./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:14:32,418 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:14:32,487 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:14:32,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:14:32,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:14:32,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:14:32,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:14:32,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:14:32,528 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:14:32,528 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:14:32,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:14:32,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:14:32,531 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:14:32,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:14:32,537 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:14:32,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:14:32,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:14:32,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:14:32,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:14:32,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:14:32,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:14:32,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:14:32,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:14:32,542 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:14:32,543 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:14:32,543 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:14:32,543 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:14:32,543 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:14:32,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:14:32,544 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:14:32,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:14:32,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:14:32,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:32,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:14:32,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:14:32,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:14:32,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:14:32,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:14:32,547 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:14:32,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:14:32,548 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:14:32,548 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:14:32,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0464cc7a685168b5fc1a1b0dd8da6141b4b98c7c538345750bda8185cd005644 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:14:32,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:14:32,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:14:32,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:14:32,873 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:14:32,873 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:14:32,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-25 00:14:34,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:14:34,514 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:14:34,515 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c [2024-09-25 00:14:34,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1d6c56d76/ea7425f79c3f465fb3eb59f7cd23d8f9/FLAGb877ac560 [2024-09-25 00:14:34,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1d6c56d76/ea7425f79c3f465fb3eb59f7cd23d8f9 [2024-09-25 00:14:34,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:14:34,546 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:14:34,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:34,547 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:14:34,551 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:14:34,552 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,553 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4c895a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34, skipping insertion in model container [2024-09-25 00:14:34,553 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,578 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:14:34,744 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-25 00:14:34,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:34,822 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:14:34,836 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_dijkstra-u.c[1076,1089] [2024-09-25 00:14:34,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:14:34,892 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:14:34,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34 WrapperNode [2024-09-25 00:14:34,893 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:14:34,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:34,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:14:34,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:14:34,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,920 INFO L138 Inliner]: procedures = 17, calls = 173, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:14:34,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:14:34,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:14:34,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:14:34,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:14:34,934 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,938 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,980 INFO L175 MemorySlicer]: Split 139 memory accesses to 6 slices as follows [29, 2, 35, 30, 21, 22]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0, 0, 0]. The 11 writes are split as follows [3, 0, 3, 2, 1, 2]. [2024-09-25 00:14:34,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,995 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:34,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:35,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:35,006 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:14:35,011 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:14:35,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:14:35,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:14:35,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (1/1) ... [2024-09-25 00:14:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:14:35,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:35,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:14:35,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:14:35,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:14:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_29_to_33_0 [2024-09-25 00:14:35,105 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_29_to_33_0 [2024-09-25 00:14:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 00:14:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 00:14:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:14:35,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:14:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:14:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-25 00:14:35,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-25 00:14:35,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:14:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_53_0 [2024-09-25 00:14:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_53_0 [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:14:35,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-25 00:14:35,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-25 00:14:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-25 00:14:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-25 00:14:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-25 00:14:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-25 00:14:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 00:14:35,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 00:14:35,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-25 00:14:35,274 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:14:35,276 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:14:35,762 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-25 00:14:35,762 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:14:35,783 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:14:35,783 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 00:14:35,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:35 BoogieIcfgContainer [2024-09-25 00:14:35,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:14:35,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:14:35,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:14:35,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:14:35,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:14:34" (1/3) ... [2024-09-25 00:14:35,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d37262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:35, skipping insertion in model container [2024-09-25 00:14:35,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:14:34" (2/3) ... [2024-09-25 00:14:35,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d37262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:14:35, skipping insertion in model container [2024-09-25 00:14:35,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:14:35" (3/3) ... [2024-09-25 00:14:35,793 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_dijkstra-u.c [2024-09-25 00:14:35,809 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:14:35,809 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:14:35,866 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:14:35,873 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;@74a59440, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:14:35,874 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:14:35,877 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) [2024-09-25 00:14:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-25 00:14:35,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:35,885 