./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 04:12:54,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 04:12:54,484 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 04:12:54,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 04:12:54,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 04:12:54,522 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 04:12:54,523 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 04:12:54,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 04:12:54,524 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 04:12:54,525 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 04:12:54,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 04:12:54,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 04:12:54,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 04:12:54,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 04:12:54,527 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 04:12:54,529 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 04:12:54,529 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 04:12:54,529 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 04:12:54,530 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 04:12:54,530 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 04:12:54,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 04:12:54,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 04:12:54,533 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 04:12:54,533 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 04:12:54,533 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 04:12:54,534 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 04:12:54,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 04:12:54,534 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 04:12:54,534 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 04:12:54,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 04:12:54,535 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 04:12:54,535 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 04:12:54,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:12:54,535 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 04:12:54,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 04:12:54,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 04:12:54,536 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 04:12:54,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 04:12:54,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 04:12:54,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 04:12:54,538 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 04:12:54,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 04:12:54,538 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ae1eacd45e2434e505261d43bb17259916099964617682d271ef41fa1c24d0c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 04:12:54,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 04:12:54,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 04:12:54,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 04:12:54,791 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 04:12:54,791 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 04:12:54,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-13 04:12:56,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 04:12:56,377 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 04:12:56,377 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c [2024-09-13 04:12:56,384 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6ee25417d/e02b1f12633e40d8a6a9b84c75155622/FLAGcdbd1bf5d [2024-09-13 04:12:56,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6ee25417d/e02b1f12633e40d8a6a9b84c75155622 [2024-09-13 04:12:56,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 04:12:56,403 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 04:12:56,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 04:12:56,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 04:12:56,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 04:12:56,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1942cb8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56, skipping insertion in model container [2024-09-13 04:12:56,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,428 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 04:12:56,587 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c[1060,1073] [2024-09-13 04:12:56,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:12:56,619 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 04:12:56,629 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_fermat2-ll.c[1060,1073] [2024-09-13 04:12:56,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 04:12:56,671 INFO L204 MainTranslator]: Completed translation [2024-09-13 04:12:56,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56 WrapperNode [2024-09-13 04:12:56,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 04:12:56,677 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 04:12:56,677 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 04:12:56,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 04:12:56,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,705 INFO L138 Inliner]: procedures = 16, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 04:12:56,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 04:12:56,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 04:12:56,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 04:12:56,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 04:12:56,723 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,744 INFO L175 MemorySlicer]: Split 36 memory accesses to 5 slices as follows [2, 8, 6, 10, 10]. 28 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 3, 1, 2, 2]. [2024-09-13 04:12:56,745 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,753 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,756 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 04:12:56,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 04:12:56,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 04:12:56,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 04:12:56,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (1/1) ... [2024-09-13 04:12:56,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 04:12:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:12:56,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 04:12:56,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 04:12:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 04:12:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 04:12:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 04:12:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 04:12:56,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 04:12:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 04:12:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-13 04:12:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-13 04:12:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-13 04:12:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-13 04:12:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-13 04:12:56,862 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_42_0 [2024-09-13 04:12:56,862 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_42_0 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-13 04:12:56,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 04:12:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 04:12:56,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 04:12:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 04:12:56,865 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 04:12:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-13 04:12:56,978 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 04:12:56,980 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 04:12:57,190 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-13 04:12:57,191 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 04:12:57,208 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 04:12:57,208 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-13 04:12:57,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:12:57 BoogieIcfgContainer [2024-09-13 04:12:57,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 04:12:57,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 04:12:57,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 04:12:57,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 04:12:57,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 04:12:56" (1/3) ... [2024-09-13 04:12:57,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494464aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:12:57, skipping insertion in model container [2024-09-13 04:12:57,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 04:12:56" (2/3) ... [2024-09-13 04:12:57,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494464aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 04:12:57, skipping insertion in model container [2024-09-13 04:12:57,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 04:12:57" (3/3) ... [2024-09-13 04:12:57,217 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat2-ll.c [2024-09-13 04:12:57,234 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 04:12:57,235 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 04:12:57,283 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 04:12:57,290 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;@5b791084, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 04:12:57,290 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 04:12:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 04:12:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 04:12:57,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:12:57,301 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:12:57,301 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:12:57,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -896464560, now seen corresponding path program 1 times [2024-09-13 04:12:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:12:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440731498] [2024-09-13 04:12:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:12:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:57,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:12:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:57,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:12:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:57,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:12:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 04:12:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:12:57,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440731498] [2024-09-13 04:12:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440731498] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 04:12:57,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 04:12:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 04:12:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521157120] [2024-09-13 04:12:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 04:12:57,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 