./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.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 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --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-27b4987-m [2024-09-21 12:38:26,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:38:26,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:38:26,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:38:26,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:38:26,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:38:26,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:38:26,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:38:26,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:38:26,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:38:26,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:38:26,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:38:26,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:38:26,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:38:26,694 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:38:26,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:38:26,694 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:38:26,694 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:38:26,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:38:26,695 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:38:26,695 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:38:26,699 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:38:26,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:38:26,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:38:26,700 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:38:26,700 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:38:26,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:38:26,700 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:38:26,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:38:26,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:38:26,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:38:26,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:38:26,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:38:26,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:38:26,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:38:26,703 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:38:26,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:38:26,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:38:26,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:38:26,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:38:26,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:38:26,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:38:26,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:38:26,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:38:26,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:38:26,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:38:26,956 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:38:26,956 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:38:26,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-21 12:38:28,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:38:28,538 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:38:28,539 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-21 12:38:28,546 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/59c36aa48/aee1a667ee094491b48c00d47dddfa0f/FLAG5cb2a56b7 [2024-09-21 12:38:28,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/59c36aa48/aee1a667ee094491b48c00d47dddfa0f [2024-09-21 12:38:28,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:38:28,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:38:28,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:38:28,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:38:28,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:38:28,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:28" (1/1) ... [2024-09-21 12:38:28,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b97d232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:28, skipping insertion in model container [2024-09-21 12:38:28,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:38:28" (1/1) ... [2024-09-21 12:38:28,969 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:38:29,138 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_hard2.c[1067,1080] [2024-09-21 12:38:29,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:38:29,182 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:38:29,194 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_hard2.c[1067,1080] [2024-09-21 12:38:29,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:38:29,235 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:38:29,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29 WrapperNode [2024-09-21 12:38:29,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:38:29,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:38:29,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:38:29,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:38:29,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,260 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,273 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:38:29,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:38:29,274 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:38:29,274 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:38:29,274 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:38:29,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,315 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 12, 6, 8, 9, 5, 6]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 1, 2, 3, 1, 2]. [2024-09-21 12:38:29,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,343 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:38:29,344 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:38:29,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:38:29,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:38:29,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (1/1) ... [2024-09-21 12:38:29,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:38:29,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:29,380 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) [2024-09-21 12:38:29,383 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 [2024-09-21 12:38:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:38:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-21 12:38:29,430 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-21 12:38:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:38:29,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:38:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:38:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 12:38:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-21 12:38:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-21 12:38:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-21 12:38:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-21 12:38:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-21 12:38:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-21 12:38:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-21 12:38:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 12:38:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 12:38:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-21 12:38:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-21 12:38:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-21 12:38:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-21 12:38:29,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-21 12:38:29,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-21 12:38:29,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:38:29,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:38:29,435 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-21 12:38:29,436 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-21 12:38:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:38:29,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:38:29,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 12:38:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 12:38:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-21 12:38:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-21 12:38:29,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-21 12:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-21 12:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-21 12:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-21 12:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:38:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-21 12:38:29,565 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:38:29,567 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:38:29,846 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-21 12:38:29,846 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:38:29,864 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:38:29,864 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 12:38:29,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:29 BoogieIcfgContainer [2024-09-21 12:38:29,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:38:29,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:38:29,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:38:29,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:38:29,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:38:28" (1/3) ... [2024-09-21 12:38:29,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27057a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:29, skipping insertion in model container [2024-09-21 12:38:29,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:38:29" (2/3) ... [2024-09-21 12:38:29,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27057a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:38:29, skipping insertion in model container [2024-09-21 12:38:29,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:38:29" (3/3) ... [2024-09-21 12:38:29,875 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-21 12:38:29,890 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:38:29,890 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:38:29,931 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:38:29,937 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;@6c858c37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:38:29,937 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:38:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 12:38:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-21 12:38:29,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:29,951 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:29,952 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:29,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-21 12:38:29,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:29,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701176770] [2024-09-21 12:38:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:30,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:38:30,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701176770] [2024-09-21 12:38:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701176770] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:38:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797347149] [2024-09-21 12:38:30,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:30,592 