./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.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 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 04:04:25,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 04:04:25,327 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 04:04:25,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 04:04:25,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 04:04:25,353 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 04:04:25,354 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 04:04:25,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 04:04:25,356 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 04:04:25,358 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 04:04:25,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 04:04:25,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 04:04:25,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 04:04:25,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 04:04:25,361 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 04:04:25,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 04:04:25,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 04:04:25,361 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 04:04:25,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 04:04:25,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 04:04:25,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 04:04:25,367 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 04:04:25,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 04:04:25,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 04:04:25,368 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 04:04:25,368 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 04:04:25,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 04:04:25,368 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 04:04:25,370 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 04:04:25,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 04:04:25,371 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 04:04:25,371 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 04:04:25,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:04:25,372 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 04:04:25,372 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 04:04:25,372 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 04:04:25,372 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 04:04:25,373 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 04:04:25,373 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 04:04:25,373 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 04:04:25,373 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 04:04:25,374 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 04:04:25,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 04:04:25,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 04:04:25,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 04:04:25,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 04:04:25,695 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 04:04:25,695 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 04:04:25,697 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-13 04:04:27,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 04:04:27,383 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 04:04:27,384 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-13 04:04:27,400 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6ce543ad5/b7a124998a63442c9aca9255fb1f43ae/FLAGa24c14812 [2024-09-13 04:04:27,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6ce543ad5/b7a124998a63442c9aca9255fb1f43ae [2024-09-13 04:04:27,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 04:04:27,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 04:04:27,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 04:04:27,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 04:04:27,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 04:04:27,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:04:27" (1/1) ... [2024-09-13 04:04:27,785 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b0f248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:27, skipping insertion in model container [2024-09-13 04:04:27,785 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:04:27" (1/1) ... [2024-09-13 04:04:27,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 04:04:27,977 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-13 04:04:28,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:04:28,046 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 04:04:28,066 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-13 04:04:28,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:04:28,131 INFO L204 MainTranslator]: Completed translation [2024-09-13 04:04:28,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28 WrapperNode [2024-09-13 04:04:28,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 04:04:28,133 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 04:04:28,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 04:04:28,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 04:04:28,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,175 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 04:04:28,178 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 04:04:28,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 04:04:28,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 04:04:28,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 04:04:28,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,196 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,220 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [2, 29, 21, 22, 35, 30]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 11 writes are split as follows [0, 3, 1, 2, 3, 2]. [2024-09-13 04:04:28,221 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 04:04:28,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 04:04:28,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 04:04:28,253 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 04:04:28,254 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (1/1) ... [2024-09-13 04:04:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:04:28,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:28,293 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) [2024-09-13 04:04:28,295 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 [2024-09-13 04:04:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 04:04:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-09-13 04:04:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-09-13 04:04:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 04:04:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 04:04:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 04:04:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 04:04:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 04:04:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 04:04:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 04:04:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-13 04:04:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 04:04:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-09-13 04:04:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 04:04:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 04:04:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 04:04:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-13 04:04:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 04:04:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 04:04:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 04:04:28,501 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 04:04:28,503 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 04:04:28,887 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 04:04:28,887 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 04:04:28,908 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 04:04:28,909 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 04:04:28,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:04:28 BoogieIcfgContainer [2024-09-13 04:04:28,910 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 04:04:28,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 04:04:28,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 04:04:28,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 04:04:28,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 04:04:27" (1/3) ... [2024-09-13 04:04:28,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762fcad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:04:28, skipping insertion in model container [2024-09-13 04:04:28,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:04:28" (2/3) ... [2024-09-13 04:04:28,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@762fcad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:04:28, skipping insertion in model container [2024-09-13 04:04:28,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:04:28" (3/3) ... [2024-09-13 04:04:28,918 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-09-13 04:04:28,932 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 04:04:28,932 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 04:04:28,987 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 04:04:28,993 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;@2831945c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 04:04:28,994 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 04:04:28,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 04:04:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 04:04:29,006 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:29,006 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:29,007 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:29,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:29,012 INFO L85 PathProgramCache]: Analyzing trace with hash -795461761, now seen corresponding path program 1 times [2024-09-13 04:04:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:29,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387008002] [2024-09-13 04:04:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:29,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:04:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:29,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:04:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:29,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:04:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:04:29,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:29,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387008002] [2024-09-13 04:04:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387008002] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 04:04:29,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 04:04:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 04:04:29,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582836384] [2024-09-13 04:04:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 04:04:29,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 04:04:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 04:04:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 04:04:29,367 INFO L87 Difference]: Start difference. First operand has 54 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 04:04:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:29,625 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2024-09-13 04:04:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 04:04:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 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 23 [2024-09-13 04:04:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:29,637 INFO L225 Difference]: With dead ends: 104 [2024-09-13 04:04:29,638 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 04:04:29,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 04:04:29,644 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:29,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 04:04:29,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 04:04:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-09-13 04:04:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 04:04:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-09-13 04:04:29,697 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 23 [2024-09-13 04:04:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:29,697 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-09-13 