04:12:57,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:12:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 04:12:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 04:12:57,571 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 04:12:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:12:57,597 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-09-13 04:12:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 04:12:57,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-13 04:12:57,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:12:57,605 INFO L225 Difference]: With dead ends: 64 [2024-09-13 04:12:57,605 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 04:12:57,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 04:12:57,611 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 04:12:57,611 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 04:12:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 04:12:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 04:12:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-13 04:12:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-13 04:12:57,642 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2024-09-13 04:12:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:12:57,644 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-13 04:12:57,644 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 04:12:57,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-13 04:12:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-13 04:12:57,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:12:57,651 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:12:57,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 04:12:57,651 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:12:57,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:12:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1783747884, now seen corresponding path program 1 times [2024-09-13 04:12:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:12:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719983515] [2024-09-13 04:12:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:12:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:12:57,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329061242] [2024-09-13 04:12:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:12:57,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:12:57,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:12:57,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:12:57,742 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 04:12:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:12:57,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 04:12:57,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:12:57,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:12:57,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:12:57,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:12:58,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:12:58,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-13 04:12:58,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-13 04:12:58,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2024-09-13 04:12:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 04:12:58,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 04:12:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:12:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719983515] [2024-09-13 04:12:58,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:12:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329061242] [2024-09-13 04:12:58,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329061242] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 04:12:58,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 04:12:58,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-13 04:12:58,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854701639] [2024-09-13 04:12:58,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 04:12:58,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 04:12:58,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:12:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 04:12:58,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 04:12:58,468 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 04:13:00,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:13:00,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:13:00,574 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-09-13 04:13:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 04:13:00,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2024-09-13 04:13:00,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:13:00,577 INFO L225 Difference]: With dead ends: 49 [2024-09-13 04:13:00,577 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 04:13:00,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 04:13:00,579 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-13 04:13:00,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 145 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-13 04:13:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 04:13:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 04:13:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-13 04:13:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-09-13 04:13:00,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 24 [2024-09-13 04:13:00,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:13:00,598 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-09-13 04:13:00,599 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 04:13:00,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:13:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-09-13 04:13:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 04:13:00,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:13:00,600 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:13:00,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 04:13:00,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:13:00,801 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:13:00,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:13:00,802 INFO L85 PathProgramCache]: Analyzing trace with hash -391677542, now seen corresponding path program 1 times [2024-09-13 04:13:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:13:00,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434195124] [2024-09-13 04:13:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:13:00,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:13:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:13:00,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695718731] [2024-09-13 04:13:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:13:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:13:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:13:00,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:13:00,887 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 04:13:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:13:01,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 04:13:01,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:13:01,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:13:01,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:13:01,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:13:01,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:13:01,314 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 51 treesize of output 35 [2024-09-13 04:13:01,722 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 97 treesize of output 61 [2024-09-13 04:13:01,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:13:01,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 63 [2024-09-13 04:13:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:13:01,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:13:07,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:13:07,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434195124] [2024-09-13 04:13:07,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:13:07,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695718731] [2024-09-13 04:13:07,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695718731] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:13:07,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:13:07,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 04:13:07,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756361460] [2024-09-13 04:13:07,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:13:07,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 04:13:07,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:13:07,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 04:13:07,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-09-13 04:13:07,300 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:13:11,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:13:13,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:13:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:13:13,709 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-13 04:13:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 04:13:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 34 [2024-09-13 04:13:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:13:13,713 INFO L225 Difference]: With dead ends: 60 [2024-09-13 04:13:13,714 INFO L226 Difference]: Without dead ends: 52 [2024-09-13 04:13:13,715 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 04:13:13,716 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-13 04:13:13,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2024-09-13 04:13:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-13 04:13:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-13 04:13:13,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 9 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-13 04:13:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-13 04:13:13,759 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 34 [2024-09-13 04:13:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:13:13,760 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-13 04:13:13,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 6 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 04:13:13,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:13:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-13 04:13:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 04:13:13,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:13:13,763 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:13:13,780 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 04:13:13,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:13:13,964 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:13:13,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:13:13,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1901447163, now seen corresponding path program 1 times [2024-09-13 04:13:13,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:13:13,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416804784] [2024-09-13 