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] [2024-09-25 00:14:35,886 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:35,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -795461761, now seen corresponding path program 1 times [2024-09-25 00:14:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365859144] [2024-09-25 00:14:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:14:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:36,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365859144] [2024-09-25 00:14:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365859144] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:36,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:36,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 00:14:36,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434045236] [2024-09-25 00:14:36,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:36,153 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 00:14:36,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 00:14:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 00:14:36,186 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) [2024-09-25 00:14:36,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:36,392 INFO L93 Difference]: Finished difference Result 104 states and 150 transitions. [2024-09-25 00:14:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 00:14:36,395 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 [2024-09-25 00:14:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:36,404 INFO L225 Difference]: With dead ends: 104 [2024-09-25 00:14:36,404 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 00:14:36,408 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 [2024-09-25 00:14:36,411 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-25 00:14:36,412 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] [2024-09-25 00:14:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 00:14:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-09-25 00:14:36,450 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) [2024-09-25 00:14:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-09-25 00:14:36,454 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 23 [2024-09-25 00:14:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:36,456 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-09-25 00:14:36,456 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) [2024-09-25 00:14:36,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-09-25 00:14:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-25 00:14:36,462 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:36,462 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] [2024-09-25 00:14:36,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:14:36,462 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:36,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1335693656, now seen corresponding path program 1 times [2024-09-25 00:14:36,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:36,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042810820] [2024-09-25 00:14:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:36,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:37,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:37,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:37,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:14:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:38,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:38,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042810820] [2024-09-25 00:14:38,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042810820] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:14:38,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:14:38,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-09-25 00:14:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346648775] [2024-09-25 00:14:38,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:14:38,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 00:14:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 00:14:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-09-25 00:14:38,029 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) [2024-09-25 00:14:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:38,995 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-25 00:14:38,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:14:38,996 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 [2024-09-25 00:14:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:38,998 INFO L225 Difference]: With dead ends: 83 [2024-09-25 00:14:38,998 INFO L226 Difference]: Without dead ends: 81 [2024-09-25 00:14:39,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:14:39,003 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:39,004 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 165 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-25 00:14:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-25 00:14:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2024-09-25 00:14:39,034 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) [2024-09-25 00:14:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2024-09-25 00:14:39,039 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 24 [2024-09-25 00:14:39,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:39,040 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2024-09-25 00:14:39,040 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) [2024-09-25 00:14:39,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2024-09-25 00:14:39,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 00:14:39,045 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:39,045 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] [2024-09-25 00:14:39,046 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 00:14:39,046 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:39,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1872287595, now seen corresponding path program 1 times [2024-09-25 00:14:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:39,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502269609] [2024-09-25 00:14:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:14:39,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557712142] [2024-09-25 00:14:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:39,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:39,097 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:14:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:39,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-25 00:14:39,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:39,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:39,381 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 11 treesize of output 7 [2024-09-25 00:14:39,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:14:39,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 00:14:39,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:14:39,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-25 00:14:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:14:39,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502269609] [2024-09-25 00:14:39,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:14:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557712142] [2024-09-25 00:14:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557712142] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:39,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:14:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-25 00:14:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364216238] [2024-09-25 00:14:39,972 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:39,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 00:14:39,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:39,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 00:14:39,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-25 00:14:39,974 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:14:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:40,697 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2024-09-25 00:14:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:14:40,697 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-25 00:14:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:40,699 INFO L225 Difference]: With dead ends: 122 [2024-09-25 00:14:40,700 INFO L226 Difference]: Without dead ends: 120 [2024-09-25 00:14:40,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-25 00:14:40,701 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:40,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 231 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 00:14:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-25 00:14:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2024-09-25 00:14:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.125) internal successors, (72), 68 states have internal predecessors, (72), 33 states have call successors, (33), 11 states have call predecessors, (33), 13 states have return successors, (39), 31 states have call predecessors, (39), 30 states have call successors, (39) [2024-09-25 00:14:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2024-09-25 00:14:40,732 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 30 [2024-09-25 00:14:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:40,733 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2024-09-25 00:14:40,733 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:14:40,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2024-09-25 00:14:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 00:14:40,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:40,735 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] [2024-09-25 00:14:40,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:14:40,935 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 [2024-09-25 00:14:40,936 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:40,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash 687714431, now seen corresponding path program 1 times [2024-09-25 00:14:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23541887] [2024-09-25 00:14:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:41,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:41,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:41,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:14:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:42,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:14:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:14:42,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:42,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23541887] [2024-09-25 00:14:42,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23541887] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147402175] [2024-09-25 00:14:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:42,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:42,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:42,532 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:42,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:14:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:42,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-25 00:14:42,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:42,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:42,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:42,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:42,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:14:43,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:14:43,275 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:43,276 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 32 [2024-09-25 00:14:43,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 00:14:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:14:43,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:14:44,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147402175] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:44,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:14:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-09-25 00:14:44,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44492689] [2024-09-25 00:14:44,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:14:44,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-25 00:14:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:14:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-25 00:14:44,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1162, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:14:44,776 INFO L87 Difference]: Start difference. First operand 111 states and 144 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) [2024-09-25 00:14:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:14:56,516 INFO L93 Difference]: Finished difference Result 161 states and 207 transitions. [2024-09-25 00:14:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-25 00:14:56,517 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 [2024-09-25 00:14:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:14:56,519 INFO L225 Difference]: With dead ends: 161 [2024-09-25 00:14:56,519 INFO L226 Difference]: Without dead ends: 159 [2024-09-25 00:14:56,521 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=295, Invalid=2895, Unknown=2, NotChecked=0, Total=3192 [2024-09-25 00:14:56,523 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:14:56,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 304 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-25 00:14:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-25 00:14:56,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2024-09-25 00:14:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.125) internal successors, (99), 92 states have internal predecessors, (99), 40 states have call successors, (40), 16 states have call predecessors, (40), 19 states have return successors, (50), 39 states have call predecessors, (50), 37 states have call successors, (50) [2024-09-25 00:14:56,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 189 transitions. [2024-09-25 00:14:56,583 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 189 transitions. Word has length 30 [2024-09-25 00:14:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:14:56,583 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 189 transitions. [2024-09-25 00:14:56,584 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) [2024-09-25 00:14:56,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 189 transitions. [2024-09-25 00:14:56,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:14:56,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:14:56,588 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] [2024-09-25 00:14:56,608 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 00:14:56,789 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 [2024-09-25 00:14:56,789 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:14:56,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:14:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1967022502, now seen corresponding path program 2 times [2024-09-25 00:14:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:14:56,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603374907] [2024-09-25 00:14:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:14:56,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:14:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:14:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:14:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:57,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:14:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:58,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:14:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:58,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:14:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:14:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:14:58,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:14:58,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603374907] [2024-09-25 00:14:58,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603374907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:14:58,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011425417] [2024-09-25 00:14:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:14:58,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:14:58,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:14:58,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:14:58,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:14:59,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:14:59,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:14:59,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-25 00:14:59,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:14:59,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:14:59,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:14:59,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:59,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:14:59,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:14:59,928 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 [2024-09-25 00:14:59,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:00,258 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 17 treesize of output 9 [2024-09-25 00:15:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-25 00:15:00,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011425417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:02,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:15:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-09-25 00:15:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317463351] [2024-09-25 00:15:02,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:02,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-25 00:15:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-25 00:15:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1607, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:15:02,025 INFO L87 Difference]: Start difference. First operand 148 states and 189 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) [2024-09-25 00:15:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:11,714 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2024-09-25 00:15:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-25 00:15:11,715 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 [2024-09-25 00:15:11,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:11,718 INFO L225 Difference]: With dead ends: 197 [2024-09-25 00:15:11,720 INFO L226 Difference]: Without dead ends: 195 [2024-09-25 00:15:11,722 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=439, Invalid=4672, Unknown=1, NotChecked=0, Total=5112 [2024-09-25 00:15:11,726 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 121 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:11,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 548 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-25 00:15:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-25 00:15:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 158. [2024-09-25 00:15:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.127659574468085) internal successors, (106), 99 states have internal predecessors, (106), 41 states have call successors, (41), 17 states have call predecessors, (41), 22 states have return successors, (53), 41 states have call predecessors, (53), 38 states have call successors, (53) [2024-09-25 00:15:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2024-09-25 00:15:11,791 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 36 [2024-09-25 00:15:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:11,791 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2024-09-25 