./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --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-de32597-m [2024-09-18 16:48:36,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:48:36,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:48:36,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:48:36,208 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:48:36,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:48:36,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:48:36,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:48:36,235 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:48:36,235 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:48:36,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:48:36,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:48:36,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:48:36,236 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:48:36,237 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:48:36,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:48:36,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:48:36,237 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:48:36,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:48:36,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:48:36,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:48:36,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:48:36,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:48:36,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:48:36,239 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:48:36,240 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:48:36,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:48:36,240 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:48:36,240 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:48:36,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:48:36,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:48:36,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:48:36,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:48:36,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:48:36,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:48:36,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:48:36,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:48:36,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:48:36,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:48:36,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:48:36,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:48:36,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:48:36,244 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:48:36,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:48:36,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:48:36,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:48:36,478 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:48:36,479 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:48:36,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-18 16:48:37,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:48:38,029 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:48:38,029 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-18 16:48:38,036 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/35bcaadf0/80f0616965a1493f9bc64ea9768bcc39/FLAG366ce46a5 [2024-09-18 16:48:38,051 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/35bcaadf0/80f0616965a1493f9bc64ea9768bcc39 [2024-09-18 16:48:38,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:48:38,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:48:38,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:48:38,058 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:48:38,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:48:38,063 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,064 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9417103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38, skipping insertion in model container [2024-09-18 16:48:38,064 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:48:38,206 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_fermat2-ll.c[1060,1073] [2024-09-18 16:48:38,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:48:38,227 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:48:38,238 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_fermat2-ll.c[1060,1073] [2024-09-18 16:48:38,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:48:38,258 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:48:38,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38 WrapperNode [2024-09-18 16:48:38,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:48:38,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:48:38,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:48:38,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:48:38,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,277 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:48:38,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:48:38,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:48:38,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:48:38,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:48:38,286 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,312 INFO L175 MemorySlicer]: Split 36 memory accesses to 5 slices as follows [2, 8, 6, 10, 10]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 3, 1, 2, 2]. [2024-09-18 16:48:38,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:48:38,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:48:38,334 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:48:38,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:48:38,335 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (1/1) ... [2024-09-18 16:48:38,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:48:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:38,365 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) [2024-09-18 16:48:38,369 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 [2024-09-18 16:48:38,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:48:38,409 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:48:38,409 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:48:38,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:48:38,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:48:38,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:48:38,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 16:48:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-18 16:48:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-18 16:48:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-18 16:48:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-18 16:48:38,411 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2024-09-18 16:48:38,412 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:48:38,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:48:38,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:48:38,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:48:38,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:48:38,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-18 16:48:38,495 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:48:38,497 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:48:38,765 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-18 16:48:38,765 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:48:38,781 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:48:38,781 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:48:38,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:48:38 BoogieIcfgContainer [2024-09-18 16:48:38,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:48:38,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:48:38,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:48:38,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:48:38,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:48:38" (1/3) ... [2024-09-18 16:48:38,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fe482b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:48:38, skipping insertion in model container [2024-09-18 16:48:38,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:48:38" (2/3) ... [2024-09-18 16:48:38,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fe482b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:48:38, skipping insertion in model container [2024-09-18 16:48:38,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:48:38" (3/3) ... [2024-09-18 16:48:38,796 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2024-09-18 16:48:38,815 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:48:38,816 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:48:38,867 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:48:38,874 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;@46859a0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:48:38,875 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:48:38,878 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) [2024-09-18 16:48:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:48:38,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:38,885 