04:04:29,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 04:04:29,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-09-13 04:04:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 04:04:29,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:29,700 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:29,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 04:04:29,705 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:29,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1335693656, now seen corresponding path program 1 times [2024-09-13 04:04:29,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:29,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250597426] [2024-09-13 04:04:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:30,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:04:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:30,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:04:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:31,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:04:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:04:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250597426] [2024-09-13 04:04:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250597426] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 04:04:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 04:04:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-13 04:04:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012690810] [2024-09-13 04:04:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 04:04:31,285 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 04:04:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 04:04:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-09-13 04:04:31,288 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 04:04:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:32,399 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-13 04:04:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 04:04:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-13 04:04:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:32,403 INFO L225 Difference]: With dead ends: 83 [2024-09-13 04:04:32,403 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 04:04:32,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-09-13 04:04:32,405 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:32,406 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 165 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 04:04:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 04:04:32,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-09-13 04:04:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 21 states have call predecessors, (26), 21 states have call successors, (26) [2024-09-13 04:04:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-09-13 04:04:32,438 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2024-09-13 04:04:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:32,438 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-09-13 04:04:32,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 04:04:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-09-13 04:04:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 04:04:32,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:32,440 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:32,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 04:04:32,441 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:32,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287595, now seen corresponding path program 1 times [2024-09-13 04:04:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78850232] [2024-09-13 04:04:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:04:32,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091737970] [2024-09-13 04:04:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:32,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:32,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:32,490 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) [2024-09-13 04:04:32,493 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 04:04:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:32,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 04:04:32,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:04:32,983 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 [2024-09-13 04:04:33,000 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 [2024-09-13 04:04:33,006 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 [2024-09-13 04:04:33,013 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 [2024-09-13 04:04:33,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:04:33,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:04:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:04:33,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:04:33,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:33,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78850232] [2024-09-13 04:04:33,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:04:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091737970] [2024-09-13 04:04:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091737970] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:33,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:04:33,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 04:04:33,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95625268] [2024-09-13 04:04:33,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:04:33,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 04:04:33,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 04:04:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-13 04:04:33,776 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 04:04:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:34,697 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-09-13 04:04:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 04:04:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-13 04:04:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:34,699 INFO L225 Difference]: With dead ends: 99 [2024-09-13 04:04:34,699 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 04:04:34,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-13 04:04:34,701 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:34,701 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 198 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 04:04:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 04:04:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-09-13 04:04:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 26 states have call successors, (26), 11 states have call predecessors, (26), 12 states have return successors, (28), 24 states have call predecessors, (28), 23 states have call successors, (28) [2024-09-13 04:04:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2024-09-13 04:04:34,734 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 30 [2024-09-13 04:04:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:34,734 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2024-09-13 04:04:34,735 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-13 04:04:34,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2024-09-13 04:04:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 04:04:34,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:34,736 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:34,749 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 04:04:34,938 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:34,939 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:34,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 687714431, now seen corresponding path program 1 times [2024-09-13 04:04:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:34,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309049846] [2024-09-13 04:04:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:34,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:35,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:04:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:35,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:04:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:35,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:04:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:36,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:04:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 04:04:36,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309049846] [2024-09-13 04:04:36,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309049846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:36,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964042790] [2024-09-13 04:04:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:36,498 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) [2024-09-13 04:04:36,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 04:04:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:36,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-13 04:04:36,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:04:36,683 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 [2024-09-13 04:04:36,690 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 [2024-09-13 04:04:36,695 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 [2024-09-13 04:04:36,702 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 [2024-09-13 04:04:37,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:04:37,259 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 40 treesize of output 40 [2024-09-13 04:04:37,274 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 [2024-09-13 04:04:37,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 04:04:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 04:04:37,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:04:38,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964042790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:38,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:04:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-09-13 04:04:38,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3970317] [2024-09-13 04:04:38,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:04:38,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 04:04:38,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 04:04:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 04:04:38,741 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 04:04:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:41,788 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2024-09-13 04:04:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 04:04:41,789 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 30 [2024-09-13 04:04:41,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:41,791 INFO L225 Difference]: With dead ends: 133 [2024-09-13 04:04:41,791 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 04:04:41,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 04:04:41,793 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 121 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:41,794 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 359 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 04:04:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 04:04:41,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2024-09-13 04:04:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 76 states have internal predecessors, (82), 33 states have call successors, (33), 14 states have call predecessors, (33), 16 states have return successors, (38), 32 states have call predecessors, (38), 30 states have call successors, (38) [2024-09-13 04:04:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2024-09-13 04:04:41,866 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 30 [2024-09-13 04:04:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:41,866 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2024-09-13 04:04:41,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 04:04:41,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2024-09-13 04:04:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 04:04:41,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:41,868 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:41,884 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 04:04:42,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:42,069 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:42,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:42,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1967022502, now