./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.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 6908dde5 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_mannadiv.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 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:18:49,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:18:49,655 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:18:49,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:18:49,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:18:49,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:18:49,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:18:49,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:18:49,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:18:49,698 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:18:49,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:18:49,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:18:49,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:18:49,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:18:49,703 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:18:49,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:18:49,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:18:49,704 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:18:49,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:18:49,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:18:49,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:18:49,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:18:49,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:18:49,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:18:49,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:18:49,706 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:18:49,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:18:49,706 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:18:49,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:18:49,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:18:49,707 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:18:49,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:18:49,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:49,707 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:18:49,708 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:18:49,709 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:18:49,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:18:49,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:18:49,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:18:49,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:18:49,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:18:49,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:18:49,994 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:18:49,995 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-25 00:18:51,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:18:51,618 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:18:51,618 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-25 00:18:51,627 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/69359a41a/56eba6ef33e642e3a4cdeaba014bc3dc/FLAG2de832dad [2024-09-25 00:18:52,010 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/69359a41a/56eba6ef33e642e3a4cdeaba014bc3dc [2024-09-25 00:18:52,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:18:52,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:18:52,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:52,015 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:18:52,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:18:52,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30eef465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52, skipping insertion in model container [2024-09-25 00:18:52,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,043 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:18:52,217 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_mannadiv.c[1105,1118] [2024-09-25 00:18:52,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:52,266 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:18:52,277 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_mannadiv.c[1105,1118] [2024-09-25 00:18:52,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:18:52,314 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:18:52,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52 WrapperNode [2024-09-25 00:18:52,315 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:18:52,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:52,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:18:52,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:18:52,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,331 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,339 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:18:52,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:18:52,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:18:52,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:18:52,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:18:52,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,381 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 5, 5, 7]. 23 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 1, 1, 3]. [2024-09-25 00:18:52,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:18:52,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:18:52,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:18:52,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:18:52,407 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (1/1) ... [2024-09-25 00:18:52,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:18:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:52,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:18:52,456 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:18:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:18:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 00:18:52,504 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 00:18:52,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:18:52,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:18:52,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:18:52,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-09-25 00:18:52,506 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:18:52,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:18:52,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:18:52,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:18:52,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:18:52,629 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:18:52,631 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:18:52,838 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 00:18:52,839 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:18:52,865 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:18:52,865 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 00:18:52,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:52 BoogieIcfgContainer [2024-09-25 00:18:52,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:18:52,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:18:52,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:18:52,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:18:52,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:18:52" (1/3) ... [2024-09-25 00:18:52,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf1a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:52, skipping insertion in model container [2024-09-25 00:18:52,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:18:52" (2/3) ... [2024-09-25 00:18:52,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf1a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:18:52, skipping insertion in model container [2024-09-25 00:18:52,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:18:52" (3/3) ... [2024-09-25 00:18:52,875 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-09-25 00:18:52,889 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:18:52,890 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:18:52,943 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:18:52,949 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@769f18f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:18:52,949 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:18:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 00:18:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:18:52,960 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:52,960 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:52,961 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:52,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:52,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1619877398, now seen corresponding path program 1 times [2024-09-25 00:18:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:52,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579992575] [2024-09-25 00:18:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:52,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:53,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:18:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:53,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:18:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:53,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:18:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579992575] [2024-09-25 00:18:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579992575] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:53,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 00:18:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906363141] [2024-09-25 00:18:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:53,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 00:18:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 00:18:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 00:18:53,316 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:18:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:53,348 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-25 