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] [2024-09-18 16:48:38,886 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:38,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash -896464560, now seen corresponding path program 1 times [2024-09-18 16:48:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:38,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512772410] [2024-09-18 16:48:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:48:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:48:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:48:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:48:39,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:39,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512772410] [2024-09-18 16:48:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512772410] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:48:39,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:48:39,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:48:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049164491] [2024-09-18 16:48:39,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:48:39,067 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:48:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:48:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:48:39,094 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) [2024-09-18 16:48:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:39,117 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-18 16:48:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:48:39,119 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 [2024-09-18 16:48:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:39,124 INFO L225 Difference]: With dead ends: 64 [2024-09-18 16:48:39,124 INFO L226 Difference]: Without dead ends: 31 [2024-09-18 16:48:39,126 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 [2024-09-18 16:48:39,128 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 [2024-09-18 16:48:39,129 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] [2024-09-18 16:48:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-18 16:48:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-18 16:48:39,154 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) [2024-09-18 16:48:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-18 16:48:39,158 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-18 16:48:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:39,159 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-18 16:48:39,159 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) [2024-09-18 16:48:39,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-18 16:48:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-18 16:48:39,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:39,161 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] [2024-09-18 16:48:39,161 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:48:39,161 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:39,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1783747884, now seen corresponding path program 1 times [2024-09-18 16:48:39,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:39,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022744363] [2024-09-18 16:48:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:39,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544481800] [2024-09-18 16:48:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:39,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:39,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:39,222 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) [2024-09-18 16:48:39,223 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:48:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:39,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-18 16:48:39,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:39,402 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 15 treesize of output 1 [2024-09-18 16:48:39,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:48:39,437 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 [2024-09-18 16:48:39,469 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 [2024-09-18 16:48:39,685 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 31 [2024-09-18 16:48:39,699 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 [2024-09-18 16:48:39,709 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 56 treesize of output 32 [2024-09-18 16:48:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:48:39,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:48:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022744363] [2024-09-18 16:48:39,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544481800] [2024-09-18 16:48:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544481800] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:48:39,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:48:39,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-18 16:48:39,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185491580] [2024-09-18 16:48:39,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:48:39,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 16:48:39,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 16:48:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-18 16:48:39,846 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) [2024-09-18 16:48:41,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:48:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:48:41,846 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-09-18 16:48:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 16:48:41,846 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 [2024-09-18 16:48:41,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:48:41,849 INFO L225 Difference]: With dead ends: 49 [2024-09-18 16:48:41,849 INFO L226 Difference]: Without dead ends: 47 [2024-09-18 16:48:41,849 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:48:41,850 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:48:41,851 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-18 16:48:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-18 16:48:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-18 16:48:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-18 16:48:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-09-18 16:48:41,866 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 24 [2024-09-18 16:48:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:48:41,866 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-09-18 16:48:41,866 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) [2024-09-18 16:48:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-09-18 16:48:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 16:48:41,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:48:41,868 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] [2024-09-18 16:48:41,888 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:48:42,068 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 [2024-09-18 16:48:42,069 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:48:42,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:48:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash -391677542, now seen corresponding path program 1 times [2024-09-18 16:48:42,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:48:42,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572786521] [2024-09-18 16:48:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:48:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:48:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741966564] [2024-09-18 16:48:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:48:42,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:48:42,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:48:42,147 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) [2024-09-18 16:48:42,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:48:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:48:42,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 16:48:42,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:48:42,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:48:42,393 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 [2024-09-18 16:48:42,409 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 [2024-09-18 16:48:42,460 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 27 [2024-09-18 16:48:42,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-18 16:48:42,865 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 91 treesize of output 55 [2024-09-18 16:48:42,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:48:42,887 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 61 treesize of output 57 [2024-09-18 16:48:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:48:43,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:48:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:48:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572786521] [2024-09-18 16:48:47,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:48:47,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741966564] [2024-09-18 