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:30,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:30,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:38:30,637 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:38:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:30,886 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-21 12:38:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:38:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-21 12:38:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:30,906 INFO L225 Difference]: With dead ends: 86 [2024-09-21 12:38:30,907 INFO L226 Difference]: Without dead ends: 44 [2024-09-21 12:38:30,910 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:38:30,915 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:30,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-21 12:38:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-21 12:38:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:38:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-21 12:38:30,954 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-21 12:38:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:30,954 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-21 12:38:30,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-21 12:38:30,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-21 12:38:30,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-21 12:38:30,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:30,957 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:30,957 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:38:30,957 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:30,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:30,958 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-21 12:38:30,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:30,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086754480] [2024-09-21 12:38:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:31,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:31,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:38:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:38:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:31,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086754480] [2024-09-21 12:38:31,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086754480] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:31,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:31,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:38:31,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724231031] [2024-09-21 12:38:31,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:31,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:31,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:38:31,235 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:38:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:31,499 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-21 12:38:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:38:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-21 12:38:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:31,501 INFO L225 Difference]: With dead ends: 50 [2024-09-21 12:38:31,501 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:38:31,501 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:38:31,504 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:31,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 240 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:38:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-21 12:38:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:38:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-21 12:38:31,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-21 12:38:31,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:31,526 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-21 12:38:31,526 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 12:38:31,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:31,526 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-21 12:38:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-21 12:38:31,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:31,528 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] [2024-09-21 12:38:31,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:38:31,528 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:31,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-21 12:38:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828816844] [2024-09-21 12:38:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:31,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116881699] [2024-09-21 12:38:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:31,583 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) [2024-09-21 12:38:31,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:38:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:31,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-21 12:38:31,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:31,800 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 [2024-09-21 12:38:31,806 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 [2024-09-21 12:38:31,814 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 [2024-09-21 12:38:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:38:32,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 12:38:32,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828816844] [2024-09-21 12:38:32,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116881699] [2024-09-21 12:38:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116881699] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:32,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-21 12:38:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719471133] [2024-09-21 12:38:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:32,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:38:32,419 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:38:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:32,665 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-21 12:38:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:38:32,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-21 12:38:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:32,668 INFO L225 Difference]: With dead ends: 59 [2024-09-21 12:38:32,668 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 12:38:32,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:38:32,670 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:32,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 12:38:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-21 12:38:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 12:38:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-21 12:38:32,686 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-21 12:38:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:32,687 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-21 12:38:32,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-21 12:38:32,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-21 12:38:32,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-21 12:38:32,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:32,688 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] [2024-09-21 12:38:32,705 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 12:38:32,890 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 [2024-09-21 12:38:32,891 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:32,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-21 12:38:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:32,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435434385] [2024-09-21 12:38:32,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:32,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374980086] [2024-09-21 12:38:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:32,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:32,934 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) [2024-09-21 12:38:32,936 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:38:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:33,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-21 12:38:33,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:33,085 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 [2024-09-21 12:38:33,091 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 [2024-09-21 12:38:33,094 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 [2024-09-21 12:38:33,101 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 [2024-09-21 12:38:33,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:38:33,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-21 12:38:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:38:33,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:38:33,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:33,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435434385] [2024-09-21 12:38:33,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374980086] [2024-09-21 12:38:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374980086] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:33,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:33,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-21 12:38:33,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596802907] [2024-09-21 12:38:33,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:33,645 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:38:33,646 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:38:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:33,885 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-21 12:38:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:38:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-21 12:38:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:33,892 INFO L225 Difference]: With dead ends: 72 [2024-09-21 12:38:33,892 INFO L226 Difference]: Without dead ends: 70 [2024-09-21 12:38:33,892 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:38:33,896 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:33,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 252 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-21 12:38:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-21 12:38:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2024-09-21 12:38:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-21 12:38:33,927 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-21 12:38:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:33,927 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-21 12:38:33,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:38:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-21 12:38:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-21 12:38:33,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:33,930 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] [2024-09-21 12:38:33,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:38:34,130 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 [2024-09-21 12:38:34,130 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:34,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-21 12:38:34,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:34,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885152704] [2024-09-21 