04:13:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:13:13,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:13:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:13:14,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634223402] [2024-09-13 04:13:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:13:14,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:13:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:13:14,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:13:14,058 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 04:13:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:13:14,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-09-13 04:13:14,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:13:14,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:13:14,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:13:14,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:13:14,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:13:14,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-09-13 04:13:14,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:13:14,934 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 79 treesize of output 67 [2024-09-13 04:13:14,942 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 62 treesize of output 46 [2024-09-13 04:13:14,947 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 115 treesize of output 71 [2024-09-13 04:13:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 04:13:15,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:13:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 04:13:30,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:13:30,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416804784] [2024-09-13 04:13:30,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:13:30,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634223402] [2024-09-13 04:13:30,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634223402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 04:13:30,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 04:13:30,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2024-09-13 04:13:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797904481] [2024-09-13 04:13:30,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 04:13:30,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 04:13:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:13:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 04:13:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-09-13 04:13:30,793 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 04:13:34,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:13:38,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:13:40,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:14:05,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:14:10,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:14:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:14:11,160 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2024-09-13 04:14:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 04:14:11,161 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 35 [2024-09-13 04:14:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:14:11,162 INFO L225 Difference]: With dead ends: 83 [2024-09-13 04:14:11,163 INFO L226 Difference]: Without dead ends: 77 [2024-09-13 04:14:11,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=228, Invalid=1331, Unknown=1, NotChecked=0, Total=1560 [2024-09-13 04:14:11,164 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2024-09-13 04:14:11,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 286 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 528 Invalid, 2 Unknown, 0 Unchecked, 20.6s Time] [2024-09-13 04:14:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-13 04:14:11,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-09-13 04:14:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2024-09-13 04:14:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2024-09-13 04:14:11,207 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 35 [2024-09-13 04:14:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:14:11,207 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2024-09-13 04:14:11,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 11 states have call successors, (14), 8 states have call predecessors, (14), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2024-09-13 04:14:11,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:14:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2024-09-13 04:14:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 04:14:11,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:14:11,211 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:14:11,220 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 04:14:11,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:14:11,416 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:14:11,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:14:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash 987710829, now seen corresponding path program 1 times [2024-09-13 04:14:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:14:11,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788923410] [2024-09-13 04:14:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:14:11,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:14:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:14:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360982095] [2024-09-13 04:14:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:14:11,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:14:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:14:11,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:14:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 04:14:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:14:11,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-13 04:14:11,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:14:11,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:14:11,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:14:11,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:14:11,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:14:11,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:14:11,839 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 51 treesize of output 35 [2024-09-13 04:14:16,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2024-09-13 04:14:16,382 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 99 treesize of output 63 [2024-09-13 04:14:16,463 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 105 treesize of output 65 [2024-09-13 04:14:16,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:14:16,483 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 71 treesize of output 67 [2024-09-13 04:14:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 04:14:17,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:14:25,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:14:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788923410] [2024-09-13 04:14:25,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:14:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360982095] [2024-09-13 04:14:25,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360982095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:14:25,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:14:25,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 04:14:25,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117976963] [2024-09-13 04:14:25,705 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:14:25,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 04:14:25,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:14:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 04:14:25,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=519, Unknown=1, NotChecked=0, Total=600 [2024-09-13 04:14:25,707 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 04:14:29,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:34,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:36,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:40,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:44,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:14:45,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:14:45,900 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2024-09-13 04:14:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 04:14:45,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-13 04:14:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:14:45,903 INFO L225 Difference]: With dead ends: 85 [2024-09-13 04:14:45,903 INFO L226 Difference]: Without dead ends: 79 [2024-09-13 04:14:45,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=150, Invalid=1039, Unknown=1, NotChecked=0, Total=1190 [2024-09-13 04:14:45,905 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2024-09-13 04:14:45,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 110 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 438 Invalid, 4 Unknown, 0 Unchecked, 19.8s Time] [2024-09-13 04:14:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-13 04:14:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2024-09-13 04:14:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 14 states have call successors, (14), 12 states have call predecessors, (14), 14 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-13 04:14:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2024-09-13 04:14:45,964 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 47 [2024-09-13 04:14:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:14:45,967 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2024-09-13 04:14:45,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 04:14:45,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:14:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2024-09-13 04:14:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 04:14:45,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:14:45,970 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:14:45,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 04:14:46,170 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:14:46,170 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:14:46,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:14:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1805359279, now seen corresponding path program 1 times [2024-09-13 04:14:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:14:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065818797] [2024-09-13 04:14:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:14:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:14:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:14:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70353221] [2024-09-13 04:14:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:14:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:14:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:14:46,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:14:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 04:14:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:14:46,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-09-13 