seen corresponding path program 2 times [2024-09-13 04:04:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:42,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16861608] [2024-09-13 04:04:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:42,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:04:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:42,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:04:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:43,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:04:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:43,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:04:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:43,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:04:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 04:04:44,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16861608] [2024-09-13 04:04:44,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16861608] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:44,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682507557] [2024-09-13 04:04:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:04:44,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:44,034 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) [2024-09-13 04:04:44,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 04:04:44,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:04:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:04:44,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-09-13 04:04:44,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:04:44,214 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 [2024-09-13 04:04:44,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:04:44,265 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 [2024-09-13 04:04:44,281 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 [2024-09-13 04:04:44,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:04:44,946 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 40 treesize of output 40 [2024-09-13 04:04:44,957 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 [2024-09-13 04:04:45,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 04:04:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 04:04:45,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:04:46,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682507557] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:46,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:04:46,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-09-13 04:04:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746620755] [2024-09-13 04:04:46,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:04:46,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-13 04:04:46,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-13 04:04:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1607, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 04:04:46,516 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 04:04:53,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:04:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:55,195 INFO L93 Difference]: Finished difference Result 169 states and 213 transitions. [2024-09-13 04:04:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 04:04:55,196 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 36 [2024-09-13 04:04:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:55,198 INFO L225 Difference]: With dead ends: 169 [2024-09-13 04:04:55,198 INFO L226 Difference]: Without dead ends: 167 [2024-09-13 04:04:55,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=387, Invalid=4305, Unknown=0, NotChecked=0, Total=4692 [2024-09-13 04:04:55,201 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 120 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:55,202 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 476 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2456 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2024-09-13 04:04:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-13 04:04:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 133. [2024-09-13 04:04:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 34 states have call successors, (34), 15 states have call predecessors, (34), 19 states have return successors, (41), 34 states have call predecessors, (41), 31 states have call successors, (41) [2024-09-13 04:04:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2024-09-13 04:04:55,249 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 36 [2024-09-13 04:04:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:55,250 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2024-09-13 04:04:55,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 12 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 04:04:55,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:55,251 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2024-09-13 04:04:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 04:04:55,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:55,252 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:04:55,267 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 04:04:55,456 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:55,457 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:55,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash -546904304, now seen corresponding path program 1 times [2024-09-13 04:04:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366883876] [2024-09-13 04:04:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:04:55,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673407450] [2024-09-13 04:04:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:55,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:55,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:55,488 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) [2024-09-13 04:04:55,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 04:04:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:55,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-13 04:04:55,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:04:55,612 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 [2024-09-13 04:04:55,616 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 11 treesize of output 7 [2024-09-13 04:04:55,621 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 [2024-09-13 04:04:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 04:04:55,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:04:56,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366883876] [2024-09-13 04:04:56,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:04:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673407450] [2024-09-13 04:04:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673407450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:56,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:04:56,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 04:04:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713570554] [2024-09-13 04:04:56,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:04:56,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 04:04:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 04:04:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-13 04:04:56,262 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 04:04:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:04:57,035 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2024-09-13 04:04:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 04:04:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-09-13 04:04:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:04:57,037 INFO L225 Difference]: With dead ends: 141 [2024-09-13 04:04:57,038 INFO L226 Difference]: Without dead ends: 139 [2024-09-13 04:04:57,038 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-13 04:04:57,039 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 52 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 04:04:57,041 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 219 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 04:04:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-13 04:04:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-09-13 04:04:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 86 states have internal predecessors, (92), 34 states have call successors, (34), 16 states have call predecessors, (34), 20 states have return successors, (41), 34 states have call predecessors, (41), 31 states have call successors, (41) [2024-09-13 04:04:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2024-09-13 04:04:57,106 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 36 [2024-09-13 04:04:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:04:57,107 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2024-09-13 04:04:57,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 04:04:57,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2024-09-13 04:04:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 04:04:57,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:04:57,108 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, 1, 1] [2024-09-13 04:04:57,122 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 04:04:57,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:57,309 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:04:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:04:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash -274231684, now seen corresponding path program 1 times [2024-09-13 04:04:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:04:57,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568462374] [2024-09-13 04:04:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:57,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:04:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:04:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446844212] [2024-09-13 04:04:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:04:57,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:04:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:04:57,332 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) [2024-09-13 04:04:57,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 04:04:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:04:57,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-13 04:04:57,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:04:57,789 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 [2024-09-13 04:04:57,795 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 [2024-09-13 04:04:57,802 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 [2024-09-13 04:04:57,809 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 [2024-09-13 04:04:57,966 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 [2024-09-13 04:04:58,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:04:58,232 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 30 treesize of output 30 [2024-09-13 04:04:58,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:04:58,242 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 31 treesize of output 31 [2024-09-13 04:04:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 04:04:58,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:04:58,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:04:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568462374] [2024-09-13 04:04:58,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:04:58,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446844212] [2024-09-13 04:04:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446844212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:04:58,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:04:58,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-13 04:04:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126212470] [2024-09-13 04:04:58,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:04:58,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 04:04:58,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:04:58,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 04:04:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-13 04:04:58,705 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 04:05:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:05:00,178 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2024-09-13 04:05:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 