16:48:47,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741966564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:48:47,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:48:47,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-18 16:48:47,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382178495] [2024-09-18 16:48:47,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:48:47,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 16:48:47,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:48:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 16:48:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-09-18 16:48:47,491 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:48:51,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:55,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:48:59,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:00,819 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-18 16:49:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 16:49:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-18 16:49:00,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:00,820 INFO L225 Difference]: With dead ends: 60 [2024-09-18 16:49:00,820 INFO L226 Difference]: Without dead ends: 52 [2024-09-18 16:49:00,821 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 16:49:00,822 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:00,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 418 Invalid, 3 Unknown, 0 Unchecked, 13.0s Time] [2024-09-18 16:49:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-18 16:49:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-18 16:49:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-18 16:49:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-18 16:49:00,837 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2024-09-18 16:49:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:00,837 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-18 16:49:00,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-18 16:49:00,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-18 16:49:00,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-18 16:49:00,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:00,839 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] [2024-09-18 16:49:00,853 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:01,042 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 [2024-09-18 16:49:01,044 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1901447163, now seen corresponding path program 1 times [2024-09-18 16:49:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:01,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283103134] [2024-09-18 16:49:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:01,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135706105] [2024-09-18 16:49:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:01,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:01,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:01,115 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) [2024-09-18 16:49:01,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:49:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:01,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-18 16:49:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:01,243 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 [2024-09-18 16:49:01,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:49:01,315 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 [2024-09-18 16:49:01,327 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 [2024-09-18 16:49:01,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-09-18 16:49:01,644 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 [2024-09-18 16:49:01,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2024-09-18 16:49:01,789 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 56 treesize of output 40 [2024-09-18 16:49:01,793 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 109 treesize of output 65 [2024-09-18 16:49:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 16:49:01,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:49:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 16:49:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:49:19,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283103134] [2024-09-18 16:49:19,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:49:19,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135706105] [2024-09-18 16:49:19,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135706105] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:49:19,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 16:49:19,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2024-09-18 16:49:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517890260] [2024-09-18 16:49:19,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 16:49:19,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 16:49:19,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:49:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 16:49:19,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-09-18 16:49:19,787 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:49:23,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:28,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:49:29,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:49:32,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:49:51,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:49:54,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:49:55,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-18 16:49:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:49:57,119 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2024-09-18 16:49:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-18 16:49:57,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2024-09-18 16:49:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:49:57,123 INFO L225 Difference]: With dead ends: 83 [2024-09-18 16:49:57,123 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 16:49:57,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=228, Invalid=1331, Unknown=1, NotChecked=0, Total=1560 [2024-09-18 16:49:57,125 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2024-09-18 16:49:57,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 286 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 530 Invalid, 2 Unknown, 0 Unchecked, 19.3s Time] [2024-09-18 16:49:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 16:49:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-09-18 16:49:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2024-09-18 16:49:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2024-09-18 16:49:57,166 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2024-09-18 16:49:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:49:57,167 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2024-09-18 16:49:57,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-18 16:49:57,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2024-09-18 16:49:57,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:49:57,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:49:57,169 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] [2024-09-18 16:49:57,177 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 16:49:57,372 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 [2024-09-18 16:49:57,373 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:49:57,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:49:57,373 INFO L85 PathProgramCache]: Analyzing trace with hash 987710829, now seen corresponding path program 1 times [2024-09-18 16:49:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:49:57,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892300781] [2024-09-18 16:49:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:57,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:49:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:49:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130344248] [2024-09-18 16:49:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:49:57,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:49:57,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:49:57,441 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) [2024-09-18 16:49:57,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:49:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:49:57,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-18 16:49:57,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:49:57,680 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 [2024-09-18 16:49:57,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:49:57,760 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 [2024-09-18 16:49:57,772 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 [2024-09-18 16:49:57,809 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 27 [2024-09-18 16:49:57,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-18 16:50:10,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2024-09-18 16:50:10,702 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 93 treesize of output 57 [2024-09-18 16:50:10,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 59 [2024-09-18 