04:14:46,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:14:46,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:14:46,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:14:46,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:14:46,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:14:46,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:14:46,572 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 51 treesize of output 35 [2024-09-13 04:14:52,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:14:52,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:14:52,113 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 89 treesize of output 85 [2024-09-13 04:14:52,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 55 [2024-09-13 04:14:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 04:14:53,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:14:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:14:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065818797] [2024-09-13 04:14:59,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:14:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70353221] [2024-09-13 04:14:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70353221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:14:59,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:14:59,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 04:14:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483955297] [2024-09-13 04:14:59,795 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:14:59,795 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 04:14:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:14:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 04:14:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-09-13 04:14:59,796 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 04:15:03,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:16:54,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83m for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:16:58,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:16:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:16:59,139 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-09-13 04:16:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 04:16:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-13 04:16:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:16:59,141 INFO L225 Difference]: With dead ends: 97 [2024-09-13 04:16:59,141 INFO L226 Difference]: Without dead ends: 87 [2024-09-13 04:16:59,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 04:16:59,143 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.0s IncrementalHoareTripleChecker+Time [2024-09-13 04:16:59,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 570 Invalid, 3 Unknown, 0 Unchecked, 119.0s Time] [2024-09-13 04:16:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-13 04:16:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-13 04:16:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 58 states have internal predecessors, (62), 16 states have call successors, (16), 13 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-13 04:16:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-13 04:16:59,210 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 47 [2024-09-13 04:16:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:16:59,211 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-13 04:16:59,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 04:16:59,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-13 04:16:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 04:16:59,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:16:59,216 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:16:59,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 04:16:59,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 04:16:59,417 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:16:59,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:16:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1682971646, now seen corresponding path program 2 times [2024-09-13 04:16:59,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:16:59,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160786910] [2024-09-13 04:16:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:16:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:16:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:16:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915150225] [2024-09-13 04:16:59,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:16:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:16:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:16:59,480 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:16:59,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 04:16:59,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:16:59,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:16:59,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 149 conjuncts are in the unsatisfiable core [2024-09-13 04:16:59,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:16:59,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:16:59,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:16:59,800 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 15 treesize of output 11 [2024-09-13 04:16:59,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:17:01,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-13 04:17:01,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-09-13 04:17:14,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2024-09-13 04:17:14,229 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 111 treesize of output 75 [2024-09-13 04:17:14,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:17:14,322 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 106 treesize of output 102 [2024-09-13 04:17:14,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 68 [2024-09-13 04:17:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 04:17:14,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:17:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:17:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160786910] [2024-09-13 04:17:16,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:17:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915150225] [2024-09-13 04:17:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915150225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:17:16,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:17:16,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 04:17:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766592560] [2024-09-13 04:17:16,625 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:17:16,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 04:17:16,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:17:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 04:17:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2024-09-13 04:17:16,626 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 04:17:20,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:24,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:29,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:33,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:35,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:39,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:43,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:17:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:17:44,693 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2024-09-13 04:17:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 04:17:44,694 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 60 [2024-09-13 04:17:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:17:44,696 INFO L225 Difference]: With dead ends: 94 [2024-09-13 04:17:44,696 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 04:17:44,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=151, Invalid=1409, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 04:17:44,698 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 9 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2024-09-13 04:17:44,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 132 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 462 Invalid, 5 Unknown, 0 Unchecked, 27.6s Time] [2024-09-13 04:17:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 04:17:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-13 04:17:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 16 states have call successors, (16), 13 states have call predecessors, (16), 15 states have return successors, (33), 15 states have call predecessors, (33), 14 states have call successors, (33) [2024-09-13 04:17:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 112 transitions. [2024-09-13 04:17:44,760 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 112 transitions. Word has length 60 [2024-09-13 04:17:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:17:44,761 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 112 transitions. [2024-09-13 04:17:44,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 20 states have internal predecessors, (30), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-13 04:17:44,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:17:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 112 transitions. [2024-09-13 04:17:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 04:17:44,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:17:44,763 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:17:44,782 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 04:17:44,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:17:44,964 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:17:44,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:17:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash 628554005, now seen corresponding path program 3 times [2024-09-13 04:17:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:17:44,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642347587] [2024-09-13 04:17:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:17:44,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:17:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:17:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62581220] [2024-09-13 04:17:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 04:17:45,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:17:45,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:17:45,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:17:45,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 04:17:45,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 04:17:45,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:17:45,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-09-13 04:17:45,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:17:45,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:17:45,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:17:45,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:17:45,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:17:45,726 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 51 