04:05:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-13 04:05:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:05:00,181 INFO L225 Difference]: With dead ends: 181 [2024-09-13 04:05:00,181 INFO L226 Difference]: Without dead ends: 179 [2024-09-13 04:05:00,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-09-13 04:05:00,182 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 44 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 32 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 04:05:00,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 324 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 739 Invalid, 10 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 04:05:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-13 04:05:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2024-09-13 04:05:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 109 states have internal predecessors, (117), 44 states have call successors, (44), 20 states have call predecessors, (44), 25 states have return successors, (52), 45 states have call predecessors, (52), 40 states have call successors, (52) [2024-09-13 04:05:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2024-09-13 04:05:00,270 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 36 [2024-09-13 04:05:00,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:05:00,270 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2024-09-13 04:05:00,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 04:05:00,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2024-09-13 04:05:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 04:05:00,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:05:00,274 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:05:00,286 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 04:05:00,475 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 04:05:00,475 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:05:00,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:00,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2107888845, now seen corresponding path program 3 times [2024-09-13 04:05:00,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:05:00,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839213595] [2024-09-13 04:05:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:00,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:05:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:01,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:05:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:01,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:05:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:01,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:05:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:02,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:05:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:02,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:05:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:02,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:05:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 04:05:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:05:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839213595] [2024-09-13 04:05:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839213595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:05:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101733041] [2024-09-13 04:05:03,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 04:05:03,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:03,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:05:03,094 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) [2024-09-13 04:05:03,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 04:05:03,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 04:05:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:05:03,393 WARN L260 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-09-13 04:05:03,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:05:03,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:05:03,470 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 [2024-09-13 04:05:03,475 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 [2024-09-13 04:05:03,482 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 [2024-09-13 04:05:04,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:05:04,439 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 40 treesize of output 40 [2024-09-13 04:05:04,454 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 [2024-09-13 04:05:04,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 04:05:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 04:05:04,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:05:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101733041] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:05:06,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:05:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2024-09-13 04:05:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890598485] [2024-09-13 04:05:06,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:05:06,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 04:05:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:05:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 04:05:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1948, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 04:05:06,268 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-13 04:05:19,665 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] [2024-09-13 04:05:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:05:26,074 INFO L93 Difference]: Finished difference Result 230 states and 285 transitions. [2024-09-13 04:05:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-13 04:05:26,075 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 42 [2024-09-13 04:05:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:05:26,077 INFO L225 Difference]: With dead ends: 230 [2024-09-13 04:05:26,077 INFO L226 Difference]: Without dead ends: 228 [2024-09-13 04:05:26,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=653, Invalid=7001, Unknown=2, NotChecked=0, Total=7656 [2024-09-13 04:05:26,080 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 186 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 3395 mSolverCounterSat, 135 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3395 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2024-09-13 04:05:26,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 726 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3395 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2024-09-13 04:05:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-09-13 04:05:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2024-09-13 04:05:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 111 states have (on average 1.117117117117117) internal successors, (124), 116 states have internal predecessors, (124), 45 states have call successors, (45), 21 states have call predecessors, (45), 28 states have return successors, (55), 47 states have call predecessors, (55), 41 states have call successors, (55) [2024-09-13 04:05:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 224 transitions. [2024-09-13 04:05:26,163 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 224 transitions. Word has length 42 [2024-09-13 04:05:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:05:26,164 INFO L474 AbstractCegarLoop]: Abstraction has 185 states and 224 transitions. [2024-09-13 04:05:26,164 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 31 states have internal predecessors, (39), 13 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-13 04:05:26,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 224 transitions. [2024-09-13 04:05:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 04:05:26,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:05:26,166 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:05:26,180 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 04:05:26,370 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:26,371 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:05:26,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 21325385, now seen corresponding path program 1 times [2024-09-13 04:05:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:05:26,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96251151] [2024-09-13 04:05:26,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:26,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:05:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:05:26,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056690676] [2024-09-13 04:05:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:26,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:05:26,403 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) [2024-09-13 04:05:26,405 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 04:05:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:26,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-13 04:05:26,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:05:26,590 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 [2024-09-13 04:05:26,594 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 [2024-09-13 04:05:26,599 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 [2024-09-13 04:05:26,604 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 [2024-09-13 04:05:26,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2024-09-13 04:05:26,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-09-13 04:05:26,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2024-09-13 04:05:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 04:05:27,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:05:27,241 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 144 treesize of output 116 [2024-09-13 04:05:47,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:05:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96251151] [2024-09-13 04:05:47,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:05:47,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056690676] [2024-09-13 04:05:47,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056690676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:05:47,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:05:47,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-13 04:05:47,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953476748] [2024-09-13 04:05:47,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:05:47,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 04:05:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:05:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 04:05:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=81, Unknown=5, NotChecked=0, Total=110 [2024-09-13 04:05:47,678 INFO L87 Difference]: Start difference. First operand 185 states and 224 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 04:05:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:05:48,204 INFO L93 Difference]: Finished difference Result 228 states and 273 transitions. [2024-09-13 04:05:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 04:05:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2024-09-13 04:05:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:05:48,206 INFO L225 Difference]: With dead ends: 228 [2024-09-13 04:05:48,207 INFO L226 Difference]: Without dead ends: 226 [2024-09-13 04:05:48,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=49, Invalid=156, Unknown=5, NotChecked=0, Total=210 [2024-09-13 04:05:48,207 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 04:05:48,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 217 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 04:05:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-13 04:05:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2024-09-13 04:05:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 141 states have internal predecessors, (151), 54 states have call successors, (54), 26 states have call predecessors, (54), 33 states have return successors, (63), 56 states have call predecessors, (63), 49 states have call successors, (63) [2024-09-13 04:05:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 268 transitions. [2024-09-13 04:05:48,306 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 268 transitions. Word has length 42 [2024-09-13 04:05:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:05:48,306 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 