16:50:10,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:50:10,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 61 [2024-09-18 16:50:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 16:50:11,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:50:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:50:17,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892300781] [2024-09-18 16:50:17,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:50:17,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130344248] [2024-09-18 16:50:17,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130344248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:50:17,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:50:17,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-18 16:50:17,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121346485] [2024-09-18 16:50:17,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:50:17,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 16:50:17,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:50:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 16:50:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=518, Unknown=2, NotChecked=0, Total=600 [2024-09-18 16:50:17,543 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 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) [2024-09-18 16:50:21,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:25,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:30,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:36,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:37,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:44,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:48,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.39s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:50,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:50:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:50:50,626 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2024-09-18 16:50:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-18 16:50:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 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 [2024-09-18 16:50:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:50:50,627 INFO L225 Difference]: With dead ends: 82 [2024-09-18 16:50:50,628 INFO L226 Difference]: Without dead ends: 76 [2024-09-18 16:50:50,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=150, Invalid=1038, Unknown=2, NotChecked=0, Total=1190 [2024-09-18 16:50:50,630 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 13 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:50:50,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 111 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 454 Invalid, 6 Unknown, 0 Unchecked, 31.4s Time] [2024-09-18 16:50:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-18 16:50:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-09-18 16:50:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-18 16:50:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-09-18 16:50:50,660 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 47 [2024-09-18 16:50:50,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:50:50,660 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-09-18 16:50:50,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.9375) internal successors, (31), 17 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) [2024-09-18 16:50:50,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:50:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-09-18 16:50:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 16:50:50,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:50:50,662 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] [2024-09-18 16:50:50,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 16:50:50,866 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 [2024-09-18 16:50:50,867 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:50:50,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:50:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1805359279, now seen corresponding path program 1 times [2024-09-18 16:50:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:50:50,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765928129] [2024-09-18 16:50:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:50:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:50:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:50:50,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93372732] [2024-09-18 16:50:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:50:50,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:50:50,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:50:50,939 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) [2024-09-18 16:50:50,940 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:50:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:50:51,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-09-18 16:50:51,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:50:51,107 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 [2024-09-18 16:50:51,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:50:51,177 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 [2024-09-18 16:50:51,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:50:51,229 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 27 [2024-09-18 16:50:51,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-18 16:51:06,326 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 [2024-09-18 16:51:06,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 57 [2024-09-18 16:51:06,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:51:06,407 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 63 treesize of output 59 [2024-09-18 16:51:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-18 16:51:07,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:51:12,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:51:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765928129] [2024-09-18 16:51:12,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:51:12,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93372732] [2024-09-18 16:51:12,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93372732] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:51:12,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:51:12,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-18 16:51:12,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795354948] [2024-09-18 16:51:12,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:51:12,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 16:51:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:51:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 16:51:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=562, Unknown=2, NotChecked=0, Total=650 [2024-09-18 16:51:12,109 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2024-09-18 16:51:16,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:20,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:24,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:26,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:26,903 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2024-09-18 16:51:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:51:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 [2024-09-18 16:51:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:26,905 INFO L225 Difference]: With dead ends: 85 [2024-09-18 16:51:26,905 INFO L226 Difference]: Without dead ends: 75 [2024-09-18 16:51:26,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=148, Invalid=1040, Unknown=2, NotChecked=0, Total=1190 [2024-09-18 16:51:26,908 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2024-09-18 16:51:26,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 528 Invalid, 3 Unknown, 0 Unchecked, 14.4s Time] [2024-09-18 16:51:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-18 16:51:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-18 16:51:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-18 16:51:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-09-18 16:51:26,962 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 47 [2024-09-18 16:51:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:26,962 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-09-18 16:51:26,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2024-09-18 16:51:26,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-09-18 16:51:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 16:51:26,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:26,964 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] [2024-09-18 16:51:26,980 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 16:51:27,167 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 [2024-09-18 16:51:27,168 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:27,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1682971646, now seen corresponding path program 2 times [2024-09-18 16:51:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587831082] [2024-09-18 16:51:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:27,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248550310] [2024-09-18 