treesize of output 35 [2024-09-13 04:17:51,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2024-09-13 04:17:51,822 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 102 treesize of output 66 [2024-09-13 04:17:51,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:17:51,932 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 97 treesize of output 93 [2024-09-13 04:17:51,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 77 [2024-09-13 04:17:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 04:17:52,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:17:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:17:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642347587] [2024-09-13 04:17:54,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:17:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62581220] [2024-09-13 04:17:54,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62581220] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:17:54,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:17:54,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 04:17:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552933598] [2024-09-13 04:17:54,428 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:17:54,428 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 04:17:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:17:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 04:17:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=828, Unknown=1, NotChecked=0, Total=930 [2024-09-13 04:17:54,429 INFO L87 Difference]: Start difference. First operand 88 states and 112 transitions. Second operand has 24 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-13 04:17:58,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:04,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:08,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:12,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:16,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:20,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:18:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:18:20,790 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2024-09-13 04:18:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 04:18:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2024-09-13 04:18:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:18:20,792 INFO L225 Difference]: With dead ends: 96 [2024-09-13 04:18:20,792 INFO L226 Difference]: Without dead ends: 90 [2024-09-13 04:18:20,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=192, Invalid=1613, Unknown=1, NotChecked=0, Total=1806 [2024-09-13 04:18:20,794 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2024-09-13 04:18:20,794 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 163 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 611 Invalid, 5 Unknown, 0 Unchecked, 25.8s Time] [2024-09-13 04:18:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-13 04:18:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-09-13 04:18:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 60 states have internal predecessors, (64), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (38), 16 states have call predecessors, (38), 14 states have call successors, (38) [2024-09-13 04:18:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2024-09-13 04:18:20,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 73 [2024-09-13 04:18:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:18:20,853 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2024-09-13 04:18:20,853 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (10), 5 states have call predecessors, (10), 9 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-13 04:18:20,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2024-09-13 04:18:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-13 04:18:20,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:18:20,854 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:18:20,865 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 04:18:21,055 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:21,055 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:18:21,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -362786198, now seen corresponding path program 4 times [2024-09-13 04:18:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:18:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582639237] [2024-09-13 04:18:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:18:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:18:21,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490272915] [2024-09-13 04:18:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 04:18:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:18:21,148 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:18:21,150 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 04:18:21,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 04:18:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:18:21,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-13 04:18:21,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:18:21,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:18:21,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:18:21,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:18:21,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:18:23,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2024-09-13 04:18:23,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2024-09-13 04:18:23,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:18:23,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2024-09-13 04:18:23,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 39 [2024-09-13 04:18:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 5 proven. 53 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 04:18:23,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:18:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:18:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582639237] [2024-09-13 04:18:26,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:18:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490272915] [2024-09-13 04:18:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490272915] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:18:26,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:18:26,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-13 04:18:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591952865] [2024-09-13 04:18:26,572 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:18:26,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 04:18:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:18:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 04:18:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2024-09-13 04:18:26,574 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-13 04:18:30,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-13 04:18:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:18:31,945 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2024-09-13 04:18:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 04:18:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 86 [2024-09-13 04:18:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:18:31,947 INFO L225 Difference]: With dead ends: 98 [2024-09-13 04:18:31,947 INFO L226 Difference]: Without dead ends: 92 [2024-09-13 04:18:31,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 04:18:31,948 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-13 04:18:31,948 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 171 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 533 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-13 04:18:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-13 04:18:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-09-13 04:18:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 16 states have call successors, (16), 13 states have call predecessors, (16), 17 states have return successors, (43), 17 states have call predecessors, (43), 14 states have call successors, (43) [2024-09-13 04:18:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2024-09-13 04:18:32,010 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 86 [2024-09-13 04:18:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:18:32,010 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2024-09-13 04:18:32,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 23 states have internal predecessors, (35), 9 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-13 04:18:32,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2024-09-13 04:18:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 04:18:32,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:18:32,012 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:18:32,027 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 04:18:32,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:32,213 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:18:32,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:18:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -311680835, now seen corresponding path program 5 times [2024-09-13 04:18:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:18:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953034767] [2024-09-13 04:18:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:18:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:18:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:18:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626349173] [2024-09-13 04:18:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 04:18:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:18:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:18:32,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:18:32,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 04:18:32,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 04:18:32,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:18:32,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-09-13 04:18:32,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:18:32,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:18:32,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:18:32,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:18:32,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:18:32,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:18:32,947 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 51 treesize of output 35 [2024-09-13 04:18:50,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2024-09-13 04:18:50,640 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 121 treesize of output 77 [2024-09-13 04:18:50,720 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 107 treesize of output 67 [2024-09-13 04:18:50,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:18:50,733 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 73 treesize of output 69 [2024-09-13 04:18:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 7 proven. 89 refuted. 