268 transitions. [2024-09-13 04:05:48,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 04:05:48,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 268 transitions. [2024-09-13 04:05:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 04:05:48,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:05:48,309 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:05:48,329 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 04:05:48,509 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:48,509 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:05:48,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1606878135, now seen corresponding path program 1 times [2024-09-13 04:05:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:05:48,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562819510] [2024-09-13 04:05:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:05:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:05:48,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808427217] [2024-09-13 04:05:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:48,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:48,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:05:48,536 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) [2024-09-13 04:05:48,539 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 04:05:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:05:48,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-13 04:05:48,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:05:48,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:05:48,733 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 [2024-09-13 04:05:48,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:05:48,744 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 [2024-09-13 04:05:49,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:05:49,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:05:49,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:05:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 04:05:49,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:05:49,258 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 87 treesize of output 79 [2024-09-13 04:05:54,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:05:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562819510] [2024-09-13 04:05:54,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:05:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808427217] [2024-09-13 04:05:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808427217] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:05:54,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:05:54,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-13 04:05:54,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924650091] [2024-09-13 04:05:54,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:05:54,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 04:05:54,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:05:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 04:05:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=85, Unknown=1, NotChecked=0, Total=110 [2024-09-13 04:05:54,318 INFO L87 Difference]: Start difference. First operand 224 states and 268 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 04:05:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:05:54,976 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2024-09-13 04:05:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 04:05:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-13 04:05:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:05:54,978 INFO L225 Difference]: With dead ends: 236 [2024-09-13 04:05:54,978 INFO L226 Difference]: Without dead ends: 234 [2024-09-13 04:05:54,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=49, Invalid=160, Unknown=1, NotChecked=0, Total=210 [2024-09-13 04:05:54,979 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 04:05:54,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 237 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 04:05:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-09-13 04:05:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2024-09-13 04:05:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 147 states have internal predecessors, (157), 54 states have call successors, (54), 28 states have call predecessors, (54), 35 states have return successors, (63), 56 states have call predecessors, (63), 49 states have call successors, (63) [2024-09-13 04:05:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 274 transitions. [2024-09-13 04:05:55,067 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 274 transitions. Word has length 42 [2024-09-13 04:05:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:05:55,067 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 274 transitions. [2024-09-13 04:05:55,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 04:05:55,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:55,068 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 274 transitions. [2024-09-13 04:05:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 04:05:55,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:05:55,069 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:05:55,087 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 04:05:55,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:55,270 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:05:55,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:05:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1240630883, now seen corresponding path program 2 times [2024-09-13 04:05:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:05:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844323882] [2024-09-13 04:05:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:05:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:05:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:05:55,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225586913] [2024-09-13 04:05:55,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:05:55,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:05:55,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:05:55,291 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) [2024-09-13 04:05:55,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 04:05:55,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:05:55,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:05:55,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-13 04:05:55,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:05:55,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:05:55,565 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 [2024-09-13 04:05:55,569 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 [2024-09-13 04:05:55,575 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 [2024-09-13 04:05:55,825 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 [2024-09-13 04:05:56,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:05:56,201 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 30 treesize of output 26 [2024-09-13 04:05:56,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:05:56,215 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 31 treesize of output 23 [2024-09-13 04:05:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 04:05:56,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:06:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:06:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844323882] [2024-09-13 04:06:47,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:06:47,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225586913] [2024-09-13 04:06:47,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225586913] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:06:47,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:06:47,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 04:06:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237847820] [2024-09-13 04:06:47,061 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:06:47,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 04:06:47,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:06:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 04:06:47,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=620, Unknown=10, NotChecked=0, Total=702 [2024-09-13 04:06:47,063 INFO L87 Difference]: Start difference. First operand 232 states and 274 transitions. Second operand has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 04:06:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:06:53,505 INFO L93 Difference]: Finished difference Result 288 states and 335 transitions. [2024-09-13 04:06:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 04:06:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-09-13 04:06:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:06:53,507 INFO L225 Difference]: With dead ends: 288 [2024-09-13 04:06:53,507 INFO L226 Difference]: Without dead ends: 286 [2024-09-13 04:06:53,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=142, Invalid=1038, Unknown=10, NotChecked=0, Total=1190 [2024-09-13 04:06:53,509 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 58 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 45 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:06:53,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 346 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 934 Invalid, 12 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 04:06:53,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-09-13 04:06:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 232. [2024-09-13 04:06:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 142 states have (on average 1.1056338028169015) internal successors, (157), 147 states have internal predecessors, (157), 54 states have call successors, (54), 28 states have call predecessors, (54), 35 states have return successors, (63), 57 states have call predecessors, (63), 49 states have call successors, (63) [2024-09-13 04:06:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 274 transitions. [2024-09-13 04:06:53,620 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 274 transitions. Word has length 42 [2024-09-13 04:06:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:06:53,621 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 274 transitions. [2024-09-13 04:06:53,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 8 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 04:06:53,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:06:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 274 transitions. [2024-09-13 04:06:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 04:06:53,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:06:53,623 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:06:53,633 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 04:06:53,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 04:06:53,824 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:06:53,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:06:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash -211633676, now seen corresponding path program 4 times [2024-09-13 04:06:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:06:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469876847] [2024-09-13 04:06:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:06:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:06:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:06:54,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:06:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:06:54,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:06:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:06:54,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:06:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:06:58,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:06:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:06:59,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:06:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:07:00,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:07:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:07:00,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:07:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:07:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 04:07:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:07:00,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469876847] [2024-09-13 