12:38:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:34,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396624256] [2024-09-21 12:38:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:34,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:34,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:34,191 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) [2024-09-21 12:38:34,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:38:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:34,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-21 12:38:34,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:34,325 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 [2024-09-21 12:38:34,329 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 [2024-09-21 12:38:34,334 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 [2024-09-21 12:38:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:38:34,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:35,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885152704] [2024-09-21 12:38:35,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396624256] [2024-09-21 12:38:35,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396624256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:35,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:35,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-21 12:38:35,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867408689] [2024-09-21 12:38:35,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:35,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 12:38:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 12:38:35,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:38:35,457 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-21 12:38:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:35,954 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-21 12:38:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:38:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-21 12:38:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:35,956 INFO L225 Difference]: With dead ends: 126 [2024-09-21 12:38:35,956 INFO L226 Difference]: Without dead ends: 124 [2024-09-21 12:38:35,957 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:38:35,957 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:35,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 132 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:38:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-21 12:38:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-21 12:38:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2024-09-21 12:38:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-21 12:38:36,002 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-21 12:38:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:36,003 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-21 12:38:36,003 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-21 12:38:36,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-21 12:38:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-21 12:38:36,005 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:36,005 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:36,023 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:38:36,205 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 [2024-09-21 12:38:36,207 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:36,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:36,207 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-21 12:38:36,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:36,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237678298] [2024-09-21 12:38:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:36,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:36,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732674055] [2024-09-21 12:38:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:36,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:36,238 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) [2024-09-21 12:38:36,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:38:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:36,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-21 12:38:36,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:36,375 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 [2024-09-21 12:38:36,380 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 [2024-09-21 12:38:36,385 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 [2024-09-21 12:38:36,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 12:38:36,663 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 [2024-09-21 12:38:36,667 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 [2024-09-21 12:38:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:38:36,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:36,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:36,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237678298] [2024-09-21 12:38:36,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:36,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732674055] [2024-09-21 12:38:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732674055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:36,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:36,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-21 12:38:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513424926] [2024-09-21 12:38:36,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:36,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:38:36,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:36,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:38:36,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:38:36,869 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 12:38:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:37,275 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2024-09-21 12:38:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:38:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-09-21 12:38:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:37,277 INFO L225 Difference]: With dead ends: 140 [2024-09-21 12:38:37,277 INFO L226 Difference]: Without dead ends: 136 [2024-09-21 12:38:37,278 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:38:37,278 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:37,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 88 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:38:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-21 12:38:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2024-09-21 12:38:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 26 states have call successors, (26), 20 states have call predecessors, (26), 21 states have return successors, (31), 24 states have call predecessors, (31), 22 states have call successors, (31) [2024-09-21 12:38:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2024-09-21 12:38:37,338 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 52 [2024-09-21 12:38:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:37,338 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2024-09-21 12:38:37,338 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-21 12:38:37,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2024-09-21 12:38:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-21 12:38:37,340 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:37,340 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:37,359 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:37,544 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 [2024-09-21 12:38:37,545 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:37,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-21 12:38:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:37,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277936242] [2024-09-21 12:38:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:38:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:38:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:38:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:38:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 12:38:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 12:38:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:38:37,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:37,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277936242] [2024-09-21 12:38:37,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277936242] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:37,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:37,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-21 12:38:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857332357] [2024-09-21 12:38:37,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:37,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-21 12:38:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:37,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-21 12:38:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:38:37,791 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-21 12:38:38,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:38,022 INFO L93 Difference]: Finished difference Result 180 states and 207 transitions. [2024-09-21 12:38:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:38:38,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-21 12:38:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:38,025 INFO L225 Difference]: With dead ends: 180 [2024-09-21 12:38:38,026 INFO L226 Difference]: Without dead ends: 132 [2024-09-21 12:38:38,026 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:38:38,028 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:38,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-21 12:38:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-21 12:38:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (27), 24 states have call predecessors, (27), 22 states have call successors, (27) [2024-09-21 12:38:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-09-21 12:38:38,097 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 53 [2024-09-21 12:38:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:38,097 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-09-21 12:38:38,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-21 12:38:38,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-09-21 12:38:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-21 12:38:38,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:38,101 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:38,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-21 12:38:38,101 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:38,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-21 12:38:38,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:38,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770797920] [2024-09-21 12:38:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:38,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:38:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:38:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:38:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:38:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 12:38:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 12:38:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:38:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-21 12:38:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-21 