27 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 04:18:50,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:19:01,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:19:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953034767] [2024-09-13 04:19:01,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:19:01,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626349173] [2024-09-13 04:19:01,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626349173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:19:01,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:19:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-13 04:19:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731678440] [2024-09-13 04:19:01,146 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:19:01,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 04:19:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:19:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 04:19:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1196, Unknown=4, NotChecked=0, Total=1332 [2024-09-13 04:19:01,147 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand has 30 states, 24 states have (on average 1.75) internal successors, (42), 27 states have internal predecessors, (42), 10 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-13 04:19:05,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:19:10,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:19:17,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.53s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:19:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:19:17,723 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2024-09-13 04:19:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 04:19:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.75) internal successors, (42), 27 states have internal predecessors, (42), 10 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) Word has length 99 [2024-09-13 04:19:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:19:17,725 INFO L225 Difference]: With dead ends: 100 [2024-09-13 04:19:17,725 INFO L226 Difference]: Without dead ends: 94 [2024-09-13 04:19:17,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 65 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=217, Invalid=2035, Unknown=4, NotChecked=0, Total=2256 [2024-09-13 04:19:17,726 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2024-09-13 04:19:17,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 234 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 823 Invalid, 3 Unknown, 0 Unchecked, 15.9s Time] [2024-09-13 04:19:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-13 04:19:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-13 04:19:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 16 states have call successors, (16), 13 states have call predecessors, (16), 18 states have return successors, (48), 18 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-13 04:19:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2024-09-13 04:19:17,804 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 99 [2024-09-13 04:19:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:19:17,804 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2024-09-13 04:19:17,804 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.75) internal successors, (42), 27 states have internal predecessors, (42), 10 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-13 04:19:17,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:19:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2024-09-13 04:19:17,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-13 04:19:17,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:19:17,806 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:19:17,814 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 04:19:18,006 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 04:19:18,006 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:19:18,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:19:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1328596178, now seen corresponding path program 6 times [2024-09-13 04:19:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:19:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225317793] [2024-09-13 04:19:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:19:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:19:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:19:18,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764949493] [2024-09-13 04:19:18,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 04:19:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:19:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:19:18,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:19:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 04:19:19,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-13 04:19:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:19:19,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-09-13 04:19:19,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:19:19,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:19:19,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:19:45,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:19:49,912 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 61 treesize of output 53 [2024-09-13 04:20:05,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-13 04:20:05,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2024-09-13 04:20:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 49 proven. 67 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-09-13 04:20:06,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:20:17,925 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 98 treesize of output 86 [2024-09-13 04:20:18,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:20:18,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225317793] [2024-09-13 04:20:18,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:20:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764949493] [2024-09-13 04:20:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764949493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:20:18,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:20:18,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 04:20:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175643093] [2024-09-13 04:20:18,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:20:18,506 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 04:20:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:20:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 04:20:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=614, Unknown=5, NotChecked=0, Total=702 [2024-09-13 04:20:18,509 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 04:20:23,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:20:31,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:20:52,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:21:01,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:21:15,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:21:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:21:19,474 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-13 04:21:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 04:21:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 112 [2024-09-13 04:21:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:21:19,475 INFO L225 Difference]: With dead ends: 102 [2024-09-13 04:21:19,475 INFO L226 Difference]: Without dead ends: 92 [2024-09-13 04:21:19,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 84.1s TimeCoverageRelationStatistics Valid=228, Invalid=1482, Unknown=12, NotChecked=0, Total=1722 [2024-09-13 04:21:19,476 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 19 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:21:19,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 475 Invalid, 4 Unknown, 0 Unchecked, 23.5s Time] [2024-09-13 04:21:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-13 04:21:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2024-09-13 04:21:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 16 states have call successors, (16), 13 states have call predecessors, (16), 12 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2024-09-13 04:21:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2024-09-13 04:21:19,556 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 112 [2024-09-13 04:21:19,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:21:19,557 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2024-09-13 04:21:19,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 04:21:19,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:21:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2024-09-13 04:21:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 04:21:19,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:21:19,558 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:21:19,572 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 04:21:19,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 04:21:19,759 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:21:19,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:21:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1901826364, now seen corresponding path program 1 times [2024-09-13 04:21:19,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:21:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635414586] [2024-09-13 04:21:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:21:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:21:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:21:19,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312556006] [2024-09-13 04:21:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:21:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:21:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:21:19,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:21:19,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 04:21:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:21:20,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-09-13 04:21:20,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:21:21,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:21:21,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:21:21,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:21:22,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-13 04:21:22,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2024-09-13 04:21:49,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:21:49,438 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 83 treesize of output 56 [2024-09-13 04:21:49,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-09-13 04:21:49,538 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 110 treesize of output 74 [2024-09-13 04:21:50,556 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 114 treesize of output 74 [2024-09-13 04:21:50,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:21:50,849 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 80 treesize of output 76 [2024-09-13 04:21:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 24 refuted. 