04:07:00,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469876847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:07:00,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891084399] [2024-09-13 04:07:00,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 04:07:00,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:07:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:07:00,973 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:07:00,973 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 04:07:01,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 04:07:01,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:07:01,099 WARN L260 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-13 04:07:01,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:07:01,113 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 [2024-09-13 04:07:01,291 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 [2024-09-13 04:07:01,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:07:01,303 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 [2024-09-13 04:07:02,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:07:02,758 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 40 treesize of output 36 [2024-09-13 04:07:02,781 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 [2024-09-13 04:07:03,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 04:07:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 04:07:03,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:07:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891084399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:07:06,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:07:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 45 [2024-09-13 04:07:06,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459614739] [2024-09-13 04:07:06,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:07:06,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-13 04:07:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:07:06,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-13 04:07:06,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2508, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 04:07:06,007 INFO L87 Difference]: Start difference. First operand 232 states and 274 transitions. Second operand has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 04:07:21,280 WARN L293 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 114 DAG size of output: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 04:07:34,766 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] [2024-09-13 04:07:38,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:03,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:07,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:11,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:15,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:39,967 WARN L293 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 116 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 04:08:43,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:08:48,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:09:09,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:09:13,174 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] [2024-09-13 04:09:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:09:13,549 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-09-13 04:09:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-09-13 04:09:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) Word has length 48 [2024-09-13 04:09:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:09:13,552 INFO L225 Difference]: With dead ends: 284 [2024-09-13 04:09:13,552 INFO L226 Difference]: Without dead ends: 282 [2024-09-13 04:09:13,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=596, Invalid=8895, Unknown=15, NotChecked=0, Total=9506 [2024-09-13 04:09:13,556 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 171 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 3332 mSolverCounterSat, 153 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 3495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3332 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2024-09-13 04:09:13,556 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 661 Invalid, 3495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3332 Invalid, 10 Unknown, 0 Unchecked, 45.3s Time] [2024-09-13 04:09:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-09-13 04:09:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 234. [2024-09-13 04:09:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 148 states have internal predecessors, (158), 54 states have call successors, (54), 28 states have call predecessors, (54), 36 states have return successors, (65), 58 states have call predecessors, (65), 49 states have call successors, (65) [2024-09-13 04:09:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 277 transitions. [2024-09-13 04:09:13,706 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 277 transitions. Word has length 48 [2024-09-13 04:09:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:09:13,707 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 277 transitions. [2024-09-13 04:09:13,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 33 states have (on average 1.393939393939394) internal successors, (46), 37 states have internal predecessors, (46), 14 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 04:09:13,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:09:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 277 transitions. [2024-09-13 04:09:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 04:09:13,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:09:13,709 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:09:13,724 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 04:09:13,910 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-13 04:09:13,910 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:09:13,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:09:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2124398875, now seen corresponding path program 5 times [2024-09-13 04:09:13,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:09:13,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050897539] [2024-09-13 04:09:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:09:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:09:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:09:15,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:09:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:09:15,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:09:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:09:15,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:09:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:37,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:11:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:41,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:11:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:42,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:11:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:42,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:11:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:43,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 04:11:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:11:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 04:11:43,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:11:43,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050897539] [2024-09-13 04:11:43,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050897539] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:11:43,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842923614] [2024-09-13 04:11:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 04:11:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:11:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:11:43,424 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:11:43,425 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 04:11:43,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 04:11:43,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:11:43,574 WARN L260 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-13 04:11:43,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:11:43,586 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 [2024-09-13 04:11:43,642 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 [2024-09-13 04:11:43,647 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 [2024-09-13 04:11:43,653 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 [2024-09-13 04:11:45,579 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 [2024-09-13 04:11:45,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:11:45,603 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 32 treesize of output 28 [2024-09-13 04:11:46,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-13 04:11:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-13 04:11:46,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:11:49,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842923614] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:11:49,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:11:49,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 47 [2024-09-13 04:11:49,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437543361] [2024-09-13 04:11:49,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:11:49,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 04:11:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:11:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 04:11:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 04:11:49,637 INFO L87 Difference]: Start difference. First operand 234 states and 277 transitions. Second operand has 47 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 39 states have internal predecessors, (47), 15 states have call successors, (16), 7 states have call predecessors, (16), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-09-13 04:12:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:12:14,720 INFO L93 Difference]: Finished difference Result 325 states and 389 transitions. [2024-09-13 04:12:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-09-13 04:12:14,721 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 39 states have internal predecessors, (47), 15 states have call successors, (16), 7 states have call predecessors, (16), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2024-09-13 04:12:14,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:12:14,722 INFO L225 Difference]: With dead ends: 325 [2024-09-13 04:12:14,723 INFO L226 Difference]: Without dead ends: 323 [2024-09-13 04:12:14,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1248, Invalid=14003, Unknown=1, NotChecked=0, Total=15252 [2024-09-13 04:12:14,726 INFO L434 NwaCegarLoop]: 67 mSDtfsCounter, 336 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 4906 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 5190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 4906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-13 04:12:14,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 1195 Invalid, 5190 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [284 Valid, 4906 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-09-13 04:12:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-09-13 04:12:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 250. [2024-09-13 04:12:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 153 states have (on average 1.1111111111111112) internal successors, (170), 160 states have internal predecessors, (170), 56 states have call successors, (56), 30 states have call predecessors, (56), 40 states have return successors, (68), 61 states have call predecessors, (68), 51 states have call successors, (68) [2024-09-13 04:12:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 294 transitions. [2024-09-13 04:12:14,856 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 294 transitions. Word has length 54 [2024-09-13 04:12:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:12:14,856 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 294 transitions. [2024-09-13 04:12:14,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 39 states have internal predecessors, (47), 15 states have call successors, (16), 7 states have call predecessors, (16), 13 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2024-09-13 04:12:14,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 