00:15:11,791 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) [2024-09-25 00:15:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2024-09-25 00:15:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-25 00:15:11,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:11,793 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] [2024-09-25 00:15:11,812 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:11,997 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 [2024-09-25 00:15:11,998 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:11,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash -546904304, now seen corresponding path program 1 times [2024-09-25 00:15:11,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:11,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723841656] [2024-09-25 00:15:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:11,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:15:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068393976] [2024-09-25 00:15:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:12,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:12,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:12,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:15:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:12,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-09-25 00:15:12,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:12,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:12,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:12,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:12,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:15:12,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:13,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:13,059 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 [2024-09-25 00:15:13,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:13,076 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 51 treesize of output 39 [2024-09-25 00:15:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:15:13,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:41,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:41,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723841656] [2024-09-25 00:15:41,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:15:41,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068393976] [2024-09-25 00:15:41,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068393976] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:41,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:15:41,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 00:15:41,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457589168] [2024-09-25 00:15:41,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:41,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 00:15:41,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 00:15:41,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=253, Unknown=4, NotChecked=0, Total=306 [2024-09-25 00:15:41,675 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-25 00:15:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:15:43,942 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2024-09-25 00:15:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:15:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2024-09-25 00:15:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:15:43,947 INFO L225 Difference]: With dead ends: 176 [2024-09-25 00:15:43,947 INFO L226 Difference]: Without dead ends: 174 [2024-09-25 00:15:43,948 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=198, Invalid=920, Unknown=4, NotChecked=0, Total=1122 [2024-09-25 00:15:43,949 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 00:15:43,949 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 255 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 00:15:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-25 00:15:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2024-09-25 00:15:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 108 states have internal predecessors, (116), 44 states have call successors, (44), 19 states have call predecessors, (44), 24 states have return successors, (55), 44 states have call predecessors, (55), 40 states have call successors, (55) [2024-09-25 00:15:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 215 transitions. [2024-09-25 00:15:44,011 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 215 transitions. Word has length 36 [2024-09-25 00:15:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:15:44,012 INFO L474 AbstractCegarLoop]: Abstraction has 172 states and 215 transitions. [2024-09-25 00:15:44,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-25 00:15:44,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 215 transitions. [2024-09-25 00:15:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 00:15:44,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:15:44,015 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] [2024-09-25 00:15:44,032 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-25 00:15:44,216 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 [2024-09-25 00:15:44,216 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:15:44,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:15:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2107888845, now seen corresponding path program 3 times [2024-09-25 00:15:44,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:15:44,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47423246] [2024-09-25 00:15:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:15:44,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:15:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:15:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:15:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:45,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:15:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:15:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:15:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:46,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:15:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:15:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:15:47,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:15:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47423246] [2024-09-25 00:15:47,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47423246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779077593] [2024-09-25 00:15:47,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:15:47,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:15:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:15:47,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:15:47,248 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:15:47,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:15:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:15:47,410 WARN L260 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-25 00:15:47,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:15:47,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 132 [2024-09-25 00:15:47,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:15:47,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:47,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:15:47,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:15:48,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:15:48,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:15:48,783 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 [2024-09-25 00:15:49,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-25 00:15:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 00:15:49,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:15:51,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779077593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:15:51,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:15:51,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 39 [2024-09-25 00:15:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263809906] [2024-09-25 00:15:51,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:15:51,172 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-25 00:15:51,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:15:51,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-25 00:15:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1950, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:15:51,174 INFO L87 Difference]: Start difference. First operand 172 states and 215 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) [2024-09-25 00:16:11,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:16:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:12,139 INFO L93 Difference]: Finished difference Result 229 states and 290 transitions. [2024-09-25 00:16:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-25 00:16:12,140 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 [2024-09-25 00:16:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:12,142 INFO L225 Difference]: With dead ends: 229 [2024-09-25 00:16:12,142 INFO L226 Difference]: Without dead ends: 227 [2024-09-25 00:16:12,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=651, Invalid=7003, Unknown=2, NotChecked=0, Total=7656 [2024-09-25 00:16:12,145 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 158 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 3782 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 3905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3782 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:12,145 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 788 Invalid, 3905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3782 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2024-09-25 00:16:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-25 00:16:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 180. [2024-09-25 