00:18:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 00:18:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-25 00:18:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:53,357 INFO L225 Difference]: With dead ends: 64 [2024-09-25 00:18:53,357 INFO L226 Difference]: Without dead ends: 31 [2024-09-25 00:18:53,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 00:18:53,364 INFO L434 NwaCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:53,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:18:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-25 00:18:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-25 00:18:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:18:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-25 00:18:53,454 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-25 00:18:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:53,456 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-25 00:18:53,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 00:18:53,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:53,461 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-25 00:18:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:18:53,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:53,463 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:53,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:18:53,464 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:53,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1787806574, now seen corresponding path program 1 times [2024-09-25 00:18:53,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:53,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117480865] [2024-09-25 00:18:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:53,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:53,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877733923] [2024-09-25 00:18:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:53,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:53,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:18:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:53,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 00:18:53,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:53,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:53,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:18:53,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:53,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:53,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:53,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 00:18:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:54,022 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:18:54,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117480865] [2024-09-25 00:18:54,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:54,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877733923] [2024-09-25 00:18:54,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877733923] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:54,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-25 00:18:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441289954] [2024-09-25 00:18:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:54,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 00:18:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 00:18:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-25 00:18:54,030 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 00:18:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:54,234 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2024-09-25 00:18:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:18:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-25 00:18:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:54,238 INFO L225 Difference]: With dead ends: 46 [2024-09-25 00:18:54,238 INFO L226 Difference]: Without dead ends: 44 [2024-09-25 00:18:54,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:54,240 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:54,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:18:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-25 00:18:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-09-25 00:18:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:18:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-25 00:18:54,259 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 24 [2024-09-25 00:18:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:54,260 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-25 00:18:54,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-25 00:18:54,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-25 00:18:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-25 00:18:54,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:54,263 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:54,279 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 00:18:54,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:54,464 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:54,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1422973788, now seen corresponding path program 1 times [2024-09-25 00:18:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:54,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643451657] [2024-09-25 00:18:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:54,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:54,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775935404] [2024-09-25 00:18:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:54,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:54,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:18:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:54,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-25 00:18:54,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:54,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:18:54,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:54,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:54,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 00:18:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643451657] [2024-09-25 00:18:54,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:54,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775935404] [2024-09-25 00:18:54,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775935404] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:18:54,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:18:54,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-25 00:18:54,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034772085] [2024-09-25 00:18:54,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:18:54,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 00:18:54,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:54,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 00:18:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:18:54,976 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:18:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:55,304 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-09-25 00:18:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:18:55,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-25 00:18:55,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:55,309 INFO L225 Difference]: With dead ends: 52 [2024-09-25 00:18:55,310 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 00:18:55,311 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:18:55,313 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:55,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 00:18:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 00:18:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-25 00:18:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:18:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-09-25 00:18:55,334 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2024-09-25 00:18:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:55,335 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-09-25 00:18:55,335 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:18:55,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-09-25 00:18:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 00:18:55,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:55,338 INFO L216 NwaCegarLoop]: trace histogram [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] [2024-09-25 00:18:55,356 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:18:55,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:55,543 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:55,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 480719411, now seen corresponding path program 1 times [2024-09-25 00:18:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:55,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921203282] [2024-09-25 00:18:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877645374] [2024-09-25 00:18:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:55,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:55,601 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:55,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:18:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:55,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-09-25 00:18:55,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:55,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:55,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:55,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:18:55,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:56,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:56,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:56,035 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 [2024-09-25 00:18:56,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 00:18:56,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 00:18:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:56,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:18:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:18:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921203282] [2024-09-25 