16:51:27,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:51:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:27,203 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) [2024-09-18 16:51:27,204 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:51:27,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:51:27,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:51:27,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-18 16:51:27,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:51:27,370 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 [2024-09-18 16:51:27,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:51:27,475 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 [2024-09-18 16:51:27,488 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 11 treesize of output 7 [2024-09-18 16:51:27,561 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 31 [2024-09-18 16:51:27,564 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 33 [2024-09-18 16:51:32,438 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 52 treesize of output 44 [2024-09-18 16:51:32,442 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 104 treesize of output 68 [2024-09-18 16:51:32,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:51:32,518 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 99 treesize of output 95 [2024-09-18 16:51:32,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 61 [2024-09-18 16:51:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-18 16:51:32,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:51:36,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:51:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587831082] [2024-09-18 16:51:36,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:51:36,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248550310] [2024-09-18 16:51:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248550310] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:51:36,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:51:36,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-18 16:51:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171375397] [2024-09-18 16:51:36,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:51:36,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-18 16:51:36,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:51:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-18 16:51:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2024-09-18 16:51:36,367 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 16:51:40,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:45,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:49,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:53,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:51:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:51:53,737 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2024-09-18 16:51:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-18 16:51:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 60 [2024-09-18 16:51:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:51:53,739 INFO L225 Difference]: With dead ends: 83 [2024-09-18 16:51:53,739 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 16:51:53,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 16:51:53,740 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:51:53,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 138 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 551 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2024-09-18 16:51:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 16:51:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-09-18 16:51:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-18 16:51:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-09-18 16:51:53,776 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 60 [2024-09-18 16:51:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:51:53,777 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-09-18 16:51:53,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-18 16:51:53,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-09-18 16:51:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-18 16:51:53,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:51:53,778 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] [2024-09-18 16:51:53,792 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:51:53,982 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 [2024-09-18 16:51:53,983 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:51:53,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:51:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash 628554005, now seen corresponding path program 3 times [2024-09-18 16:51:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:51:53,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128628332] [2024-09-18 16:51:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:51:53,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:51:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:51:54,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238498778] [2024-09-18 16:51:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 16:51:54,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:51:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:51:54,045 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) [2024-09-18 16:51:54,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:51:54,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 16:51:54,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:51:54,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-18 16:51:54,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:51:54,608 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 [2024-09-18 16:51:54,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:51:54,619 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 [2024-09-18 16:51:54,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-18 16:51:54,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-18 16:51:59,736 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 48 treesize of output 40 [2024-09-18 16:51:59,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 60 [2024-09-18 16:51:59,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:51:59,808 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 91 treesize of output 87 [2024-09-18 16:51:59,815 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 111 treesize of output 67 [2024-09-18 16:52:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-18 16:52:00,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:05,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128628332] [2024-09-18 16:52:05,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238498778] [2024-09-18 16:52:05,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238498778] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:52:05,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:52:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-18 16:52:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710986170] [2024-09-18 16:52:05,251 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:05,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 16:52:05,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 16:52:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=839, Unknown=1, NotChecked=0, Total=930 [2024-09-18 16:52:05,252 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 24 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-18 16:52:09,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:13,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:15,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:17,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:22,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.52s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:52:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:23,718 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-09-18 16:52:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-18 16:52:23,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-09-18 16:52:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:23,719 INFO L225 Difference]: With dead ends: 85 [2024-09-18 16:52:23,719 INFO L226 Difference]: Without dead ends: 79 [2024-09-18 16:52:23,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=171, Invalid=1634, Unknown=1, NotChecked=0, Total=1806 [2024-09-18 16:52:23,720 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:23,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 173 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 696 Invalid, 3 Unknown, 0 Unchecked, 17.9s Time] [2024-09-18 16:52:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-18 16:52:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-18 16:52:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-18 16:52:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-09-18 16:52:23,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 73 [2024-09-18 16:52:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:23,772 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-09-18 16:52:23,772 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.8) internal successors, (36), 21 