00:16:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 108 states have (on average 1.1296296296296295) internal successors, (122), 114 states have internal predecessors, (122), 45 states have call successors, (45), 20 states have call predecessors, (45), 26 states have return successors, (57), 46 states have call predecessors, (57), 41 states have call successors, (57) [2024-09-25 00:16:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 224 transitions. [2024-09-25 00:16:12,245 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 224 transitions. Word has length 42 [2024-09-25 00:16:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:12,245 INFO L474 AbstractCegarLoop]: Abstraction has 180 states and 224 transitions. [2024-09-25 00:16:12,246 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) [2024-09-25 00:16:12,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 224 transitions. [2024-09-25 00:16:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 00:16:12,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:12,248 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] [2024-09-25 00:16:12,267 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:16:12,451 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 [2024-09-25 00:16:12,452 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:12,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:12,453 INFO L85 PathProgramCache]: Analyzing trace with hash 21325385, now seen corresponding path program 1 times [2024-09-25 00:16:12,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348026480] [2024-09-25 00:16:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:12,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:16:12,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804067949] [2024-09-25 00:16:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:12,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:12,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:12,486 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:16:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:12,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-09-25 00:16:12,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:12,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:12,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:12,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:16:12,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:12,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:14,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:14,011 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 74 treesize of output 50 [2024-09-25 00:16:14,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:14,042 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 70 treesize of output 50 [2024-09-25 00:16:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 00:16:14,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:16:19,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:16:19,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348026480] [2024-09-25 00:16:19,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:16:19,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804067949] [2024-09-25 00:16:19,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804067949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:16:19,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:16:19,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-25 00:16:19,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018727852] [2024-09-25 00:16:19,099 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:16:19,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 00:16:19,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:16:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 00:16:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=364, Unknown=1, NotChecked=0, Total=420 [2024-09-25 00:16:19,100 INFO L87 Difference]: Start difference. First operand 180 states and 224 transitions. Second operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:16:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:16:30,679 INFO L93 Difference]: Finished difference Result 188 states and 230 transitions. [2024-09-25 00:16:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 00:16:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-09-25 00:16:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:16:30,682 INFO L225 Difference]: With dead ends: 188 [2024-09-25 00:16:30,682 INFO L226 Difference]: Without dead ends: 186 [2024-09-25 00:16:30,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=203, Invalid=1126, Unknown=3, NotChecked=0, Total=1332 [2024-09-25 00:16:30,683 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 00:16:30,683 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 293 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 00:16:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-25 00:16:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-09-25 00:16:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 117 states have internal predecessors, (125), 45 states have call successors, (45), 21 states have call predecessors, (45), 27 states have return successors, (57), 46 states have call predecessors, (57), 41 states have call successors, (57) [2024-09-25 00:16:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 227 transitions. [2024-09-25 00:16:30,769 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 227 transitions. Word has length 42 [2024-09-25 00:16:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:16:30,769 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 227 transitions. [2024-09-25 00:16:30,769 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:16:30,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:30,770 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 227 transitions. [2024-09-25 00:16:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 00:16:30,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:16:30,772 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] [2024-09-25 00:16:30,788 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 00:16:30,972 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 [2024-09-25 00:16:30,973 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:16:30,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:16:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1606878135, now seen corresponding path program 1 times [2024-09-25 00:16:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:16:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506787820] [2024-09-25 00:16:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:30,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:16:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:16:31,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489544161] [2024-09-25 00:16:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:16:31,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:16:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:16:31,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:16:31,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:16:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:16:31,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-09-25 00:16:31,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:16:31,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:16:31,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:31,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:31,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:16:31,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:16:31,547 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 11 [2024-09-25 00:16:31,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:16:32,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:32,689 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 64 treesize of output 48 [2024-09-25 00:16:32,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:16:32,710 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 47 treesize of output 39 [2024-09-25 00:16:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 00:16:32,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:17:33,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:17:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506787820] [2024-09-25 00:17:33,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 00:17:33,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489544161] [2024-09-25 00:17:33,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489544161] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:17:33,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 00:17:33,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 00:17:33,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578376404] [2024-09-25 00:17:33,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 00:17:33,678 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 00:17:33,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:17:33,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 00:17:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=323, Unknown=11, NotChecked=0, Total=380 [2024-09-25 00:17:33,679 INFO L87 Difference]: Start difference. First operand 184 states and 227 transitions. Second operand has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:17:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:17:45,133 INFO L93 Difference]: Finished difference Result 236 states and 285 transitions. [2024-09-25 00:17:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:17:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-09-25 00:17:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:17:45,137 INFO L225 Difference]: With dead ends: 236 [2024-09-25 00:17:45,137 INFO L226 Difference]: Without dead ends: 234 [2024-09-25 00:17:45,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=100, Invalid=643, Unknown=13, NotChecked=0, Total=756 [2024-09-25 00:17:45,138 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 