00:18:56,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:18:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877645374] [2024-09-25 00:18:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877645374] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:18:56,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:18:56,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-25 00:18:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117436671] [2024-09-25 00:18:56,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:56,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:18:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:18:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-25 00:18:56,610 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:18:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:57,407 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-25 00:18:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:18:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-09-25 00:18:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:57,409 INFO L225 Difference]: With dead ends: 63 [2024-09-25 00:18:57,409 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 00:18:57,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:18:57,412 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:57,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 244 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 00:18:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 00:18:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-25 00:18:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 00:18:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-09-25 00:18:57,444 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 35 [2024-09-25 00:18:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:57,444 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-09-25 00:18:57,444 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (12), 7 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:18:57,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-09-25 00:18:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 00:18:57,446 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:57,446 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:18:57,465 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 00:18:57,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:57,648 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:57,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash 474321093, now seen corresponding path program 1 times [2024-09-25 00:18:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:57,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788663399] [2024-09-25 00:18:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:57,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600317165] [2024-09-25 00:18:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:57,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:57,703 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:18:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:57,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-09-25 00:18:57,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:57,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:57,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:57,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:18:57,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:57,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:58,607 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 9 [2024-09-25 00:18:59,319 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 20 treesize of output 12 [2024-09-25 00:18:59,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:59,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2024-09-25 00:18:59,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-25 00:18:59,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:18:59,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 62 [2024-09-25 00:18:59,486 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 24 treesize of output 12 [2024-09-25 00:18:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:18:59,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:19:00,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-09-25 00:19:01,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2024-09-25 00:19:01,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-09-25 00:19:01,455 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 39 [2024-09-25 00:19:01,464 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 35 [2024-09-25 00:20:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:20:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788663399] [2024-09-25 00:20:30,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:20:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600317165] [2024-09-25 00:20:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600317165] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:20:30,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:20:30,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-25 00:20:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008820844] [2024-09-25 00:20:30,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:20:30,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:20:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:20:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:20:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1050, Unknown=22, NotChecked=0, Total=1190 [2024-09-25 00:20:30,500 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:20:34,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:21:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:00,899 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2024-09-25 00:21:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 00:21:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-25 00:21:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:00,902 INFO L225 Difference]: With dead ends: 68 [2024-09-25 00:21:00,902 INFO L226 Difference]: Without dead ends: 58 [2024-09-25 00:21:00,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 115.3s TimeCoverageRelationStatistics Valid=237, Invalid=2087, Unknown=28, NotChecked=0, Total=2352 [2024-09-25 00:21:00,904 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:00,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 139 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 527 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-25 00:21:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-25 00:21:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-09-25 00:21:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-09-25 00:21:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-09-25 00:21:00,924 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 47 [2024-09-25 00:21:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:00,925 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-09-25 00:21:00,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:21:00,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-09-25 00:21:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-25 00:21:00,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:00,927 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:00,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:01,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:01,132 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:01,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -343327357, now seen corresponding path program 1 times [2024-09-25 00:21:01,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:01,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084992697] [2024-09-25 00:21:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:01,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677719772] [2024-09-25 00:21:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:01,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:01,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:21:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:01,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-09-25 00:21:01,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:01,356 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 1 [2024-09-25 00:21:01,361 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 15 treesize of output 1 [2024-09-25 00:21:01,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:01,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:01,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:02,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2024-09-25 00:21:02,411 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 30 treesize of output 26 [2024-09-25 00:21:02,417 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 35 treesize of output 27 [2024-09-25 00:21:02,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-09-25 00:21:03,155 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 31 treesize of output 23 [2024-09-25 00:21:03,163 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 [2024-09-25 00:21:03,169 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 [2024-09-25 00:21:03,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:21:03,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 59 [2024-09-25 00:21:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:21:03,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:09,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:09,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084992697] [2024-09-25 00:21:09,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:09,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677719772] [2024-09-25 00:21:09,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677719772] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:09,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:09,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-25 00:21:09,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144534038] [2024-09-25 00:21:09,812 