8 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 04:21:52,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:22:20,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:22:20,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635414586] [2024-09-13 04:22:20,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:22:20,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312556006] [2024-09-13 04:22:20,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312556006] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:22:20,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:22:20,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 04:22:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652987910] [2024-09-13 04:22:20,311 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:22:20,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 04:22:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:22:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 04:22:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=662, Unknown=1, NotChecked=0, Total=756 [2024-09-13 04:22:20,312 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 23 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 04:22:24,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:22:28,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:22:48,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:22:50,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:22:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:22:52,365 INFO L93 Difference]: Finished difference Result 92 states and 118 transitions. [2024-09-13 04:22:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 04:22:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 60 [2024-09-13 04:22:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:22:52,367 INFO L225 Difference]: With dead ends: 92 [2024-09-13 04:22:52,367 INFO L226 Difference]: Without dead ends: 86 [2024-09-13 04:22:52,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=155, Invalid=1176, Unknown=1, NotChecked=0, Total=1332 [2024-09-13 04:22:52,368 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2024-09-13 04:22:52,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 159 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 687 Invalid, 2 Unknown, 0 Unchecked, 25.8s Time] [2024-09-13 04:22:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-13 04:22:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-13 04:22:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 56 states have internal predecessors, (60), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-13 04:22:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2024-09-13 04:22:52,424 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 60 [2024-09-13 04:22:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:22:52,425 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2024-09-13 04:22:52,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 04:22:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2024-09-13 04:22:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 04:22:52,426 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:22:52,426 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:22:52,434 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 04:22:52,626 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:22:52,627 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:22:52,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:22:52,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1610585088, now seen corresponding path program 2 times [2024-09-13 04:22:52,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:22:52,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808345599] [2024-09-13 04:22:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:22:52,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:22:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:53,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 04:22:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:53,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 04:22:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:53,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 04:22:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:54,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 04:22:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:58,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 04:22:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:22:58,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 04:22:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:23:02,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 04:23:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:23:02,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-13 04:23:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:23:06,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 04:23:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 04:23:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-13 04:23:06,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:23:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808345599] [2024-09-13 04:23:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808345599] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:23:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761288216] [2024-09-13 04:23:06,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:23:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:23:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:23:06,052 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:23:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 04:23:06,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:23:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:23:06,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 04:23:06,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:23:06,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:23:09,387 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 40 treesize of output 17 [2024-09-13 04:23:14,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-13 04:23:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 04:23:15,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:23:18,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 04:23:28,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-13 04:23:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 04:23:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761288216] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 04:23:30,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 04:23:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 13] total 40 [2024-09-13 04:23:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385067881] [2024-09-13 04:23:30,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 04:23:30,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 04:23:30,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:23:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 04:23:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 04:23:30,622 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 40 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 34 states have internal predecessors, (60), 18 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 13 states have call predecessors, (20), 17 states have call successors, (20) [2024-09-13 04:23:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:23:57,155 INFO L93 Difference]: Finished difference Result 106 states and 164 transitions. [2024-09-13 04:23:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 04:23:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 34 states have internal predecessors, (60), 18 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 13 states have call predecessors, (20), 17 states have call successors, (20) Word has length 60 [2024-09-13 04:23:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:23:57,157 INFO L225 Difference]: With dead ends: 106 [2024-09-13 04:23:57,157 INFO L226 Difference]: Without dead ends: 100 [2024-09-13 04:23:57,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=396, Invalid=2796, Unknown=0, NotChecked=0, Total=3192 [2024-09-13 04:23:57,159 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2024-09-13 04:23:57,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 179 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2024-09-13 04:23:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-13 04:23:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2024-09-13 04:23:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 58 states have internal predecessors, (62), 16 states have call successors, (16), 13 states have call predecessors, (16), 15 states have return successors, (38), 16 states have call predecessors, (38), 14 states have call successors, (38) [2024-09-13 04:23:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 116 transitions. [2024-09-13 04:23:57,234 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 116 transitions. Word has length 60 [2024-09-13 04:23:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:23:57,234 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 116 transitions. [2024-09-13 04:23:57,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 34 states have internal predecessors, (60), 18 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 13 states have call predecessors, (20), 17 states have call successors, (20) [2024-09-13 04:23:57,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:23:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 116 transitions. [2024-09-13 04:23:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 04:23:57,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:23:57,236 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:23:57,249 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 04:23:57,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 04:23:57,436 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:23:57,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:23:57,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1829439806, now seen corresponding path program 2 times [2024-09-13 04:23:57,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:23:57,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516518134] [2024-09-13 04:23:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:23:57,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:23:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:23:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540839458] [2024-09-13 04:23:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 04:23:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:23:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:23:57,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:23:57,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 04:23:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 04:23:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:23:57,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-13 04:23:57,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:23:59,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:23:59,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:23:59,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:23:59,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:23:59,751 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 51 treesize of output 35 [2024-09-13 04:24:15,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:24:16,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 63 [2024-09-13 04:24:16,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-13 04:24:16,620 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 69 treesize of output 65 [2024-09-13 04:24:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 23 refuted. 