36 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-25 00:17:45,139 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 369 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1111 Invalid, 7 Unknown, 0 Unchecked, 2.4s Time] [2024-09-25 00:17:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-09-25 00:17:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2024-09-25 00:17:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 138 states have (on average 1.1159420289855073) internal successors, (154), 144 states have internal predecessors, (154), 55 states have call successors, (55), 26 states have call predecessors, (55), 34 states have return successors, (70), 57 states have call predecessors, (70), 50 states have call successors, (70) [2024-09-25 00:17:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2024-09-25 00:17:45,277 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 42 [2024-09-25 00:17:45,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:17:45,277 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2024-09-25 00:17:45,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-25 00:17:45,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:17:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2024-09-25 00:17:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 00:17:45,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:17:45,279 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] [2024-09-25 00:17:45,298 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 00:17:45,482 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 [2024-09-25 00:17:45,483 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:17:45,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:17:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash -211633676, now seen corresponding path program 4 times [2024-09-25 00:17:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:17:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730766288] [2024-09-25 00:17:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:17:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:17:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:46,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:17:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:46,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:17:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:46,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 00:17:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:51,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:17:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:51,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:17:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:52,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:17:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:53,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-25 00:17:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:17:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-25 00:17:53,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:17:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730766288] [2024-09-25 00:17:53,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730766288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:17:53,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273008622] [2024-09-25 00:17:53,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:17:53,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:17:53,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:17:53,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:17:53,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:17:53,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:17:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:17:53,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-09-25 00:17:53,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:17:53,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:17:53,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-25 00:17:53,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:17:54,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:17:55,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-25 00:17:55,119 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 [2024-09-25 00:17:59,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-25 00:17:59,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-25 00:17:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 00:17:59,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:18:02,560 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 251 treesize of output 239 [2024-09-25 00:18:03,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273008622] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:18:03,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 00:18:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 40 [2024-09-25 00:18:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056902931] [2024-09-25 00:18:03,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 00:18:03,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 00:18:03,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:18:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 00:18:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2030, Unknown=1, NotChecked=0, Total=2162 [2024-09-25 00:18:03,787 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 13 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-25 00:18:15,264 WARN L293 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 114 DAG size of output: 89 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 00:18:24,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:18:29,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-25 00:18:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:18:33,392 INFO L93 Difference]: Finished difference Result 295 states and 366 transitions. [2024-09-25 00:18:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-25 00:18:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 13 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 48 [2024-09-25 00:18:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:18:33,395 INFO L225 Difference]: With dead ends: 295 [2024-09-25 00:18:33,395 INFO L226 Difference]: Without dead ends: 293 [2024-09-25 00:18:33,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=517, Invalid=5644, Unknown=1, NotChecked=0, Total=6162 [2024-09-25 00:18:33,398 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 253 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 266 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-09-25 00:18:33,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 333 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1969 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2024-09-25 00:18:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-25 00:18:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 221. [2024-09-25 00:18:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 141 states have internal predecessors, (151), 54 states have call successors, (54), 26 states have call predecessors, (54), 31 states have return successors, (63), 53 states have call predecessors, (63), 49 states have call successors, (63) [2024-09-25 00:18:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 268 transitions. [2024-09-25 00:18:33,551 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 268 transitions. Word has length 48 [2024-09-25 00:18:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:18:33,552 INFO L474 AbstractCegarLoop]: Abstraction has 221 states and 268 transitions. [2024-09-25 00:18:33,552 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 13 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2024-09-25 00:18:33,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 268 transitions. [2024-09-25 00:18:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-25 00:18:33,553 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:18:33,553 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] [2024-09-25 00:18:33,570 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-25 00:18:33,754 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 [2024-09-25 00:18:33,754 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:18:33,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:18:33,755 INFO L85 PathProgramCache]: Analyzing trace with hash -959275072, now seen corresponding path program 1 times [2024-09-25 00:18:33,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:18:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907193703] [2024-09-25 00:18:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:33,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:18:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 00:18:33,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576301075] [2024-09-25 00:18:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:18:33,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:18:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:18:33,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:18:33,789 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:18:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:18:33,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-09-25 00:18:33,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:18:33,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-25 00:18:34,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:34,006 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 [2024-09-25 00:18:34,013 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 15 treesize of output 11 [2024-09-25 00:18:34,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-25 00:18:34,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-25 00:18:34,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-09-25 00:18:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 00:18:34,803 INFO L327 TraceCheckSpWp]: Computing backward predicates...