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:09,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:21:09,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:21:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=942, Unknown=1, NotChecked=0, Total=1056 [2024-09-25 00:21:09,815 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:21:13,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:21:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:15,758 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-09-25 00:21:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 00:21:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-25 00:21:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:15,763 INFO L225 Difference]: With dead ends: 66 [2024-09-25 00:21:15,763 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:21:15,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=246, Invalid=2009, Unknown=1, NotChecked=0, Total=2256 [2024-09-25 00:21:15,765 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:15,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 558 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-25 00:21:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:21:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-09-25 00:21:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-25 00:21:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-09-25 00:21:15,796 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 47 [2024-09-25 00:21:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:15,797 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-09-25 00:21:15,798 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 00:21:15,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-09-25 00:21:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 00:21:15,800 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:15,800 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2024-09-25 00:21:15,831 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:21:16,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 00:21:16,001 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:16,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1442337340, now seen corresponding path program 2 times [2024-09-25 00:21:16,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:16,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343035082] [2024-09-25 00:21:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:16,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016161755] [2024-09-25 00:21:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:21:16,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:16,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:16,073 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:21:16,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:21:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:16,210 WARN L260 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-09-25 00:21:16,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:16,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:16,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:16,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:21:16,245 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 [2024-09-25 00:21:16,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:16,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:16,818 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 13 treesize of output 9 [2024-09-25 00:21:17,333 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 13 treesize of output 9 [2024-09-25 00:21:18,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-09-25 00:21:18,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 00:21:18,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:22,952 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 49 treesize of output 41 [2024-09-25 00:21:22,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-09-25 00:21:22,983 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 37 treesize of output 33 [2024-09-25 00:21:27,045 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|)) (.cse4 (select .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse5 (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse6 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13| Int)) (= (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13|) (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_13|) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_13|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|))))))) (and (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13| Int)) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_13|)) (.cse1 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_13|))) (or (= .cse0 (+ (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_13|) (* .cse1 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|)))) (not (= .cse0 (+ (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 0)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_13|) (* (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse3 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse4 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_13|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_13|) .cse1))))))) (or (= (+ (select .cse2 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 1) .cse5) .cse6) (or (< (+ .cse5 (* .cse4 .cse5)) (+ 1 (select (select |c_#memory_int#3| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|))) .cse6) (or (= (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 1) .cse6)))) is different from false [2024-09-25 00:21:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343035082] [2024-09-25 00:21:27,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:21:27,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016161755] [2024-09-25 00:21:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016161755] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:21:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-25 00:21:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088369708] [2024-09-25 00:21:27,936 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:27,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:21:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:21:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=731, Unknown=1, NotChecked=54, Total=870 [2024-09-25 00:21:27,937 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 00:21:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:29,853 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2024-09-25 00:21:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:21:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 60 [2024-09-25 00:21:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:29,855 INFO L225 Difference]: With dead ends: 68 [2024-09-25 00:21:29,855 INFO L226 Difference]: Without dead ends: 62 [2024-09-25 00:21:29,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=150, Invalid=1335, Unknown=1, NotChecked=74, Total=1560 [2024-09-25 00:21:29,856 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:29,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 149 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-25 00:21:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-25 00:21:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-09-25 00:21:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-25 00:21:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2024-09-25 00:21:29,895 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 60 [2024-09-25 00:21:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:29,896 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2024-09-25 00:21:29,896 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-25 00:21:29,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2024-09-25 00:21:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 00:21:29,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:29,900 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:21:29,920 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 00:21:30,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:30,101 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:30,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1661192058, now seen corresponding path program 1 times [2024-09-25 00:21:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420227503] [2024-09-25 00:21:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:30,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:30,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:21:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:30,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:21:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:30,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:21:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:30,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 00:21:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:21:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:21:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:21:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:21:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:21:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-25 00:21:31,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:21:31,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420227503] [2024-09-25 00:21:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420227503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:21:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104544595] [2024-09-25 00:21:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:31,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:31,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:31,991 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:31,992 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:21:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:21:32,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 00:21:32,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:32,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:32,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:21:32,408 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 13 treesize of output 9 [2024-09-25 