294 transitions. [2024-09-13 04:12:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 04:12:14,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:12:14,858 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:12:14,873 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 04:12:15,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:12:15,059 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:12:15,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -959275072, now seen corresponding path program 1 times [2024-09-13 04:12:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:12:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782163976] [2024-09-13 04:12:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:12:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:12:15,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827037168] [2024-09-13 04:12:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:15,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:12:15,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:12:15,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:12:15,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 04:12:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:15,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-09-13 04:12:15,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:12:15,381 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 [2024-09-13 04:12:15,390 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 [2024-09-13 04:12:15,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:12:15,404 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 [2024-09-13 04:12:15,414 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 [2024-09-13 04:12:16,096 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 50 treesize of output 22 [2024-09-13 04:12:16,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-13 04:12:16,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-09-13 04:12:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 04:12:16,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:12:16,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:12:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782163976] [2024-09-13 04:12:16,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:12:16,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827037168] [2024-09-13 04:12:16,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827037168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:12:16,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:12:16,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 04:12:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5266632] [2024-09-13 04:12:16,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:12:16,422 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 04:12:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:12:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 04:12:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-13 04:12:16,423 INFO L87 Difference]: Start difference. First operand 250 states and 294 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 04:12:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:12:17,617 INFO L93 Difference]: Finished difference Result 262 states and 304 transitions. [2024-09-13 04:12:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 04:12:17,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-09-13 04:12:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:12:17,620 INFO L225 Difference]: With dead ends: 262 [2024-09-13 04:12:17,620 INFO L226 Difference]: Without dead ends: 260 [2024-09-13 04:12:17,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-09-13 04:12:17,621 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 04:12:17,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 191 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 04:12:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-13 04:12:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 254. [2024-09-13 04:12:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 156 states have (on average 1.108974358974359) internal successors, (173), 163 states have internal predecessors, (173), 56 states have call successors, (56), 31 states have call predecessors, (56), 41 states have return successors, (68), 61 states have call predecessors, (68), 51 states have call successors, (68) [2024-09-13 04:12:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2024-09-13 04:12:17,848 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 48 [2024-09-13 04:12:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:12:17,851 INFO L474 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2024-09-13 04:12:17,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 04:12:17,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2024-09-13 04:12:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 04:12:17,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:12:17,852 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:12:17,872 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 04:12:18,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 04:12:18,053 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:12:18,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash 776519754, now seen corresponding path program 3 times [2024-09-13 04:12:18,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:12:18,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690509375] [2024-09-13 04:12:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:18,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:12:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:12:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909606225] [2024-09-13 04:12:18,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 04:12:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:12:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:12:18,078 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:12:18,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 04:12:18,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 04:12:18,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:12:18,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-13 04:12:18,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:12:18,286 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 [2024-09-13 04:12:18,318 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 [2024-09-13 04:12:18,327 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 [2024-09-13 04:12:18,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:12:18,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:12:18,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-13 04:12:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-13 04:12:18,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:12:18,769 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 [2024-09-13 04:12:18,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:12:18,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690509375] [2024-09-13 04:12:18,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:12:18,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909606225] [2024-09-13 04:12:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909606225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:12:18,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:12:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 04:12:18,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117214080] [2024-09-13 04:12:18,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:12:18,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 04:12:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:12:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 04:12:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-13 04:12:18,839 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:12:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:12:19,584 INFO L93 Difference]: Finished difference Result 299 states and 359 transitions. [2024-09-13 04:12:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 04:12:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2024-09-13 04:12:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:12:19,587 INFO L225 Difference]: With dead ends: 299 [2024-09-13 04:12:19,587 INFO L226 Difference]: Without dead ends: 297 [2024-09-13 04:12:19,587 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-09-13 04:12:19,588 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 04:12:19,588 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 247 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 04:12:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-09-13 04:12:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2024-09-13 04:12:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 180 states have (on average 1.1111111111111112) internal successors, (200), 188 states have internal predecessors, (200), 66 states have call successors, (66), 35 states have call predecessors, (66), 46 states have return successors, (83), 71 states have call predecessors, (83), 60 states have call successors, (83) [2024-09-13 04:12:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 349 transitions. [2024-09-13 04:12:19,794 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 349 transitions. Word has length 48 [2024-09-13 04:12:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:12:19,795 INFO L474 AbstractCegarLoop]: Abstraction has 293 states and 349 transitions. [2024-09-13 04:12:19,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:12:19,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 349 transitions. [2024-09-13 04:12:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 04:12:19,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:12:19,796 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:12:19,804 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 04:12:19,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 04:12:19,997 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:12:19,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1281191157, now seen corresponding path program 1 times [2024-09-13 04:12:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:12:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811381413] [2024-09-13 04:12:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:12:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:12:20,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187267268] [2024-09-13 04:12:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:20,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:12:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:12:20,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:12:20,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 04:12:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:20,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 04:12:20,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:12:20,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:12:20,237 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 [2024-09-13 04:12:24,258 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_main_~#r~0.base_BEFORE_CALL_31| Int) (|v_main_~#n~0.offset_BEFORE_CALL_30| Int) (|v_main_~#r~0.offset_BEFORE_CALL_36| Int) (|v_main_~#n~0.base_BEFORE_CALL_26| Int)) (= (select (select |c_#memory_int#3| |v_main_~#r~0.base_BEFORE_CALL_31|) |v_main_~#r~0.offset_BEFORE_CALL_36|) (select (select |c_#memory_int#2| |v_main_~#n~0.base_BEFORE_CALL_26|) |v_main_~#n~0.offset_BEFORE_CALL_30|))) is different from true [2024-09-13 04:12:28,324 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_15 Int) (v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_15 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_15 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_15 Int)) (= (select (select |c_#memory_int#3| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_15) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_15) (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_15) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_15))) is different from true [2024-09-13 04:12:32,447 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_16 Int) (v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_16 Int) (v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_16 Int) (v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_16 Int)) (= (select (select |c_#memory_int#2| v_func_to_recursive_line_37_to_53_0_~n.base_BEFORE_CALL_16) v_func_to_recursive_line_37_to_53_0_~n.offset_BEFORE_CALL_16) (select (select |c_#memory_int#3| v_func_to_recursive_line_37_to_53_0_~r.base_BEFORE_CALL_16) v_func_to_recursive_line_37_to_53_0_~r.offset_BEFORE_CALL_16))) is different from true [2024-09-13 04:13:05,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:13:05,169 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 93 treesize of output 81 [2024-09-13 04:13:05,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:13:05,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 115 [2024-09-13 04:13:05,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:13:05,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 125 [2024-09-13 04:13:27,842 WARN L293 SmtUtils]: Spent 22.59s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-09-13 04:13:27,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:13:27,842 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 49 [2024-09-13 04:13:33,881 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 04:13:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 22 not checked. [2024-09-13 04:13:42,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:13:51,495 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 80 treesize of output 64 [2024-09-13 04:13:51,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2024-09-13 04:13:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 04:13:51,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:13:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811381413] [2024-09-13 04:13:51,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:13:51,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187267268] [2024-09-13 04:13:51,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187267268] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 04:13:51,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:13:51,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 22 [2024-09-13 04:13:51,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243834792] [2024-09-13 04:13:51,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:13:51,524 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 04:13:51,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:13:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 04:13:51,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=287, Unknown=8, NotChecked=108, Total=462 [2024-09-13 04:13:51,525 INFO L87 Difference]: Start difference. First operand 293 states and 349 transitions. Second operand has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-13 04:13:55,555 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] [2024-09-13 04:14:03,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:09,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:11,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:14:15,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:19,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:23,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:27,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:31,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:37,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:14:57,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:15:01,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:15:17,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:15:21,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:15:25,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:15:46,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:15:50,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:15:54,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:15:59,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:16:01,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-09-13 04:16:09,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2024-09-13 04:16:14,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:16:15,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:16:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:16:15,798 INFO L93 Difference]: Finished difference Result 323 states and 381 transitions. [2024-09-13 04:16:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 04:16:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 54 [2024-09-13 04:16:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:16:15,800 INFO L225 Difference]: With dead ends: 323 [2024-09-13 04:16:15,801 INFO L226 Difference]: Without dead ends: 321 [2024-09-13 04:16:15,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 109.3s TimeCoverageRelationStatistics Valid=215, Invalid=1110, Unknown=19, NotChecked=216, Total=1560 [2024-09-13 04:16:15,802 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 77 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 50 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 91.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:16:15,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 267 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 471 Invalid, 19 Unknown, 391 Unchecked, 91.5s Time] [2024-09-13 04:16:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-09-13 04:16:16,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2024-09-13 04:16:16,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 198 states have (on average 1.106060606060606) internal successors, (219), 206 states have internal predecessors, (219), 66 states have call successors, (66), 41 states have call predecessors, (66), 52 states have return successors, (83), 71 states have call predecessors, (83), 60 states have call successors, (83) [2024-09-13 04:16:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 368 transitions. [2024-09-13 04:16:16,039 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 368 transitions. Word has length 54 [2024-09-13 04:16:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:16:16,039 INFO L474 AbstractCegarLoop]: Abstraction has 317 states and 368 transitions. [2024-09-13 04:16:16,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 10 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-13 04:16:16,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 368 transitions. [2024-09-13 04:16:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 04:16:16,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:16:16,041 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:16:16,056 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 04:16:16,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 04:16:16,241 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:16:16,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1553860121, now seen corresponding path program 1 times [2024-09-13 04:16:16,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:16:16,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875462201] [2024-09-13 04:16:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:16:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:16:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:16:16,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820805353] [2024-09-13 04:16:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:16:16,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:16:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:16:16,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:16:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 04:16:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:16:16,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-09-13 04:16:16,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:16:16,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:16:16,504 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 [2024-09-13 04:16:16,507 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 [2024-09-13 04:16:16,512 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 [2024-09-13 04:16:16,517 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 [2024-09-13 04:16:16,731 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 [2024-09-13 04:16:17,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:16:17,470 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 30 treesize of output 30 [2024-09-13 04:16:17,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:16:17,482 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 38 treesize of output 34 [2024-09-13 04:16:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-13 04:16:17,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:16:18,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:16:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875462201] [2024-09-13 04:16:18,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:16:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820805353] [2024-09-13 04:16:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820805353] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:16:18,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:16:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-13 04:16:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888757718] [2024-09-13 04:16:18,132 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:16:18,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 04:16:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:16:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 04:16:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-09-13 04:16:18,133 INFO L87 Difference]: Start difference. First operand 317 states and 368 transitions. Second operand has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 04:16:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:16:20,127 INFO L93 Difference]: Finished difference Result 383 states and 438 transitions. [2024-09-13 04:16:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 04:16:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-13 04:16:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:16:20,129 INFO L225 Difference]: With dead ends: 383 [2024-09-13 04:16:20,129 INFO L226 Difference]: Without dead ends: 381 [2024-09-13 04:16:20,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-09-13 04:16:20,130 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 29 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 04:16:20,130 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 329 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 753 Invalid, 10 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 04:16:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-09-13 04:16:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 319. [2024-09-13 04:16:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 199 states have (on average 1.1055276381909547) internal successors, (220), 207 states have internal predecessors, (220), 66 states have call successors, (66), 41 states have call predecessors, (66), 53 states have return successors, (84), 72 states have call predecessors, (84), 60 states have call successors, (84) [2024-09-13 04:16:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 370 transitions. [2024-09-13 04:16:20,390 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 370 transitions. Word has length 54 [2024-09-13 04:16:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:16:20,390 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 370 transitions. [2024-09-13 04:16:20,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-13 04:16:20,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:20,390 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 370 transitions. [2024-09-13 04:16:20,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 04:16:20,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:16:20,391 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:16:20,404 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 04:16:20,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 04:16:20,592 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:16:20,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1299159618, now seen corresponding path program 6 times [2024-09-13 04:16:20,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:16:20,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683312785] [2024-09-13 04:16:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:16:20,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:16:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:16:21,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:16:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:16:21,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:16:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:16:21,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:16:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15