12:38:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 12:38:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:38,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770797920] [2024-09-21 12:38:38,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770797920] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:38:38,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:38:38,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-21 12:38:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335762927] [2024-09-21 12:38:38,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:38:38,392 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-21 12:38:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-21 12:38:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-21 12:38:38,393 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 12:38:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:38,625 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2024-09-21 12:38:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:38:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-21 12:38:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:38,627 INFO L225 Difference]: With dead ends: 134 [2024-09-21 12:38:38,627 INFO L226 Difference]: Without dead ends: 102 [2024-09-21 12:38:38,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:38:38,628 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:38,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:38:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-21 12:38:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2024-09-21 12:38:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 66 states have internal predecessors, (70), 21 states have call successors, (21), 15 states have call predecessors, (21), 15 states have return successors, (22), 19 states have call predecessors, (22), 18 states have call successors, (22) [2024-09-21 12:38:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2024-09-21 12:38:38,662 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 58 [2024-09-21 12:38:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:38,663 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2024-09-21 12:38:38,663 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-21 12:38:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2024-09-21 12:38:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-21 12:38:38,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:38,668 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:38,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-21 12:38:38,668 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:38,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-21 12:38:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:38,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743627189] [2024-09-21 12:38:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:38,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651780229] [2024-09-21 12:38:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:38,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:38,735 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) [2024-09-21 12:38:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:38:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:38:38,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-21 12:38:38,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:38,888 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 [2024-09-21 12:38:38,892 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 [2024-09-21 12:38:38,896 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 [2024-09-21 12:38:39,231 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 [2024-09-21 12:38:39,237 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 [2024-09-21 12:38:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-21 12:38:39,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:39,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743627189] [2024-09-21 12:38:39,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:39,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651780229] [2024-09-21 12:38:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651780229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:39,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:39,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-21 12:38:39,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795431905] [2024-09-21 12:38:39,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:39,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-21 12:38:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-21 12:38:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:38:39,871 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-21 12:38:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:40,635 INFO L93 Difference]: Finished difference Result 134 states and 152 transitions. [2024-09-21 12:38:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:38:40,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2024-09-21 12:38:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:40,638 INFO L225 Difference]: With dead ends: 134 [2024-09-21 12:38:40,638 INFO L226 Difference]: Without dead ends: 132 [2024-09-21 12:38:40,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:38:40,639 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 25 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:40,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 160 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:38:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-21 12:38:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-09-21 12:38:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 85 states have internal predecessors, (91), 26 states have call successors, (26), 19 states have call predecessors, (26), 21 states have return successors, (32), 25 states have call predecessors, (32), 22 states have call successors, (32) [2024-09-21 12:38:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-09-21 12:38:40,681 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 66 [2024-09-21 12:38:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:40,682 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-09-21 12:38:40,683 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-21 12:38:40,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-09-21 12:38:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-21 12:38:40,686 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:40,686 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:40,703 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:40,886 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:40,887 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:40,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-21 12:38:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022341285] [2024-09-21 12:38:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:40,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700932816] [2024-09-21 12:38:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:38:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:40,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:40,934 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) [2024-09-21 12:38:40,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:38:41,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:38:41,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:41,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-21 12:38:41,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:41,120 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 [2024-09-21 12:38:41,123 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 [2024-09-21 12:38:41,126 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 [2024-09-21 12:38:41,657 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 [2024-09-21 12:38:41,666 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 [2024-09-21 12:38:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-21 12:38:41,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:42,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:42,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022341285] [2024-09-21 12:38:42,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:42,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700932816] [2024-09-21 12:38:42,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700932816] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:42,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-21 12:38:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584564639] [2024-09-21 12:38:42,541 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:42,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 12:38:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 12:38:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:38:42,543 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-21 12:38:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:43,345 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2024-09-21 12:38:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:38:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 90 [2024-09-21 12:38:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:43,347 INFO L225 Difference]: With dead ends: 162 [2024-09-21 12:38:43,347 INFO L226 Difference]: Without dead ends: 160 [2024-09-21 12:38:43,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:38:43,348 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 43 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:43,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 224 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-21 12:38:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-21 12:38:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2024-09-21 12:38:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 26 states have call successors, (26), 19 states have call predecessors, (26), 22 states have return successors, (34), 26 states have call predecessors, (34), 22 states have call successors, (34) [2024-09-21 12:38:43,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2024-09-21 12:38:43,405 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 90 [2024-09-21 12:38:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:43,405 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2024-09-21 12:38:43,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-21 12:38:43,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2024-09-21 12:38:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-21 12:38:43,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:43,407 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:43,422 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:43,608 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-21 12:38:43,608 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:43,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-21 12:38:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:43,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14859527] [2024-09-21 12:38:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:43,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988758949] [2024-09-21 12:38:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:38:43,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:43,654 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) [2024-09-21 12:38:43,658 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:38:43,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:38:43,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:43,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-09-21 12:38:43,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:43,973 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 [2024-09-21 12:38:43,979 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 [2024-09-21 12:38:44,014 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 253686 treesize of output 251638 [2024-09-21 12:38:44,122 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 [2024-09-21 12:38:44,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-21 12:38:44,896 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 [2024-09-21 12:38:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 48 proven. 