00:21:32,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-25 00:21:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 00:21:32,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:33,095 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 13 treesize of output 9 [2024-09-25 00:21:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 00:21:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104544595] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:21:33,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:21:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 12] total 31 [2024-09-25 00:21:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690602624] [2024-09-25 00:21:33,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:21:33,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-25 00:21:33,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:21:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-25 00:21:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:21:33,564 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 31 states, 23 states have (on average 2.347826086956522) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-25 00:21:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:21:35,020 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2024-09-25 00:21:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:21:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.347826086956522) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) Word has length 60 [2024-09-25 00:21:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:21:35,022 INFO L225 Difference]: With dead ends: 80 [2024-09-25 00:21:35,022 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 00:21:35,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:21:35,023 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:21:35,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 183 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 00:21:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 00:21:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-09-25 00:21:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (23), 13 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-25 00:21:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-09-25 00:21:35,053 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 60 [2024-09-25 00:21:35,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:21:35,054 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-09-25 00:21:35,054 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.347826086956522) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (17), 10 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-25 00:21:35,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-09-25 00:21:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 00:21:35,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:21:35,056 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1] [2024-09-25 00:21:35,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 00:21:35,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:35,259 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:21:35,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:21:35,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1588805500, now seen corresponding path program 2 times [2024-09-25 00:21:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:21:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554874421] [2024-09-25 00:21:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:21:35,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:21:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:21:35,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996200648] [2024-09-25 00:21:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:21:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:21:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:21:35,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:21:35,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:21:35,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:21:35,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:21:35,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-09-25 00:21:35,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:21:35,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:35,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:35,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:21:35,977 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 46 treesize of output 34 [2024-09-25 00:21:35,984 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 48 treesize of output 36 [2024-09-25 00:21:36,034 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 24 [2024-09-25 00:21:36,039 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 24 treesize of output 20 [2024-09-25 00:21:36,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 00:21:36,335 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 31 treesize of output 23 [2024-09-25 00:21:36,339 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 [2024-09-25 00:21:36,344 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 [2024-09-25 00:21:36,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:21:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-25 00:21:36,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:21:38,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:21:38,184 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 90 treesize of output 89 [2024-09-25 00:21:38,220 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 8 treesize of output 4 [2024-09-25 00:22:22,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554874421] [2024-09-25 00:22:22,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996200648] [2024-09-25 00:22:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996200648] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:22,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:22,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 00:22:22,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668751980] [2024-09-25 00:22:22,590 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:22,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 00:22:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 00:22:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=432, Unknown=8, NotChecked=0, Total=506 [2024-09-25 00:22:22,592 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-25 00:22:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:23,687 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-09-25 00:22:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:22:23,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2024-09-25 00:22:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:23,689 INFO L225 Difference]: With dead ends: 74 [2024-09-25 00:22:23,689 INFO L226 Difference]: Without dead ends: 68 [2024-09-25 00:22:23,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=201, Invalid=1051, Unknown=8, NotChecked=0, Total=1260 [2024-09-25 00:22:23,690 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:23,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 92 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 00:22:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-25 00:22:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-09-25 00:22:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 10 states have call predecessors, (12), 12 states have return successors, (23), 13 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-25 00:22:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-09-25 00:22:23,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 60 [2024-09-25 00:22:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:23,723 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-09-25 00:22:23,723 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-25 00:22:23,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-09-25 00:22:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 00:22:23,725 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:23,725 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:23,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 00:22:23,929 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:23,930 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:23,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1369950782, now seen corresponding path program 2 times [2024-09-25 00:22:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:23,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526865794] [2024-09-25 00:22:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:23,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627694844] [2024-09-25 00:22:23,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:22:23,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:23,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:23,965 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:23,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:22:24,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:22:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:24,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-25 00:22:24,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:24,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 100 [2024-09-25 00:22:24,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:22:24,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:24,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:24,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:22:24,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:24,931 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 13 treesize of output 9 [2024-09-25 00:22:25,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:25,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-25 00:22:25,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:31,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526865794] [2024-09-25 00:22:31,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627694844] [2024-09-25 00:22:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627694844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:31,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:31,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 