:26:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 15:26:44,971 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 329 transitions. [2024-10-15 15:26:44,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 15 states have internal predecessors, (40), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-15 15:26:44,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 329 transitions. [2024-10-15 15:26:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-15 15:26:44,972 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 15:26:44,973 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 15:26:44,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-15 15:26:45,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:45,173 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 15:26:45,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 15:26:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1098467254, now seen corresponding path program 4 times [2024-10-15 15:26:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 15:26:45,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22266401] [2024-10-15 15:26:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 15:26:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 15:26:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-15 15:26:45,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732330730] [2024-10-15 15:26:45,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 15:26:45,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 15:26:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 15:26:45,216 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) [2024-10-15 15:26:45,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-15 15:26:46,203 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 15:26:46,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 15:26:46,207 WARN L253 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 315 conjuncts are in the unsatisfiable core [2024-10-15 15:26:46,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 15:26:46,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-15 15:26:46,473 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 65 treesize of output 41 [2024-10-15 15:26:46,508 INFO L349 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2024-10-15 15:26:46,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2024-10-15 15:26:46,566 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 115 treesize of output 89 [2024-10-15 15:26:46,583 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 56 treesize of output 36 [2024-10-15 15:26:46,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 87 [2024-10-15 15:26:55,929 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 74 treesize of output 50 [2024-10-15 15:26:55,971 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 31 treesize of output 19 [2024-10-15 15:27:22,707 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 172 treesize of output 140 [2024-10-15 15:27:22,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 132 [2024-10-15 15:27:22,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 7 [2024-10-15 15:27:22,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2024-10-15 15:27:54,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 66 [2024-10-15 15:27:54,915 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 184 treesize of output 152 [2024-10-15 15:27:59,879 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 159 treesize of output 123 [2024-10-15 15:27:59,920 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 224 treesize of output 196 [2024-10-15 15:27:59,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 192