states have internal predecessors, (36), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-18 16:52:23,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-09-18 16:52:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-18 16:52:23,774 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:23,774 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:23,788 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:52:23,974 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 [2024-09-18 16:52:23,974 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:23,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -362786198, now seen corresponding path program 4 times [2024-09-18 16:52:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:23,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025481100] [2024-09-18 16:52:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:23,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:52:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70544427] [2024-09-18 16:52:24,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 16:52:24,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:24,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:24,020 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) [2024-09-18 16:52:24,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 16:52:24,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 16:52:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:52:24,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-18 16:52:24,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:52:24,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:52:24,361 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 11 [2024-09-18 16:52:24,370 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 [2024-09-18 16:52:24,404 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 27 [2024-09-18 16:52:25,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2024-09-18 16:52:25,867 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 82 treesize of output 50 [2024-09-18 16:52:25,974 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:52:25,975 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 68 treesize of output 60 [2024-09-18 16:52:25,982 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 71 treesize of output 39 [2024-09-18 16:52:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 53 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 16:52:26,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:33,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:33,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025481100] [2024-09-18 16:52:33,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:33,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70544427] [2024-09-18 16:52:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70544427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:52:33,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:52:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-18 16:52:33,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546498902] [2024-09-18 16:52:33,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:33,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 16:52:33,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:33,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 16:52:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2024-09-18 16:52:33,905 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-18 16:52:37,917 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] [2024-09-18 16:52:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:52:39,453 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2024-09-18 16:52:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 16:52:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 86 [2024-09-18 16:52:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:52:39,455 INFO L225 Difference]: With dead ends: 87 [2024-09-18 16:52:39,455 INFO L226 Difference]: Without dead ends: 81 [2024-09-18 16:52:39,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2024-09-18 16:52:39,456 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-09-18 16:52:39,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 471 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2024-09-18 16:52:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-18 16:52:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-18 16:52:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 14 states have call successors, (14), 12 states have call predecessors, (14), 14 states have return successors, (31), 14 states have call predecessors, (31), 12 states have call successors, (31) [2024-09-18 16:52:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2024-09-18 16:52:39,524 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 86 [2024-09-18 16:52:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:52:39,524 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2024-09-18 16:52:39,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-18 16:52:39,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2024-09-18 16:52:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-18 16:52:39,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:52:39,527 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:52:39,541 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 16:52:39,730 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 [2024-09-18 16:52:39,731 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:52:39,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:52:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash -311680835, now seen corresponding path program 5 times [2024-09-18 16:52:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:52:39,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211839133] [2024-09-18 16:52:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:52:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:52:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:52:39,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296993157] [2024-09-18 16:52:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 16:52:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:52:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:52:39,804 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) [2024-09-18 16:52:39,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 16:52:40,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-18 16:52:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:52:40,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-09-18 16:52:40,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:52:40,298 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 [2024-09-18 16:52:40,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-18 16:52:40,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-18 16:52:40,372 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 [2024-09-18 16:52:40,411 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 31 treesize of output 27 [2024-09-18 16:52:40,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-18 16:52:50,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2024-09-18 16:52:50,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 71 [2024-09-18 16:52:50,367 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 101 treesize of output 61 [2024-09-18 16:52:50,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-18 16:52:50,378 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 67 treesize of output 63 [2024-09-18 16:52:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 7 proven. 89 refuted. 26 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-18 16:52:50,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:52:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:52:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211839133] [2024-09-18 16:52:55,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:52:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296993157] [2024-09-18 16:52:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296993157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:52:55,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:52:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-18 16:52:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067175472] [2024-09-18 16:52:55,927 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 16:52:55,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-18 16:52:55,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:52:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-18 16:52:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1196, Unknown=1, NotChecked=0, Total=1332 [2024-09-18 16:52:55,931 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 30 states, 24 states have (on average 1.75) internal successors, (42), 27 states have internal predecessors, (42), 10 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-18 16:53:00,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:53:04,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:53:08,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:53:12,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-18 16:53:16,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]