00:22:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600114903] [2024-09-25 00:22:31,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:31,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:22:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:22:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=627, Unknown=1, NotChecked=0, Total=702 [2024-09-25 00:22:31,573 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:22:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:32,685 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-09-25 00:22:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:22:32,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2024-09-25 00:22:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:32,688 INFO L225 Difference]: With dead ends: 76 [2024-09-25 00:22:32,688 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 00:22:32,688 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=115, Invalid=1006, Unknown=1, NotChecked=0, Total=1122 [2024-09-25 00:22:32,689 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:32,689 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 108 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:22:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 00:22:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-09-25 00:22:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 12 states have call successors, (12), 10 states have call predecessors, (12), 13 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2024-09-25 00:22:32,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-09-25 00:22:32,718 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 60 [2024-09-25 00:22:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:32,718 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-09-25 00:22:32,719 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-25 00:22:32,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:32,719 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-09-25 00:22:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 00:22:32,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:32,720 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:32,920 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 00:22:32,921 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:32,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:32,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1693025251, now seen corresponding path program 3 times [2024-09-25 00:22:32,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:32,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770858355] [2024-09-25 00:22:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:32,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:32,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597139252] [2024-09-25 00:22:32,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:22:32,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:32,964 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:32,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:22:33,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:22:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:33,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 187 conjuncts are in the unsatisfiable core [2024-09-25 00:22:33,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:33,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:22:33,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:33,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:22:33,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:33,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:33,793 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 13 treesize of output 9 [2024-09-25 00:22:34,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:34,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-25 00:22:34,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:34,927 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:22:34,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:41,892 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 86 treesize of output 82 [2024-09-25 00:22:41,940 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 86 treesize of output 82 [2024-09-25 00:22:42,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-09-25 00:22:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770858355] [2024-09-25 00:22:42,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597139252] [2024-09-25 00:22:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597139252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:42,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:42,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-25 00:22:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861679476] [2024-09-25 00:22:42,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:42,213 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 00:22:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 00:22:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=789, Unknown=1, NotChecked=0, Total=870 [2024-09-25 00:22:42,215 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 00:22:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:43,473 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2024-09-25 00:22:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:22:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 73 [2024-09-25 00:22:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:43,475 INFO L225 Difference]: With dead ends: 76 [2024-09-25 00:22:43,475 INFO L226 Difference]: Without dead ends: 70 [2024-09-25 00:22:43,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=158, Invalid=1481, Unknown=1, NotChecked=0, Total=1640 [2024-09-25 00:22:43,476 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:43,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 140 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 00:22:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-25 00:22:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-09-25 00:22:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 10 states have call predecessors, (12), 14 states have return successors, (27), 15 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-25 00:22:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-09-25 00:22:43,507 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 73 [2024-09-25 00:22:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:43,507 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-09-25 00:22:43,507 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 10 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 00:22:43,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-09-25 00:22:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 00:22:43,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:43,509 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 00:22:43,526 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:43,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 00:22:43,709 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:43,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -608758051, now seen corresponding path program 3 times [2024-09-25 00:22:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:43,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043460022] [2024-09-25 00:22:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:43,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:43,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587836495] [2024-09-25 00:22:43,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:22:43,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:43,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:43,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:43,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:22:43,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:22:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:43,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-09-25 00:22:43,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:43,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:22:44,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:44,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:22:44,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:44,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:44,976 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 13 treesize of output 9 [2024-09-25 00:22:45,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:45,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-25 00:22:45,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:49,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043460022] [2024-09-25 00:22:49,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587836495] [2024-09-25 00:22:49,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587836495] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:49,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:49,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 00:22:49,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210242772] [2024-09-25 00:22:49,531 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:49,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 00:22:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:49,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 00:22:49,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2024-09-25 00:22:49,532 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-25 00:22:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:50,953 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-09-25 00:22:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:22:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2024-09-25 00:22:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:50,955 INFO L225 Difference]: With dead ends: 80 [2024-09-25 00:22:50,955 INFO L226 Difference]: Without dead ends: 74 [2024-09-25 00:22:50,956 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:22:50,956 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:50,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 156 