64 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-09-21 12:38:45,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:38:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:38:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14859527] [2024-09-21 12:38:46,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:38:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988758949] [2024-09-21 12:38:46,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988758949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:38:46,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:38:46,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-21 12:38:46,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078170414] [2024-09-21 12:38:46,210 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:38:46,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:38:46,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:38:46,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:38:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:38:46,211 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-21 12:38:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:38:47,194 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2024-09-21 12:38:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:38:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 114 [2024-09-21 12:38:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:38:47,196 INFO L225 Difference]: With dead ends: 164 [2024-09-21 12:38:47,197 INFO L226 Difference]: Without dead ends: 162 [2024-09-21 12:38:47,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:38:47,198 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-21 12:38:47,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 221 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-09-21 12:38:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-21 12:38:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2024-09-21 12:38:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 26 states have call successors, (26), 19 states have call predecessors, (26), 23 states have return successors, (36), 27 states have call predecessors, (36), 22 states have call successors, (36) [2024-09-21 12:38:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2024-09-21 12:38:47,252 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 114 [2024-09-21 12:38:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:38:47,253 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2024-09-21 12:38:47,253 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-21 12:38:47,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2024-09-21 12:38:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-21 12:38:47,255 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:38:47,255 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:38:47,264 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-21 12:38:47,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:47,456 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:38:47,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:38:47,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-21 12:38:47,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:38:47,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184423321] [2024-09-21 12:38:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:38:47,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:38:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:38:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017215832] [2024-09-21 12:38:47,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:38:47,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:38:47,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:38:47,504 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) [2024-09-21 12:38:47,512 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:38:47,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:38:47,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:38:47,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 286 conjuncts are in the unsatisfiable core [2024-09-21 12:38:47,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:38:48,176 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 35 treesize of output 23 [2024-09-21 12:38:48,185 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 37 treesize of output 25 [2024-09-21 12:38:48,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-09-21 12:38:48,281 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 [2024-09-21 12:38:48,996 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 13 [2024-09-21 12:38:48,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-21 12:38:53,458 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2 Int)) (<= (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2) (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15|))) is different from true [2024-09-21 12:39:02,571 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 13 [2024-09-21 12:39:02,577 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 [2024-09-21 12:40:15,015 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2 Int)) (<= (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2) (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15|))) (exists ((|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16| Int) (func_to_recursive_line_30_to_37_0_~r.base Int) (func_to_recursive_line_30_to_37_0_~r.offset Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16| Int) (v_arrayElimCell_19 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16| Int)) (let ((.cse0 (select (select |c_#memory_int#4| func_to_recursive_line_30_to_37_0_~r.base) func_to_recursive_line_30_to_37_0_~r.offset))) (and (<= .cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16|)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16|) v_arrayElimCell_19) .cse0))))) is different from true [2024-09-21 12:40:51,419 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_58 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16| Int) (v_arrayElimCell_19 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_58 Int)) (let ((.cse0 (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_58) v_func_to_recursive_line_30_to_37_0_~r.offset_58))) (and (<= .cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16|)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16|) v_arrayElimCell_19) .cse0)))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2 Int)) (<= (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2) (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15|)))) is different from true [2024-09-21 12:41:16,078 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_58 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16| Int) (v_arrayElimCell_19 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_58 Int)) (let ((.cse0 (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_58) v_func_to_recursive_line_30_to_37_0_~r.offset_58))) (and (<= .cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_16|)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_16|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_16|) v_arrayElimCell_19) .cse0)))) (exists ((|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_19| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_19| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_4 Int) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_4 Int)) (<= (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_19|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_19|) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_4) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_4))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2 Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2 Int)) (<= (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_2) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_2) (select (select |c_#memory_int#6| |v_func_to_recursive_line_30_to_37_0_#in~A.base_BEFORE_CALL_15|) |v_func_to_recursive_line_30_to_37_0_#in~A.offset_BEFORE_CALL_15|)))) is different from true [2024-09-21 12:41:54,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2024-09-21 12:41:54,761 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 71 treesize of output 51 [2024-09-21 12:41:56,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:41:56,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 191 [2024-09-21 12:41:56,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:41:56,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 88 [2024-09-21 12:42:00,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2024-09-21 12:42:00,605 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 77 treesize of output 53 [2024-09-21 12:42:00,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-09-21 12:42:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 315 proven. 115 refuted. 0 times theorem prover too weak. 162 trivial. 36 not checked. [2024-09-21 12:42:13,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:42:46,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-21 12:42:46,791 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 46 [2024-09-21 12:42:46,798 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 [2024-09-21 12:42:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:42:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184423321] [2024-09-21 12:42:47,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:42:47,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017215832] [2024-09-21 12:42:47,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017215832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:42:47,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:42:47,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2024-09-21 12:42:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016757327] [2024-09-21 12:42:47,416 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:42:47,416 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-21 12:42:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:42:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-21 12:42:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2334, Unknown=40, NotChecked=404, Total=2970 [2024-09-21 12:42:47,418 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 49 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 17 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (19), 16 states have call predecessors, (19), 15 states have call successors, (19) [2024-09-21 12:42:51,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:42:55,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-21 12:42:59,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]