8 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-13 04:24:18,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:24:45,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:24:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516518134] [2024-09-13 04:24:45,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:24:45,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540839458] [2024-09-13 04:24:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540839458] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:24:45,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:24:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 04:24:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511499281] [2024-09-13 04:24:45,317 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:24:45,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 04:24:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:24:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 04:24:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=567, Unknown=1, NotChecked=0, Total=650 [2024-09-13 04:24:45,318 INFO L87 Difference]: Start difference. First operand 88 states and 116 transitions. Second operand has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 04:24:49,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:24:53,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:24:57,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:25:11,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-13 04:25:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:25:13,996 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2024-09-13 04:25:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 04:25:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2024-09-13 04:25:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:25:13,999 INFO L225 Difference]: With dead ends: 96 [2024-09-13 04:25:13,999 INFO L226 Difference]: Without dead ends: 90 [2024-09-13 04:25:14,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=143, Invalid=1046, Unknown=1, NotChecked=0, Total=1190 [2024-09-13 04:25:14,000 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2024-09-13 04:25:14,001 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 135 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 495 Invalid, 3 Unknown, 0 Unchecked, 22.9s Time] [2024-09-13 04:25:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-13 04:25:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-09-13 04:25:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (42), 17 states have call predecessors, (42), 14 states have call successors, (42) [2024-09-13 04:25:14,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2024-09-13 04:25:14,070 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 60 [2024-09-13 04:25:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:25:14,070 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2024-09-13 04:25:14,070 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-13 04:25:14,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:25:14,071 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2024-09-13 04:25:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 04:25:14,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:25:14,072 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:25:14,091 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 04:25:14,276 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 04:25:14,277 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:25:14,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:25:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1606573013, now seen corresponding path program 3 times [2024-09-13 04:25:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:25:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800165989] [2024-09-13 04:25:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:25:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:25:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:25:14,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160198695] [2024-09-13 04:25:14,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 04:25:14,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:25:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:25:14,328 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:25:14,332 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 04:25:15,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 04:25:15,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:25:15,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-09-13 04:25:15,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:25:15,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-13 04:25:15,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:25:16,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:25:16,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:25:16,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-09-13 04:25:30,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:25:30,995 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 60 treesize of output 44 [2024-09-13 04:25:31,030 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 113 treesize of output 73 [2024-09-13 04:25:32,030 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 66 treesize of output 54 [2024-09-13 04:25:32,065 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 69 treesize of output 37 [2024-09-13 04:25:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 04:25:36,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 04:26:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 04:26:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800165989] [2024-09-13 04:26:12,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 04:26:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160198695] [2024-09-13 04:26:12,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160198695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 04:26:12,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 04:26:12,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-13 04:26:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666105515] [2024-09-13 04:26:12,432 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 04:26:12,433 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 04:26:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 04:26:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 04:26:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=731, Unknown=1, NotChecked=0, Total=812 [2024-09-13 04:26:12,433 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-13 04:26:29,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-09-13 04:26:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 04:26:31,814 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2024-09-13 04:26:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 04:26:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 73 [2024-09-13 04:26:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 04:26:31,815 INFO L225 Difference]: With dead ends: 100 [2024-09-13 04:26:31,815 INFO L226 Difference]: Without dead ends: 94 [2024-09-13 04:26:31,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=125, Invalid=1206, Unknown=1, NotChecked=0, Total=1332 [2024-09-13 04:26:31,816 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2024-09-13 04:26:31,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 167 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2024-09-13 04:26:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-13 04:26:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2024-09-13 04:26:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.105263157894737) internal successors, (63), 59 states have internal predecessors, (63), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (42), 17 states have call predecessors, (42), 14 states have call successors, (42) [2024-09-13 04:26:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2024-09-13 04:26:31,889 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 73 [2024-09-13 04:26:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 04:26:31,889 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2024-09-13 04:26:31,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-13 04:26:31,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:26:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2024-09-13 04:26:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-13 04:26:31,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 04:26:31,891 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 04:26:31,901 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 04:26:32,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 04:26:32,096 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 04:26:32,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 04:26:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 762567511, now seen corresponding path program 4 times [2024-09-13 04:26:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 04:26:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772176162] [2024-09-13 04:26:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 04:26:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 04:26:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 04:26:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460231279] [2024-09-13 04:26:32,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 04:26:32,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 04:26:32,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 04:26:32,148 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 04:26:32,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 04:26:32,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 04:26:32,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 04:26:32,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-13 04:26:32,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 04:26:32,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2024-09-13 04:26:32,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-13 04:26:32,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-13 04:26:32,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-09-13 04:26:47,905 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 67 treesize of output 51 [2024-09-13 04:26:47,948 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 126 treesize of output 86 [2024-09-13 04:26:48,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-13 04:26:48,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 65 [2024-09-13 04:26:48,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2024-09-13 04:26:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 04:26:51,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... Killed by 15