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-25 00:22:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-25 00:22:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-09-25 00:22:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 12 states have call successors, (12), 10 states have call predecessors, (12), 15 states have return successors, (29), 16 states have call predecessors, (29), 10 states have call successors, (29) [2024-09-25 00:22:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-09-25 00:22:50,982 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 73 [2024-09-25 00:22:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:50,982 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-09-25 00:22:50,982 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-25 00:22:50,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-09-25 00:22:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 00:22:50,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:50,984 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-09-25 00:22:50,999 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-25 00:22:51,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:51,186 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:51,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 101233945, now seen corresponding path program 4 times [2024-09-25 00:22:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:51,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047804458] [2024-09-25 00:22:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:51,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:22:51,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465504134] [2024-09-25 00:22:51,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:22:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:22:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:22:51,221 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:22:51,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:22:51,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:22:51,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:22:51,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-09-25 00:22:51,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:22:51,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:51,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:22:51,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:51,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:22:52,131 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 13 treesize of output 9 [2024-09-25 00:22:52,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:52,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:22:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-25 00:22:52,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:22:54,599 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 27 [2024-09-25 00:22:55,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:22:55,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047804458] [2024-09-25 00:22:55,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:22:55,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465504134] [2024-09-25 00:22:55,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465504134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:22:55,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:22:55,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 00:22:55,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727317261] [2024-09-25 00:22:55,818 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:22:55,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 00:22:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:22:55,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 00:22:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2024-09-25 00:22:55,820 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 00:22:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:22:57,105 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2024-09-25 00:22:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:22:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 73 [2024-09-25 00:22:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:22:57,106 INFO L225 Difference]: With dead ends: 84 [2024-09-25 00:22:57,106 INFO L226 Difference]: Without dead ends: 78 [2024-09-25 00:22:57,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2024-09-25 00:22:57,108 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-25 00:22:57,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 148 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-25 00:22:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-25 00:22:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2024-09-25 00:22:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 12 states have call successors, (12), 10 states have call predecessors, (12), 17 states have return successors, (32), 18 states have call predecessors, (32), 10 states have call successors, (32) [2024-09-25 00:22:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2024-09-25 00:22:57,138 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 73 [2024-09-25 00:22:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:22:57,138 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2024-09-25 00:22:57,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-25 00:22:57,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2024-09-25 00:22:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-25 00:22:57,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:22:57,140 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:22:57,154 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 00:22:57,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 00:22:57,341 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:22:57,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:22:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash 595133078, now seen corresponding path program 5 times [2024-09-25 00:22:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:22:57,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033049235] [2024-09-25 00:22:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:22:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:22:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:22:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:22:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:22:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-25 00:22:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:22:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:58,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:22:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:59,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:22:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:22:59,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:22:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:00,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:23:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:00,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:23:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:01,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:23:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:01,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-25 00:23:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:01,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:23:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:23:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 00:23:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:23:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033049235] [2024-09-25 00:23:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033049235] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:23:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718957633] [2024-09-25 00:23:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:23:01,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:23:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:23:01,594 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:23:01,596 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 00:23:01,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 00:23:01,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:23:01,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-09-25 00:23:01,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:23:01,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:23:01,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:23:02,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-25 00:23:02,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-25 00:23:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-09-25 00:23:02,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:23:03,741 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 13 treesize of output 9 [2024-09-25 00:23:04,091 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 13 treesize of output 9 [2024-09-25 00:23:04,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-09-25 00:23:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-25 00:23:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718957633] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:23:05,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:23:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 20] total 52 [2024-09-25 00:23:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993947554] [2024-09-25 00:23:05,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:23:05,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-25 00:23:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:23:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-25 00:23:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 00:23:05,164 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 52 states, 37 states have (on average 2.27027027027027) internal successors, (84), 46 states have internal predecessors, (84), 26 states have call successors, (31), 8 states have call predecessors, (31), 10 states have return successors, (30), 21 states have call predecessors, (30), 25 states have call successors, (30)